/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:36:18,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:36:18,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:36:18,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:36:18,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:36:18,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:36:18,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:36:18,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:36:18,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:36:18,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:36:18,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:36:18,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:36:18,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:36:18,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:36:18,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:36:18,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:36:18,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:36:18,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:36:18,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:36:18,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:36:18,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:36:18,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:36:18,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:36:18,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:36:18,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:36:18,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:36:18,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:36:18,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:36:18,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:36:18,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:36:18,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:36:18,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:36:18,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:36:18,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:36:18,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:36:18,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:36:18,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:36:18,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:36:18,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:36:18,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:36:18,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:36:18,645 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 [2020-09-21 12:36:18,670 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:36:18,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:36:18,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:36:18,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:36:18,672 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:36:18,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:36:18,673 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:36:18,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:36:18,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:36:18,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:36:18,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:36:18,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:36:18,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:36:18,674 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:36:18,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:36:18,674 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:36:18,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:36:18,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:36:18,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:36:18,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:36:18,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:36:18,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:36:18,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:36:18,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:36:18,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:36:18,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:36:18,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:36:18,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:36:18,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:36:18,677 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:36:19,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:36:19,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:36:19,175 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:36:19,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:36:19,177 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:36:19,179 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-21 12:36:19,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57ec5a040/ad40865076c5484c99bd6c532d2127f1/FLAGb79e91a1e [2020-09-21 12:36:19,784 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:36:19,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-21 12:36:19,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57ec5a040/ad40865076c5484c99bd6c532d2127f1/FLAGb79e91a1e [2020-09-21 12:36:20,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57ec5a040/ad40865076c5484c99bd6c532d2127f1 [2020-09-21 12:36:20,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:36:20,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:36:20,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:36:20,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:36:20,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:36:20,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:20" (1/1) ... [2020-09-21 12:36:20,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1003e016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20, skipping insertion in model container [2020-09-21 12:36:20,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:20" (1/1) ... [2020-09-21 12:36:20,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:36:20,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:36:20,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:36:20,422 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:36:20,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:36:20,463 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:36:20,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20 WrapperNode [2020-09-21 12:36:20,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:36:20,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:36:20,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:36:20,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:36:20,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20" (1/1) ... [2020-09-21 12:36:20,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20" (1/1) ... [2020-09-21 12:36:20,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20" (1/1) ... [2020-09-21 12:36:20,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20" (1/1) ... [2020-09-21 12:36:20,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20" (1/1) ... [2020-09-21 12:36:20,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20" (1/1) ... [2020-09-21 12:36:20,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20" (1/1) ... [2020-09-21 12:36:20,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:36:20,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:36:20,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:36:20,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:36:20,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20" (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 [2020-09-21 12:36:20,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:36:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:36:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:36:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:36:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:36:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:36:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:36:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:36:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:36:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:36:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:36:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:36:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:36:20,862 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:36:20,863 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:36:20,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:20 BoogieIcfgContainer [2020-09-21 12:36:20,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:36:20,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:36:20,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:36:20,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:36:20,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:36:20" (1/3) ... [2020-09-21 12:36:20,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580dfb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:20, skipping insertion in model container [2020-09-21 12:36:20,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:20" (2/3) ... [2020-09-21 12:36:20,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580dfb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:20, skipping insertion in model container [2020-09-21 12:36:20,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:20" (3/3) ... [2020-09-21 12:36:20,890 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-21 12:36:20,903 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:36:20,914 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:36:20,942 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:36:20,982 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:36:20,982 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:36:20,982 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:36:20,983 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:36:20,983 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:36:20,983 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:36:20,984 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:36:20,984 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:36:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 12:36:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 12:36:21,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:21,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:21,049 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:21,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1915647303, now seen corresponding path program 1 times [2020-09-21 12:36:21,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:21,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96059932] [2020-09-21 12:36:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:21,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:21,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:21,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:36:21,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:36:21,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-21 12:36:21,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:21,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:21,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:36:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:21,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:36:21,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:21,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:21,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:21,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:21,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:21,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:36:21,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:21,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:21,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:21,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:21,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96059932] [2020-09-21 12:36:21,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:36:21,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 12:36:21,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199653869] [2020-09-21 12:36:21,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 12:36:21,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:21,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 12:36:21,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 12:36:21,330 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-09-21 12:36:21,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:21,357 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-09-21 12:36:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 12:36:21,359 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 12:36:21,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:21,367 INFO L225 Difference]: With dead ends: 32 [2020-09-21 12:36:21,368 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 12:36:21,372 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 [2020-09-21 12:36:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 12:36:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 12:36:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 12:36:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-21 12:36:21,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-09-21 12:36:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:21,417 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-21 12:36:21,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 12:36:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-21 12:36:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 12:36:21,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:21,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:21,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:36:21,419 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:21,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:21,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2084433522, now seen corresponding path program 1 times [2020-09-21 12:36:21,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:21,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655061694] [2020-09-21 12:36:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:21,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:21,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:21,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 12:36:21,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:21,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-21 12:36:21,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:21,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:36:21,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:21,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:36:21,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:21,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:21,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:21,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:21,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:21,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:21,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:36:21,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:21,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:21,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:21,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:21,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655061694] [2020-09-21 12:36:21,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:36:21,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:36:21,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523124647] [2020-09-21 12:36:21,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:36:21,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:21,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:36:21,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:36:21,663 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-09-21 12:36:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:21,715 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-09-21 12:36:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:36:21,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-21 12:36:21,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:21,717 INFO L225 Difference]: With dead ends: 21 [2020-09-21 12:36:21,718 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 12:36:21,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:36:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 12:36:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-21 12:36:21,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 12:36:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 12:36:21,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-09-21 12:36:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:21,725 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 12:36:21,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:36:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 12:36:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 12:36:21,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:21,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:21,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:36:21,727 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:21,728 INFO L82 PathProgramCache]: Analyzing trace with hash 249504553, now seen corresponding path program 1 times [2020-09-21 12:36:21,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:21,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778782303] [2020-09-21 12:36:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:21,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:21,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:21,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 12:36:21,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:21,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-09-21 12:36:21,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:36:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:36:21,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:22,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:22,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:22,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:22,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:22,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:22,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:36:22,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:22,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:22,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:22,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:22,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:36:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:22,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778782303] [2020-09-21 12:36:22,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:22,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:36:22,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750759437] [2020-09-21 12:36:22,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:36:22,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:22,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:36:22,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:36:22,072 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-09-21 12:36:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:22,152 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-09-21 12:36:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:36:22,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-21 12:36:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:22,154 INFO L225 Difference]: With dead ends: 24 [2020-09-21 12:36:22,154 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 12:36:22,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:36:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 12:36:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 12:36:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 12:36:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-09-21 12:36:22,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2020-09-21 12:36:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:22,161 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-09-21 12:36:22,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:36:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-09-21 12:36:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 12:36:22,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:22,162 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:22,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:36:22,162 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:22,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2070634734, now seen corresponding path program 2 times [2020-09-21 12:36:22,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:22,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194116297] [2020-09-21 12:36:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:22,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:22,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:22,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:36:22,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:22,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-09-21 12:36:22,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:22,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:36:22,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:22,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:36:22,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:22,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:22,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:22,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:22,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:22,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:22,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:22,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:22,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194116297] [2020-09-21 12:36:22,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:22,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:36:22,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135011836] [2020-09-21 12:36:22,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:36:22,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:22,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:36:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:36:22,440 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-09-21 12:36:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:22,543 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-09-21 12:36:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:36:22,544 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-09-21 12:36:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:22,545 INFO L225 Difference]: With dead ends: 27 [2020-09-21 12:36:22,545 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 12:36:22,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:36:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 12:36:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-21 12:36:22,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 12:36:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-09-21 12:36:22,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 18 [2020-09-21 12:36:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:22,552 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-09-21 12:36:22,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:36:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-09-21 12:36:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 12:36:22,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:22,554 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:22,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:36:22,554 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:22,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1863528073, now seen corresponding path program 3 times [2020-09-21 12:36:22,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:22,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787759034] [2020-09-21 12:36:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:22,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:22,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:22,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 12:36:22,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:22,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-21 12:36:22,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:22,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:36:22,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:22,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:36:22,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:22,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:22,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:22,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:22,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:22,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:22,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:22,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:22,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:22,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787759034] [2020-09-21 12:36:22,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:22,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:36:22,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000303972] [2020-09-21 12:36:22,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:36:22,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:36:22,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:36:22,849 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-09-21 12:36:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:22,943 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-09-21 12:36:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:36:22,943 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-09-21 12:36:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:22,945 INFO L225 Difference]: With dead ends: 30 [2020-09-21 12:36:22,945 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 12:36:22,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:36:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 12:36:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 12:36:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 12:36:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-09-21 12:36:22,952 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 21 [2020-09-21 12:36:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:22,952 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-09-21 12:36:22,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:36:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-09-21 12:36:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:36:22,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:22,954 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:22,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:36:22,954 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:22,955 INFO L82 PathProgramCache]: Analyzing trace with hash -854829134, now seen corresponding path program 4 times [2020-09-21 12:36:22,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:22,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239235010] [2020-09-21 12:36:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:22,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:23,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:23,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:36:23,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:23,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-09-21 12:36:23,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:36:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:36:23,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:23,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:23,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:23,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:23,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:23,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:23,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:36:23,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:23,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:23,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:23,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:23,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:23,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239235010] [2020-09-21 12:36:23,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:23,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:36:23,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815019167] [2020-09-21 12:36:23,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:36:23,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:23,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:36:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:36:23,295 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2020-09-21 12:36:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:23,396 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-09-21 12:36:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:36:23,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-21 12:36:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:23,398 INFO L225 Difference]: With dead ends: 33 [2020-09-21 12:36:23,398 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 12:36:23,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:36:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 12:36:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-21 12:36:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 12:36:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-09-21 12:36:23,413 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2020-09-21 12:36:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:23,413 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-09-21 12:36:23,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:36:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-09-21 12:36:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:36:23,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:23,415 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:23,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:36:23,415 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:23,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1826016791, now seen corresponding path program 5 times [2020-09-21 12:36:23,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:23,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564771366] [2020-09-21 12:36:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:23,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:23,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:36:23,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:23,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-09-21 12:36:23,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:23,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:36:23,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:23,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:36:23,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:23,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:23,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:23,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:23,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:23,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:23,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:23,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:23,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564771366] [2020-09-21 12:36:23,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:23,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:36:23,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137978342] [2020-09-21 12:36:23,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:36:23,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:36:23,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:36:23,867 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 10 states. [2020-09-21 12:36:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:23,993 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-09-21 12:36:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:36:23,994 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-09-21 12:36:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:23,996 INFO L225 Difference]: With dead ends: 36 [2020-09-21 12:36:23,996 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:36:23,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:36:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:36:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-21 12:36:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 12:36:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-09-21 12:36:24,009 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 27 [2020-09-21 12:36:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:24,009 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-09-21 12:36:24,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:36:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-09-21 12:36:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:36:24,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:24,012 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:24,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:36:24,012 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:24,013 INFO L82 PathProgramCache]: Analyzing trace with hash 717166674, now seen corresponding path program 6 times [2020-09-21 12:36:24,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:24,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744713435] [2020-09-21 12:36:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:24,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:24,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:24,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:36:24,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:24,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-09-21 12:36:24,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:24,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:36:24,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:24,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 12:36:24,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:24,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:24,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:24,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:24,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:24,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:24,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:24,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:24,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:24,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:24,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:24,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:24,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744713435] [2020-09-21 12:36:24,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:24,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:36:24,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939997235] [2020-09-21 12:36:24,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:36:24,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:36:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:36:24,457 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 11 states. [2020-09-21 12:36:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:24,587 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-09-21 12:36:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:36:24,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-09-21 12:36:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:24,589 INFO L225 Difference]: With dead ends: 39 [2020-09-21 12:36:24,589 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 12:36:24,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:36:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 12:36:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-21 12:36:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 12:36:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-09-21 12:36:24,596 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2020-09-21 12:36:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:24,597 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-09-21 12:36:24,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:36:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-09-21 12:36:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 12:36:24,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:24,598 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:24,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:36:24,599 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1472671049, now seen corresponding path program 7 times [2020-09-21 12:36:24,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:24,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766316131] [2020-09-21 12:36:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:24,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:24,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:24,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 12:36:24,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:24,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-09-21 12:36:24,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:24,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 12:36:24,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:24,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 12:36:24,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:25,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:25,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:25,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:25,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:25,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:25,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:25,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:25,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:25,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:25,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766316131] [2020-09-21 12:36:25,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:25,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:36:25,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477581357] [2020-09-21 12:36:25,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:36:25,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:25,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:36:25,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:36:25,065 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 12 states. [2020-09-21 12:36:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:25,223 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-09-21 12:36:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:36:25,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-09-21 12:36:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:25,225 INFO L225 Difference]: With dead ends: 42 [2020-09-21 12:36:25,225 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 12:36:25,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:36:25,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 12:36:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-21 12:36:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 12:36:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-09-21 12:36:25,238 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 33 [2020-09-21 12:36:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:25,239 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-09-21 12:36:25,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:36:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-09-21 12:36:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 12:36:25,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:25,241 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:25,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:36:25,242 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1220091662, now seen corresponding path program 8 times [2020-09-21 12:36:25,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:25,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081326937] [2020-09-21 12:36:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:25,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:25,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:25,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 12:36:25,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-09-21 12:36:25,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 12:36:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-21 12:36:25,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:25,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:25,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:25,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:25,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:25,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:25,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:25,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:25,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:25,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081326937] [2020-09-21 12:36:25,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:25,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 12:36:25,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609306884] [2020-09-21 12:36:25,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 12:36:25,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:25,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 12:36:25,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:36:25,788 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 13 states. [2020-09-21 12:36:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:25,989 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-09-21 12:36:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 12:36:25,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-21 12:36:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:25,993 INFO L225 Difference]: With dead ends: 45 [2020-09-21 12:36:25,993 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 12:36:25,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:36:25,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 12:36:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 12:36:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 12:36:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-09-21 12:36:26,008 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 36 [2020-09-21 12:36:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:26,009 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-09-21 12:36:26,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 12:36:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-09-21 12:36:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 12:36:26,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:26,012 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:26,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:36:26,013 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash 85139625, now seen corresponding path program 9 times [2020-09-21 12:36:26,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:26,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137580181] [2020-09-21 12:36:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:26,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:26,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:26,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 12:36:26,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:26,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-09-21 12:36:26,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:26,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 12:36:26,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:26,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 12:36:26,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:26,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:26,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:26,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:26,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:26,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:26,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:26,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:26,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:26,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:26,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:26,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:26,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137580181] [2020-09-21 12:36:26,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:26,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 12:36:26,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226639312] [2020-09-21 12:36:26,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 12:36:26,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 12:36:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:36:26,696 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 14 states. [2020-09-21 12:36:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:26,915 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-09-21 12:36:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 12:36:26,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-09-21 12:36:26,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:26,917 INFO L225 Difference]: With dead ends: 48 [2020-09-21 12:36:26,917 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 12:36:26,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:36:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 12:36:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-21 12:36:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 12:36:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-09-21 12:36:26,924 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 39 [2020-09-21 12:36:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:26,924 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-09-21 12:36:26,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 12:36:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-09-21 12:36:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 12:36:26,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:26,926 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:26,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:36:26,926 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:26,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1891479954, now seen corresponding path program 10 times [2020-09-21 12:36:26,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:26,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371795388] [2020-09-21 12:36:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:26,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:27,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:27,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 12:36:27,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:27,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-09-21 12:36:27,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 12:36:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 12:36:27,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:27,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:27,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:27,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:27,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:27,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:27,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:27,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:27,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:27,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:27,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:27,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:27,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371795388] [2020-09-21 12:36:27,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:27,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 12:36:27,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939749483] [2020-09-21 12:36:27,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 12:36:27,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:27,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 12:36:27,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:36:27,660 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 15 states. [2020-09-21 12:36:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:27,899 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-09-21 12:36:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 12:36:27,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-09-21 12:36:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:27,900 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:36:27,901 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 12:36:27,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:36:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 12:36:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-09-21 12:36:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 12:36:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-09-21 12:36:27,917 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 42 [2020-09-21 12:36:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:27,917 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-09-21 12:36:27,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 12:36:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-09-21 12:36:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 12:36:27,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:27,918 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:27,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:36:27,919 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:27,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1363997687, now seen corresponding path program 11 times [2020-09-21 12:36:27,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:27,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841852221] [2020-09-21 12:36:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:27,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:28,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:28,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 12:36:28,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:28,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-09-21 12:36:28,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:28,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 12:36:28,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:28,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-21 12:36:28,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:28,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:28,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:28,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:28,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:28,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:28,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:28,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:28,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841852221] [2020-09-21 12:36:28,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:28,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 12:36:28,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324780123] [2020-09-21 12:36:28,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 12:36:28,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:28,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 12:36:28,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:36:28,800 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 16 states. [2020-09-21 12:36:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:29,156 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-09-21 12:36:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 12:36:29,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-09-21 12:36:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:29,158 INFO L225 Difference]: With dead ends: 54 [2020-09-21 12:36:29,158 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 12:36:29,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-09-21 12:36:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 12:36:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-21 12:36:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 12:36:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-09-21 12:36:29,177 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 45 [2020-09-21 12:36:29,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:29,177 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-09-21 12:36:29,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 12:36:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-09-21 12:36:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 12:36:29,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:29,186 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:29,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:36:29,187 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:29,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:29,187 INFO L82 PathProgramCache]: Analyzing trace with hash -641889742, now seen corresponding path program 12 times [2020-09-21 12:36:29,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:29,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645627712] [2020-09-21 12:36:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:29,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:29,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:29,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 12:36:29,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:29,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-09-21 12:36:29,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:29,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 12:36:29,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:29,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 12:36:29,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:30,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:30,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:30,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:30,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:30,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:30,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:30,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:30,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:30,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:30,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:30,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:30,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645627712] [2020-09-21 12:36:30,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:30,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 12:36:30,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788681577] [2020-09-21 12:36:30,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 12:36:30,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 12:36:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-21 12:36:30,198 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 17 states. [2020-09-21 12:36:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:30,508 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-09-21 12:36:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 12:36:30,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-21 12:36:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:30,509 INFO L225 Difference]: With dead ends: 57 [2020-09-21 12:36:30,509 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 12:36:30,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-09-21 12:36:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 12:36:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-09-21 12:36:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-21 12:36:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-09-21 12:36:30,520 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 48 [2020-09-21 12:36:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:30,520 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-09-21 12:36:30,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 12:36:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-09-21 12:36:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 12:36:30,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:30,521 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:30,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 12:36:30,521 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:30,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:30,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1815285911, now seen corresponding path program 13 times [2020-09-21 12:36:30,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:30,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926560979] [2020-09-21 12:36:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:30,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:31,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:31,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-21 12:36:31,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:31,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-09-21 12:36:31,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 12:36:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 12:36:31,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:31,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:31,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:31,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:31,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:31,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:31,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:31,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:31,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:31,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:31,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926560979] [2020-09-21 12:36:31,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:31,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 12:36:31,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689767477] [2020-09-21 12:36:31,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 12:36:31,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:31,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 12:36:31,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-09-21 12:36:31,598 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 18 states. [2020-09-21 12:36:31,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:31,943 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2020-09-21 12:36:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 12:36:31,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-09-21 12:36:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:31,945 INFO L225 Difference]: With dead ends: 60 [2020-09-21 12:36:31,945 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 12:36:31,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-09-21 12:36:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 12:36:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-21 12:36:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 12:36:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-09-21 12:36:31,955 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51 [2020-09-21 12:36:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:31,958 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-09-21 12:36:31,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 12:36:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-09-21 12:36:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 12:36:31,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:31,960 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:31,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 12:36:31,960 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1721734446, now seen corresponding path program 14 times [2020-09-21 12:36:31,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:31,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912047832] [2020-09-21 12:36:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:32,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:32,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:32,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 12:36:32,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:32,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-09-21 12:36:32,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:32,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 12:36:32,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:32,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-21 12:36:32,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:33,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:33,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:33,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:33,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:33,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:33,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:33,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:33,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:33,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:33,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:33,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:33,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912047832] [2020-09-21 12:36:33,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:33,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 12:36:33,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912284006] [2020-09-21 12:36:33,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 12:36:33,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:33,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 12:36:33,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-09-21 12:36:33,116 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 19 states. [2020-09-21 12:36:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:33,500 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-09-21 12:36:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 12:36:33,500 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-09-21 12:36:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:33,501 INFO L225 Difference]: With dead ends: 63 [2020-09-21 12:36:33,501 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 12:36:33,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-09-21 12:36:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 12:36:33,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-09-21 12:36:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 12:36:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-09-21 12:36:33,515 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 54 [2020-09-21 12:36:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:33,515 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-09-21 12:36:33,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 12:36:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-09-21 12:36:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 12:36:33,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:33,516 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:33,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 12:36:33,516 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2131151561, now seen corresponding path program 15 times [2020-09-21 12:36:33,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:33,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000583856] [2020-09-21 12:36:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:33,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:34,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:34,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 12:36:34,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:34,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-09-21 12:36:34,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:34,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 12:36:34,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:34,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 12:36:34,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:34,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:34,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:34,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:34,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:34,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:34,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:34,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:34,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:34,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000583856] [2020-09-21 12:36:34,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:34,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 12:36:34,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879158914] [2020-09-21 12:36:34,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 12:36:34,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 12:36:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-09-21 12:36:34,638 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 20 states. [2020-09-21 12:36:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:35,044 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-09-21 12:36:35,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 12:36:35,044 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-09-21 12:36:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:35,045 INFO L225 Difference]: With dead ends: 66 [2020-09-21 12:36:35,045 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 12:36:35,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-09-21 12:36:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 12:36:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-09-21 12:36:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 12:36:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2020-09-21 12:36:35,053 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 57 [2020-09-21 12:36:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:35,053 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2020-09-21 12:36:35,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 12:36:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2020-09-21 12:36:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 12:36:35,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:35,054 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:35,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 12:36:35,055 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash 457200498, now seen corresponding path program 16 times [2020-09-21 12:36:35,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:35,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267354566] [2020-09-21 12:36:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:35,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:35,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:35,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 12:36:35,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:35,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-09-21 12:36:35,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 12:36:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-21 12:36:35,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:36,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:36,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:36,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:36,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:36,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:36,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:36,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:36,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:36,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:36,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267354566] [2020-09-21 12:36:36,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:36,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 12:36:36,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740648871] [2020-09-21 12:36:36,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 12:36:36,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:36,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 12:36:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-09-21 12:36:36,333 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 21 states. [2020-09-21 12:36:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:36,790 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2020-09-21 12:36:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 12:36:36,791 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-09-21 12:36:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:36,792 INFO L225 Difference]: With dead ends: 69 [2020-09-21 12:36:36,792 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 12:36:36,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-09-21 12:36:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 12:36:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-09-21 12:36:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 12:36:36,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-09-21 12:36:36,800 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 60 [2020-09-21 12:36:36,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:36,800 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-09-21 12:36:36,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 12:36:36,801 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-09-21 12:36:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 12:36:36,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:36,802 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:36,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 12:36:36,802 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:36,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:36,803 INFO L82 PathProgramCache]: Analyzing trace with hash 646356521, now seen corresponding path program 17 times [2020-09-21 12:36:36,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:36,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668004112] [2020-09-21 12:36:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:36,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:37,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:37,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 12:36:37,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:37,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:36:37,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:37,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 12:36:37,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:37,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-21 12:36:37,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:38,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:38,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:38,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:38,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:38,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:38,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:38,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:38,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:38,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:38,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:38,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668004112] [2020-09-21 12:36:38,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:38,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 12:36:38,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922884666] [2020-09-21 12:36:38,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 12:36:38,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 12:36:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-09-21 12:36:38,226 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 22 states. [2020-09-21 12:36:38,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:38,799 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-09-21 12:36:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 12:36:38,799 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-09-21 12:36:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:38,800 INFO L225 Difference]: With dead ends: 72 [2020-09-21 12:36:38,800 INFO L226 Difference]: Without dead ends: 67 [2020-09-21 12:36:38,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-09-21 12:36:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-21 12:36:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-09-21 12:36:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 12:36:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2020-09-21 12:36:38,807 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 63 [2020-09-21 12:36:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:38,807 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2020-09-21 12:36:38,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 12:36:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2020-09-21 12:36:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 12:36:38,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:38,808 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:38,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 12:36:38,809 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:38,809 INFO L82 PathProgramCache]: Analyzing trace with hash 796345362, now seen corresponding path program 18 times [2020-09-21 12:36:38,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:38,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966940810] [2020-09-21 12:36:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:38,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:39,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:39,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-21 12:36:39,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:39,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:36:39,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:39,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 12:36:39,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:39,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-09-21 12:36:39,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:40,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:40,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:40,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:40,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:40,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:40,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:40,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:40,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:40,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966940810] [2020-09-21 12:36:40,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:40,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 12:36:40,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142543870] [2020-09-21 12:36:40,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 12:36:40,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:40,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 12:36:40,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-09-21 12:36:40,227 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 23 states. [2020-09-21 12:36:40,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:40,843 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-09-21 12:36:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 12:36:40,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-09-21 12:36:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:40,845 INFO L225 Difference]: With dead ends: 75 [2020-09-21 12:36:40,845 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 12:36:40,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-09-21 12:36:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 12:36:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-09-21 12:36:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 12:36:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-09-21 12:36:40,854 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 66 [2020-09-21 12:36:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:40,854 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-09-21 12:36:40,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 12:36:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-09-21 12:36:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 12:36:40,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:40,855 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:40,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 12:36:40,856 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:40,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1947047543, now seen corresponding path program 19 times [2020-09-21 12:36:40,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:40,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608853076] [2020-09-21 12:36:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:40,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:41,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:41,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-21 12:36:41,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:41,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-21 12:36:41,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 12:36:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-21 12:36:41,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:42,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:42,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:42,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:42,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:42,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:42,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:42,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:42,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:42,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:42,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:42,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:42,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608853076] [2020-09-21 12:36:42,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:42,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 12:36:42,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857556013] [2020-09-21 12:36:42,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 12:36:42,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:42,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 12:36:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-09-21 12:36:42,332 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 24 states. [2020-09-21 12:36:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:42,989 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-09-21 12:36:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 12:36:42,989 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-09-21 12:36:42,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:42,991 INFO L225 Difference]: With dead ends: 78 [2020-09-21 12:36:42,991 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 12:36:42,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-09-21 12:36:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 12:36:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-09-21 12:36:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 12:36:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-09-21 12:36:42,999 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 69 [2020-09-21 12:36:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:42,999 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-09-21 12:36:42,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 12:36:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-09-21 12:36:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-21 12:36:43,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:43,000 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:43,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 12:36:43,001 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:43,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1432404814, now seen corresponding path program 20 times [2020-09-21 12:36:43,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:43,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843354091] [2020-09-21 12:36:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:43,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:44,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:44,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-21 12:36:44,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:44,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-09-21 12:36:44,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:44,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-21 12:36:44,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:44,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-21 12:36:44,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:44,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:44,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:44,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:44,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:44,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:44,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:44,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:44,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:44,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:44,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:44,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:44,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843354091] [2020-09-21 12:36:44,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:44,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 12:36:44,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177631907] [2020-09-21 12:36:44,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 12:36:44,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 12:36:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-09-21 12:36:44,533 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 25 states. [2020-09-21 12:36:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:45,339 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-09-21 12:36:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 12:36:45,340 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-09-21 12:36:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:45,341 INFO L225 Difference]: With dead ends: 81 [2020-09-21 12:36:45,341 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 12:36:45,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-09-21 12:36:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 12:36:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-21 12:36:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 12:36:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-09-21 12:36:45,348 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 72 [2020-09-21 12:36:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:45,349 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-09-21 12:36:45,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 12:36:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-09-21 12:36:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-21 12:36:45,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:45,350 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:45,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 12:36:45,350 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:45,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:45,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1550855401, now seen corresponding path program 21 times [2020-09-21 12:36:45,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:45,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033127600] [2020-09-21 12:36:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:45,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:46,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:46,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-21 12:36:46,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:46,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:36:46,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:46,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-21 12:36:46,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:46,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-21 12:36:46,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:46,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:46,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:46,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:46,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:46,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:46,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:46,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:46,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:46,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033127600] [2020-09-21 12:36:46,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:46,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 12:36:46,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028045588] [2020-09-21 12:36:46,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 12:36:46,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 12:36:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-09-21 12:36:46,917 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 26 states. [2020-09-21 12:36:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:47,776 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-09-21 12:36:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 12:36:47,777 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-09-21 12:36:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:47,779 INFO L225 Difference]: With dead ends: 84 [2020-09-21 12:36:47,779 INFO L226 Difference]: Without dead ends: 79 [2020-09-21 12:36:47,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-09-21 12:36:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-21 12:36:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-09-21 12:36:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 12:36:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2020-09-21 12:36:47,789 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 75 [2020-09-21 12:36:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:47,789 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2020-09-21 12:36:47,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 12:36:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2020-09-21 12:36:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-21 12:36:47,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:47,791 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:47,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 12:36:47,792 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:47,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:47,792 INFO L82 PathProgramCache]: Analyzing trace with hash 97664338, now seen corresponding path program 22 times [2020-09-21 12:36:47,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:47,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46659455] [2020-09-21 12:36:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:47,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:48,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:48,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-21 12:36:48,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:48,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-09-21 12:36:48,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:48,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 12:36:48,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-21 12:36:48,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:49,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:49,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:49,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:49,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:49,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:49,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:49,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:49,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:49,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:49,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:49,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:49,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46659455] [2020-09-21 12:36:49,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:49,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 12:36:49,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133008015] [2020-09-21 12:36:49,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 12:36:49,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:49,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 12:36:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-09-21 12:36:49,437 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 27 states. [2020-09-21 12:36:50,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:50,214 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-09-21 12:36:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 12:36:50,214 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-09-21 12:36:50,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:50,215 INFO L225 Difference]: With dead ends: 87 [2020-09-21 12:36:50,215 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 12:36:50,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-09-21 12:36:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 12:36:50,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-09-21 12:36:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-21 12:36:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-09-21 12:36:50,223 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 78 [2020-09-21 12:36:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:50,224 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-09-21 12:36:50,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 12:36:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-09-21 12:36:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-21 12:36:50,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:50,225 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:50,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 12:36:50,225 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:50,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1353050185, now seen corresponding path program 23 times [2020-09-21 12:36:50,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:50,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079074173] [2020-09-21 12:36:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:50,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:51,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:51,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-21 12:36:51,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:51,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-21 12:36:51,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:51,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-21 12:36:51,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:51,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-21 12:36:51,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:51,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:51,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:51,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:51,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:51,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:51,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:51,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:51,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:51,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079074173] [2020-09-21 12:36:51,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:51,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 12:36:51,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371216019] [2020-09-21 12:36:51,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 12:36:51,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:51,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 12:36:51,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-09-21 12:36:51,849 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 28 states. [2020-09-21 12:36:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:52,850 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-09-21 12:36:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 12:36:52,850 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-09-21 12:36:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:52,852 INFO L225 Difference]: With dead ends: 90 [2020-09-21 12:36:52,852 INFO L226 Difference]: Without dead ends: 85 [2020-09-21 12:36:52,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-09-21 12:36:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-21 12:36:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-09-21 12:36:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-21 12:36:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2020-09-21 12:36:52,870 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 81 [2020-09-21 12:36:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:52,870 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2020-09-21 12:36:52,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 12:36:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2020-09-21 12:36:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-21 12:36:52,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:52,875 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:52,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 12:36:52,876 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:52,876 INFO L82 PathProgramCache]: Analyzing trace with hash -22395406, now seen corresponding path program 24 times [2020-09-21 12:36:52,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:52,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171915635] [2020-09-21 12:36:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:53,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:53,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-21 12:36:53,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:53,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:36:53,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:53,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-21 12:36:53,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:53,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-09-21 12:36:53,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:54,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:54,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:54,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:54,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:54,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:54,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:54,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:54,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:54,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:54,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:54,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:54,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171915635] [2020-09-21 12:36:54,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:54,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 12:36:54,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411397436] [2020-09-21 12:36:54,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 12:36:54,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 12:36:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-09-21 12:36:54,544 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand 29 states. [2020-09-21 12:36:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:55,585 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-09-21 12:36:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-21 12:36:55,586 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 84 [2020-09-21 12:36:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:55,587 INFO L225 Difference]: With dead ends: 93 [2020-09-21 12:36:55,587 INFO L226 Difference]: Without dead ends: 88 [2020-09-21 12:36:55,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-09-21 12:36:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-21 12:36:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-09-21 12:36:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-21 12:36:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2020-09-21 12:36:55,597 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 84 [2020-09-21 12:36:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:55,597 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2020-09-21 12:36:55,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 12:36:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2020-09-21 12:36:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-21 12:36:55,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:55,599 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:55,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 12:36:55,599 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1933993047, now seen corresponding path program 25 times [2020-09-21 12:36:55,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:55,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583008853] [2020-09-21 12:36:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:55,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:56,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:56,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-21 12:36:56,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:56,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-21 12:36:56,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:56,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-21 12:36:56,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:56,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-21 12:36:56,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:57,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:57,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:57,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:57,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:57,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:57,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:36:57,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:57,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:57,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583008853] [2020-09-21 12:36:57,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:57,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 12:36:57,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599699084] [2020-09-21 12:36:57,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 12:36:57,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 12:36:57,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-09-21 12:36:57,280 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand 30 states. [2020-09-21 12:36:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:58,466 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-09-21 12:36:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 12:36:58,467 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-09-21 12:36:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:58,468 INFO L225 Difference]: With dead ends: 96 [2020-09-21 12:36:58,468 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 12:36:58,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-09-21 12:36:58,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 12:36:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-09-21 12:36:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 12:36:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2020-09-21 12:36:58,477 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 87 [2020-09-21 12:36:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:58,477 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2020-09-21 12:36:58,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 12:36:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2020-09-21 12:36:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-21 12:36:58,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:58,478 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:58,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 12:36:58,479 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash 927028882, now seen corresponding path program 26 times [2020-09-21 12:36:58,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:58,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874991606] [2020-09-21 12:36:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:58,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:59,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:59,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-21 12:36:59,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:59,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:36:59,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:59,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-21 12:36:59,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-09-21 12:36:59,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:00,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:00,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:00,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:00,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:37:00,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:00,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:37:00,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:00,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:00,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:00,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:00,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:00,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874991606] [2020-09-21 12:37:00,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:00,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 12:37:00,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585575760] [2020-09-21 12:37:00,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 12:37:00,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:00,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 12:37:00,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-09-21 12:37:00,248 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand 31 states. [2020-09-21 12:37:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:01,556 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2020-09-21 12:37:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-21 12:37:01,557 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 90 [2020-09-21 12:37:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:01,559 INFO L225 Difference]: With dead ends: 99 [2020-09-21 12:37:01,559 INFO L226 Difference]: Without dead ends: 94 [2020-09-21 12:37:01,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-09-21 12:37:01,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-21 12:37:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-09-21 12:37:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-21 12:37:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-09-21 12:37:01,568 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 90 [2020-09-21 12:37:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:01,568 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-09-21 12:37:01,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 12:37:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-09-21 12:37:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 12:37:01,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:01,570 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:01,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 12:37:01,570 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:01,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:01,570 INFO L82 PathProgramCache]: Analyzing trace with hash 5326601, now seen corresponding path program 27 times [2020-09-21 12:37:01,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:01,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124747919] [2020-09-21 12:37:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:01,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:02,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:02,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-21 12:37:02,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-21 12:37:02,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-21 12:37:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:37:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-21 12:37:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:03,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:03,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:03,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:37:03,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:03,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:37:03,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:03,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:03,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:03,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:03,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:03,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124747919] [2020-09-21 12:37:03,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:03,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 12:37:03,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649813531] [2020-09-21 12:37:03,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 12:37:03,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:03,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 12:37:03,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-09-21 12:37:03,463 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 32 states. [2020-09-21 12:37:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:04,806 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-09-21 12:37:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 12:37:04,807 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-09-21 12:37:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:04,809 INFO L225 Difference]: With dead ends: 102 [2020-09-21 12:37:04,809 INFO L226 Difference]: Without dead ends: 97 [2020-09-21 12:37:04,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 12:37:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-21 12:37:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-09-21 12:37:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-21 12:37:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2020-09-21 12:37:04,818 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 93 [2020-09-21 12:37:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:04,819 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2020-09-21 12:37:04,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 12:37:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2020-09-21 12:37:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-21 12:37:04,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:04,820 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:04,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 12:37:04,820 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:04,821 INFO L82 PathProgramCache]: Analyzing trace with hash -701403342, now seen corresponding path program 28 times [2020-09-21 12:37:04,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:04,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080968662] [2020-09-21 12:37:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:04,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:05,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:05,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-21 12:37:05,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:05,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-21 12:37:05,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:05,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-21 12:37:05,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:37:05,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-21 12:37:05,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:06,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:06,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:06,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:06,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:37:06,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:06,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:37:06,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:06,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:06,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:06,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:06,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:06,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080968662] [2020-09-21 12:37:06,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:06,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-21 12:37:06,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924104416] [2020-09-21 12:37:06,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-21 12:37:06,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:06,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-21 12:37:06,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 12:37:06,725 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 33 states. [2020-09-21 12:37:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:08,216 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2020-09-21 12:37:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-21 12:37:08,217 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 96 [2020-09-21 12:37:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:08,218 INFO L225 Difference]: With dead ends: 105 [2020-09-21 12:37:08,219 INFO L226 Difference]: Without dead ends: 100 [2020-09-21 12:37:08,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 12:37:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-21 12:37:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-09-21 12:37:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-21 12:37:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-09-21 12:37:08,229 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 96 [2020-09-21 12:37:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:08,229 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-09-21 12:37:08,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-21 12:37:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-09-21 12:37:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-21 12:37:08,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:08,230 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:08,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 12:37:08,231 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash -963450263, now seen corresponding path program 29 times [2020-09-21 12:37:08,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:08,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821664219] [2020-09-21 12:37:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:08,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:09,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:09,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-21 12:37:09,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:09,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-09-21 12:37:09,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:09,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-21 12:37:09,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:37:09,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-09-21 12:37:09,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:10,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:10,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:10,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:10,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:37:10,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:10,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:37:10,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:10,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:10,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821664219] [2020-09-21 12:37:10,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:10,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-21 12:37:10,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379747116] [2020-09-21 12:37:10,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-21 12:37:10,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:10,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-21 12:37:10,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 12:37:10,212 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 34 states.