/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:10:41,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:10:41,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:10:41,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:10:41,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:10:41,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:10:41,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:10:41,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:10:41,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:10:41,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:10:41,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:10:41,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:10:41,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:10:41,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:10:41,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:10:41,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:10:41,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:10:41,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:10:41,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:10:41,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:10:41,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:10:41,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:10:41,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:10:41,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:10:41,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:10:41,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:10:41,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:10:41,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:10:41,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:10:41,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:10:41,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:10:41,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:10:41,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:10:41,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:10:41,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:10:41,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:10:41,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:10:41,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:10:41,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:10:41,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:10:41,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:10:41,836 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 [2020-10-12 16:10:41,879 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:10:41,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:10:41,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:10:41,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:10:41,881 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:10:41,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:10:41,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:10:41,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:10:41,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:10:41,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:10:41,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:10:41,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:10:41,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:10:41,884 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:10:41,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:10:41,885 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:10:41,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:10:41,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:10:41,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:10:41,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:10:41,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:10:41,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:10:41,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:10:41,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:10:41,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:10:41,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:10:41,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:10:41,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:10:41,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:10:41,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:10:42,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:10:42,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:10:42,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:10:42,181 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:10:42,181 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:10:42,182 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c [2020-10-12 16:10:42,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5735904c/19271e58d8654e9d8826ad030401bc67/FLAG787d2205d [2020-10-12 16:10:42,648 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:10:42,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de31.c [2020-10-12 16:10:42,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5735904c/19271e58d8654e9d8826ad030401bc67/FLAG787d2205d [2020-10-12 16:10:43,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5735904c/19271e58d8654e9d8826ad030401bc67 [2020-10-12 16:10:43,027 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:10:43,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:10:43,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:10:43,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:10:43,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:10:43,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:10:43" (1/1) ... [2020-10-12 16:10:43,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6317371b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43, skipping insertion in model container [2020-10-12 16:10:43,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:10:43" (1/1) ... [2020-10-12 16:10:43,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:10:43,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:10:43,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:10:43,238 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:10:43,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:10:43,271 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:10:43,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43 WrapperNode [2020-10-12 16:10:43,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:10:43,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:10:43,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:10:43,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:10:43,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43" (1/1) ... [2020-10-12 16:10:43,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43" (1/1) ... [2020-10-12 16:10:43,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43" (1/1) ... [2020-10-12 16:10:43,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43" (1/1) ... [2020-10-12 16:10:43,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43" (1/1) ... [2020-10-12 16:10:43,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43" (1/1) ... [2020-10-12 16:10:43,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43" (1/1) ... [2020-10-12 16:10:43,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:10:43,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:10:43,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:10:43,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:10:43,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43" (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 [2020-10-12 16:10:43,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:10:43,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:10:43,439 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:10:43,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:10:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:10:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:10:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:10:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:10:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:10:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:10:43,634 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:10:43,634 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 16:10:43,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:10:43 BoogieIcfgContainer [2020-10-12 16:10:43,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:10:43,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:10:43,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:10:43,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:10:43,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:10:43" (1/3) ... [2020-10-12 16:10:43,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1862b0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:10:43, skipping insertion in model container [2020-10-12 16:10:43,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:43" (2/3) ... [2020-10-12 16:10:43,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1862b0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:10:43, skipping insertion in model container [2020-10-12 16:10:43,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:10:43" (3/3) ... [2020-10-12 16:10:43,645 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de31.c [2020-10-12 16:10:43,656 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:10:43,665 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:10:43,686 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:10:43,712 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:10:43,712 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:10:43,712 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:10:43,712 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:10:43,713 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:10:43,713 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:10:43,713 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:10:43,713 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:10:43,736 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-12 16:10:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:10:43,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:43,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:43,743 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1939139363, now seen corresponding path program 1 times [2020-10-12 16:10:43,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:43,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141956433] [2020-10-12 16:10:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:43,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:44,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:44,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:44,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:10:44,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:44,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-12 16:10:44,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:44,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:10:44,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:44,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:10:44,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:10:44,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:44,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:44,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:44,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:44,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:10:44,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:44,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:44,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:44,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:10:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:44,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141956433] [2020-10-12 16:10:44,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:10:44,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 16:10:44,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460402617] [2020-10-12 16:10:44,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:10:44,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:10:44,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:44,611 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2020-10-12 16:10:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:44,804 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2020-10-12 16:10:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:10:44,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-12 16:10:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:44,817 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:10:44,817 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 16:10:44,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:10:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 16:10:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-10-12 16:10:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 16:10:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-10-12 16:10:44,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2020-10-12 16:10:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:44,866 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-10-12 16:10:44,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:10:44,866 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-10-12 16:10:44,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:10:44,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:44,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:44,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:10:44,868 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash 51759658, now seen corresponding path program 1 times [2020-10-12 16:10:44,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:44,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639645658] [2020-10-12 16:10:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:44,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:44,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:44,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:44,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:10:44,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:44,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-12 16:10:44,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:44,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:10:44,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:10:44,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 16:10:44,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:45,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:45,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:45,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:45,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:45,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:45,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:45,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:45,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:45,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:45,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:45,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639645658] [2020-10-12 16:10:45,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:10:45,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:10:45,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420625599] [2020-10-12 16:10:45,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:10:45,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:10:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:10:45,026 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 4 states. [2020-10-12 16:10:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:45,075 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-10-12 16:10:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:10:45,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-12 16:10:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:45,076 INFO L225 Difference]: With dead ends: 27 [2020-10-12 16:10:45,077 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:10:45,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:10:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:10:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-12 16:10:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:10:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-12 16:10:45,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-10-12 16:10:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:45,083 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-12 16:10:45,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:10:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-12 16:10:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:10:45,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:45,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:45,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:10:45,085 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash 870120472, now seen corresponding path program 1 times [2020-10-12 16:10:45,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:45,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655223712] [2020-10-12 16:10:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:45,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:45,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:10:45,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:45,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-12 16:10:45,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:45,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:10:45,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:45,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:10:45,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:45,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:45,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:45,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:45,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:45,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:45,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:45,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:45,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:45,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655223712] [2020-10-12 16:10:45,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:45,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:10:45,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194112481] [2020-10-12 16:10:45,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:10:45,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:45,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:10:45,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:45,481 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 8 states. [2020-10-12 16:10:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:45,615 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-12 16:10:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:10:45,615 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-12 16:10:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:45,616 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:10:45,616 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:10:45,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:10:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:10:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-12 16:10:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 16:10:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-12 16:10:45,623 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-10-12 16:10:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:45,623 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-12 16:10:45,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:10:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-12 16:10:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:10:45,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:45,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:45,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:10:45,625 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1652670274, now seen corresponding path program 1 times [2020-10-12 16:10:45,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:45,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705561280] [2020-10-12 16:10:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:45,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:10:45,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:45,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-12 16:10:45,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:10:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:10:45,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:45,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:45,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:45,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:45,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:45,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:45,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:45,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:10:45,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705561280] [2020-10-12 16:10:45,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:45,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:10:45,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660051007] [2020-10-12 16:10:45,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:10:45,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:45,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:10:45,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:10:45,785 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-12 16:10:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:45,812 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-12 16:10:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:10:45,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-12 16:10:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:45,815 INFO L225 Difference]: With dead ends: 26 [2020-10-12 16:10:45,815 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 16:10:45,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:10:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 16:10:45,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 16:10:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:10:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-12 16:10:45,829 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2020-10-12 16:10:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:45,830 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-12 16:10:45,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:10:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-12 16:10:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:10:45,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:45,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:45,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:10:45,832 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:45,833 INFO L82 PathProgramCache]: Analyzing trace with hash 342366825, now seen corresponding path program 1 times [2020-10-12 16:10:45,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:45,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132306391] [2020-10-12 16:10:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:45,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:46,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:46,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:10:46,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:46,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-12 16:10:46,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:46,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:10:46,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:46,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:10:46,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:46,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:46,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:46,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:46,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:46,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:46,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:10:46,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:46,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:46,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:46,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:46,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:46,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132306391] [2020-10-12 16:10:46,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:46,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:10:46,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183826967] [2020-10-12 16:10:46,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:10:46,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:46,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:10:46,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:10:46,502 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 10 states. [2020-10-12 16:10:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:46,879 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-10-12 16:10:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:10:46,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-12 16:10:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:46,881 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:10:46,881 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 16:10:46,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:10:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 16:10:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-10-12 16:10:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:10:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-12 16:10:46,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-10-12 16:10:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:46,889 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-12 16:10:46,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:10:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-12 16:10:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:10:46,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:46,890 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:46,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:10:46,890 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:46,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2058974750, now seen corresponding path program 2 times [2020-10-12 16:10:46,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:46,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104022865] [2020-10-12 16:10:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:46,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:46,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:47,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:10:47,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:47,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-12 16:10:47,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:47,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:10:47,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:10:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:10:47,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:47,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:47,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:47,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:47,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:47,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:47,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:47,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:10:47,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104022865] [2020-10-12 16:10:47,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:47,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:10:47,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593655358] [2020-10-12 16:10:47,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:10:47,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:10:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:10:47,128 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2020-10-12 16:10:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:47,187 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-10-12 16:10:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:47,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-12 16:10:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:47,188 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:10:47,188 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:10:47,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:10:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:10:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:10:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-12 16:10:47,195 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-10-12 16:10:47,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:47,196 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-12 16:10:47,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:10:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-12 16:10:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:10:47,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:47,197 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:47,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:10:47,198 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:47,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1697985137, now seen corresponding path program 3 times [2020-10-12 16:10:47,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:47,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588539909] [2020-10-12 16:10:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:47,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:47,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:10:47,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:47,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-12 16:10:47,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:47,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:10:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:10:47,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:47,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:47,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:47,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:47,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:47,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:10:47,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:47,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:47,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:47,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:47,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:10:47,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588539909] [2020-10-12 16:10:47,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:47,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:10:47,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477010646] [2020-10-12 16:10:47,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:10:47,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:47,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:10:47,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:10:47,668 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 9 states. [2020-10-12 16:10:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:47,848 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-12 16:10:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:10:47,849 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-12 16:10:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:47,849 INFO L225 Difference]: With dead ends: 30 [2020-10-12 16:10:47,850 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:10:47,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:10:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:10:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-12 16:10:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:10:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-12 16:10:47,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2020-10-12 16:10:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:47,855 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-12 16:10:47,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:10:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-12 16:10:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:10:47,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:47,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:47,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:10:47,857 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash -600793270, now seen corresponding path program 4 times [2020-10-12 16:10:47,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:47,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751722861] [2020-10-12 16:10:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:47,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:10:48,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:48,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-12 16:10:48,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:10:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:10:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:10:48,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:48,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:48,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:48,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:48,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:48,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:48,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:48,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:10:48,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751722861] [2020-10-12 16:10:48,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:48,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:10:48,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083042347] [2020-10-12 16:10:48,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:10:48,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:10:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:10:48,119 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-12 16:10:48,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:48,164 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-12 16:10:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:10:48,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-12 16:10:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:48,165 INFO L225 Difference]: With dead ends: 25 [2020-10-12 16:10:48,165 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:10:48,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:10:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 16:10:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:10:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-12 16:10:48,170 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2020-10-12 16:10:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:48,171 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-12 16:10:48,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:10:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-12 16:10:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:10:48,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:48,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:48,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:10:48,172 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:48,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1409184419, now seen corresponding path program 5 times [2020-10-12 16:10:48,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:48,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478321553] [2020-10-12 16:10:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:10:48,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:48,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-12 16:10:48,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:10:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:10:48,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:48,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:48,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:48,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:48,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:48,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:48,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:48,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478321553] [2020-10-12 16:10:48,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:48,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:10:48,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405290580] [2020-10-12 16:10:48,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:10:48,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:48,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:10:48,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:10:48,995 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 12 states. [2020-10-12 16:10:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:49,254 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-12 16:10:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:10:49,256 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-12 16:10:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:49,256 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:10:49,257 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:10:49,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:10:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:10:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-12 16:10:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:10:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-12 16:10:49,268 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2020-10-12 16:10:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:49,269 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-12 16:10:49,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:10:49,269 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-12 16:10:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:10:49,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:49,270 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:49,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:10:49,271 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:49,271 INFO L82 PathProgramCache]: Analyzing trace with hash -699506262, now seen corresponding path program 6 times [2020-10-12 16:10:49,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:49,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425194628] [2020-10-12 16:10:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:49,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:10:49,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:49,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-12 16:10:49,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:10:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:10:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:10:49,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:49,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:49,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:49,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:49,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:49,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:49,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:49,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:49,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:49,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:10:49,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425194628] [2020-10-12 16:10:49,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:49,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:10:49,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554512142] [2020-10-12 16:10:49,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:10:49,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:10:49,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:49,785 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-10-12 16:10:49,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:49,926 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-12 16:10:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:10:49,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 16:10:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:49,927 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:10:49,927 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:10:49,928 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 [2020-10-12 16:10:49,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:10:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:10:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:10:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-12 16:10:49,933 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-12 16:10:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:49,934 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-12 16:10:49,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:10:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-12 16:10:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:10:49,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:49,935 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:49,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:10:49,935 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:49,936 INFO L82 PathProgramCache]: Analyzing trace with hash 725212248, now seen corresponding path program 7 times [2020-10-12 16:10:49,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:49,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887163380] [2020-10-12 16:10:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:50,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:10:50,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:50,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-12 16:10:50,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:50,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:10:50,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:50,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:10:50,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:50,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:50,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:50,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:50,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:50,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:50,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:50,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:50,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:50,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:50,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:50,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887163380] [2020-10-12 16:10:50,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:50,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:10:50,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260692527] [2020-10-12 16:10:50,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:10:50,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:50,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:10:50,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:10:50,962 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 13 states. [2020-10-12 16:10:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:51,406 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-12 16:10:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:10:51,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-12 16:10:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:51,408 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:10:51,408 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:10:51,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:10:51,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:10:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-12 16:10:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:10:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-12 16:10:51,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-10-12 16:10:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:51,417 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-12 16:10:51,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:10:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-12 16:10:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:10:51,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:51,418 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:51,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:10:51,418 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:51,419 INFO L82 PathProgramCache]: Analyzing trace with hash 540641470, now seen corresponding path program 8 times [2020-10-12 16:10:51,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:51,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237956601] [2020-10-12 16:10:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:51,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:51,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:10:51,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-12 16:10:51,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:10:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:10:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:51,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:51,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:51,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:51,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:51,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:51,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:51,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:10:51,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237956601] [2020-10-12 16:10:51,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:51,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:10:51,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227190265] [2020-10-12 16:10:51,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:10:51,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:10:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:51,985 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-12 16:10:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:52,045 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-12 16:10:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:52,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-12 16:10:52,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:52,046 INFO L225 Difference]: With dead ends: 50 [2020-10-12 16:10:52,047 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 16:10:52,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 16:10:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-12 16:10:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:10:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-12 16:10:52,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2020-10-12 16:10:52,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:52,060 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-12 16:10:52,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:10:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-12 16:10:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:10:52,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:52,067 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:52,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:10:52,068 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1827967811, now seen corresponding path program 9 times [2020-10-12 16:10:52,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:52,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252313022] [2020-10-12 16:10:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:52,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:52,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:10:52,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:52,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-12 16:10:52,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:52,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:10:52,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:52,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:10:52,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:52,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:52,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:52,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:52,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:52,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:52,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:52,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:52,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:52,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:52,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:10:52,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252313022] [2020-10-12 16:10:52,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:52,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:10:52,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400833855] [2020-10-12 16:10:52,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:10:52,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:10:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:10:52,966 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 9 states. [2020-10-12 16:10:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:53,164 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-12 16:10:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:10:53,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-12 16:10:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:53,166 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:10:53,166 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:10:53,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:10:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:10:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 16:10:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:10:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-12 16:10:53,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2020-10-12 16:10:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:53,181 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-12 16:10:53,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:10:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-12 16:10:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:10:53,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:53,182 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:53,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:10:53,184 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash -384445847, now seen corresponding path program 10 times [2020-10-12 16:10:53,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:53,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765804509] [2020-10-12 16:10:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:53,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:53,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:10:53,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:53,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-12 16:10:53,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:53,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:10:53,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:53,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:10:53,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:54,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:54,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:54,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:54,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:54,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:54,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:10:54,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:54,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:54,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:54,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:54,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:54,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765804509] [2020-10-12 16:10:54,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:54,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:10:54,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292572330] [2020-10-12 16:10:54,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:10:54,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:54,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:10:54,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:10:54,246 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 14 states. [2020-10-12 16:10:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:56,802 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-12 16:10:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:10:56,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-12 16:10:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:56,803 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:10:56,803 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 16:10:56,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:10:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 16:10:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 16:10:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:10:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-12 16:10:56,811 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2020-10-12 16:10:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:56,811 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-12 16:10:56,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:10:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-12 16:10:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:10:56,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:56,813 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:56,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:10:56,813 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:56,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:56,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1298529031, now seen corresponding path program 11 times [2020-10-12 16:10:56,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:56,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722994151] [2020-10-12 16:10:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:56,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:56,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:56,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:57,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:57,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:10:57,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:57,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-12 16:10:57,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:57,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:10:57,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:57,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:10:57,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:57,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:57,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:57,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:57,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:57,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:57,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:57,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:57,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:57,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:57,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:57,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:10:57,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722994151] [2020-10-12 16:10:57,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:57,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:10:57,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109509792] [2020-10-12 16:10:57,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:10:57,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:57,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:10:57,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:10:57,691 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2020-10-12 16:10:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:57,884 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-12 16:10:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:10:57,884 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-12 16:10:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:57,885 INFO L225 Difference]: With dead ends: 44 [2020-10-12 16:10:57,885 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:10:57,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:10:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:10:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-12 16:10:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:10:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-12 16:10:57,895 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 22 [2020-10-12 16:10:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:57,895 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-12 16:10:57,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:10:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-12 16:10:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:10:57,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:57,896 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:57,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:10:57,897 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:57,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1816727582, now seen corresponding path program 12 times [2020-10-12 16:10:57,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:57,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875835103] [2020-10-12 16:10:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:57,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:58,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:10:58,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:58,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 973 [2020-10-12 16:10:58,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:10:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:10:58,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:59,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:59,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:59,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:59,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:59,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:59,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:59,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:10:59,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875835103] [2020-10-12 16:10:59,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:59,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:10:59,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729712079] [2020-10-12 16:10:59,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:10:59,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:59,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:10:59,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:10:59,061 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 12 states. [2020-10-12 16:10:59,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:59,364 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-10-12 16:10:59,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:10:59,364 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-12 16:10:59,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:59,366 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:10:59,366 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:10:59,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:10:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:10:59,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-12 16:10:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:10:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-12 16:10:59,383 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 23 [2020-10-12 16:10:59,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:59,384 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-12 16:10:59,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:10:59,384 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-12 16:10:59,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:10:59,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:59,385 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:59,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:10:59,386 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:59,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:59,386 INFO L82 PathProgramCache]: Analyzing trace with hash -394565223, now seen corresponding path program 13 times [2020-10-12 16:10:59,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:59,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289815478] [2020-10-12 16:10:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:59,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:00,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:00,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:00,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:00,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-12 16:11:00,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:11:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:11:00,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:00,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:00,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:00,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:00,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:00,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:00,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:00,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:00,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:00,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:00,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:00,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:00,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289815478] [2020-10-12 16:11:00,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:00,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:11:00,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031137557] [2020-10-12 16:11:00,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:11:00,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:11:00,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:00,666 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 13 states. [2020-10-12 16:11:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:01,059 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-10-12 16:11:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:11:01,060 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-12 16:11:01,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:01,061 INFO L225 Difference]: With dead ends: 66 [2020-10-12 16:11:01,061 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:11:01,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:11:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:11:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-10-12 16:11:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:11:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-10-12 16:11:01,096 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 24 [2020-10-12 16:11:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:01,097 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-10-12 16:11:01,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:11:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-10-12 16:11:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:01,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:01,100 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:01,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:11:01,101 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash 182109661, now seen corresponding path program 14 times [2020-10-12 16:11:01,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:01,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481261682] [2020-10-12 16:11:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:01,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:01,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:01,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:01,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:01,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:01,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-12 16:11:01,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:01,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:11:01,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:01,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:11:01,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:02,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:02,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:02,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:02,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:02,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:02,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:02,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:02,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:02,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:02,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:02,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:02,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481261682] [2020-10-12 16:11:02,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:02,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:11:02,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208647381] [2020-10-12 16:11:02,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:11:02,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:02,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:11:02,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:11:02,565 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 19 states. [2020-10-12 16:11:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:03,339 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-12 16:11:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:11:03,340 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2020-10-12 16:11:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:03,343 INFO L225 Difference]: With dead ends: 70 [2020-10-12 16:11:03,343 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 16:11:03,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:11:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 16:11:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-12 16:11:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:11:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-12 16:11:03,358 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 25 [2020-10-12 16:11:03,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:03,359 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-12 16:11:03,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:11:03,359 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-12 16:11:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:03,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:03,360 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:03,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:11:03,361 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash -225165442, now seen corresponding path program 15 times [2020-10-12 16:11:03,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:03,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884477465] [2020-10-12 16:11:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:03,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:03,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:03,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:04,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:04,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:04,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:04,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1198 [2020-10-12 16:11:04,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:04,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:11:04,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:04,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:11:04,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:04,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:04,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:04,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:04,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:04,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:04,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:04,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:04,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:04,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:04,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:04,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:04,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884477465] [2020-10-12 16:11:04,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:04,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:11:04,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231011623] [2020-10-12 16:11:04,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:11:04,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:04,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:11:04,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:11:04,866 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 14 states. [2020-10-12 16:11:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:05,365 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-10-12 16:11:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:11:05,366 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-12 16:11:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:05,367 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:11:05,367 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 16:11:05,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:11:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 16:11:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-12 16:11:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:11:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-12 16:11:05,383 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 25 [2020-10-12 16:11:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:05,383 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-12 16:11:05,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:11:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-12 16:11:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:11:05,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:05,385 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:05,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:11:05,385 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash 731260473, now seen corresponding path program 16 times [2020-10-12 16:11:05,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:05,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409760717] [2020-10-12 16:11:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:05,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:05,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:06,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:06,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:06,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:11:06,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:06,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-12 16:11:06,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:06,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:11:06,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:06,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:11:06,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:06,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:06,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:06,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:06,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:06,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:06,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:06,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:06,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:06,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:06,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409760717] [2020-10-12 16:11:06,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:06,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:11:06,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667003145] [2020-10-12 16:11:06,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:11:06,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:06,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:11:06,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:11:06,849 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 15 states. [2020-10-12 16:11:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:07,365 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2020-10-12 16:11:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:11:07,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-12 16:11:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:07,366 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:11:07,366 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 16:11:07,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:11:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 16:11:07,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2020-10-12 16:11:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:11:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-12 16:11:07,379 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 26 [2020-10-12 16:11:07,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:07,379 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-12 16:11:07,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:11:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-12 16:11:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:11:07,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:07,380 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:07,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:11:07,380 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash 970402255, now seen corresponding path program 17 times [2020-10-12 16:11:07,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:07,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189303052] [2020-10-12 16:11:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:07,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:09,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:09,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:11:09,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:09,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2281 [2020-10-12 16:11:09,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:09,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:11:09,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:09,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:11:09,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:10,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:10,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:10,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:10,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:10,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:10,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:11:10,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189303052] [2020-10-12 16:11:10,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:10,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:11:10,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496152454] [2020-10-12 16:11:10,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:11:10,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:10,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:11:10,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:11:10,075 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 17 states. [2020-10-12 16:11:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:11,855 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2020-10-12 16:11:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:11:11,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-12 16:11:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:11,856 INFO L225 Difference]: With dead ends: 88 [2020-10-12 16:11:11,856 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 16:11:11,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:11:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 16:11:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-12 16:11:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:11:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-12 16:11:11,869 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 27 [2020-10-12 16:11:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:11,869 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-12 16:11:11,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:11:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-12 16:11:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:11:11,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:11,870 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:11,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:11:11,870 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash 315692766, now seen corresponding path program 18 times [2020-10-12 16:11:11,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:11,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644493246] [2020-10-12 16:11:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:11,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:11,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:12,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:13,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:13,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:11:13,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:13,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1740 [2020-10-12 16:11:13,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:13,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:11:13,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:13,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:11:13,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:13,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:13,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:13,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:13,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:13,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:13,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:13,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:13,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:13,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:13,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:13,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:13,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644493246] [2020-10-12 16:11:13,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:13,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:11:13,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810855769] [2020-10-12 16:11:13,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:11:13,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:13,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:11:13,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:11:13,875 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 16 states. [2020-10-12 16:11:14,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:14,488 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2020-10-12 16:11:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:11:14,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-12 16:11:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:14,492 INFO L225 Difference]: With dead ends: 81 [2020-10-12 16:11:14,492 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:11:14,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:11:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:11:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-10-12 16:11:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 16:11:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-12 16:11:14,511 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 27 [2020-10-12 16:11:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:14,511 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-12 16:11:14,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:11:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-12 16:11:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:11:14,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:14,513 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:14,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:11:14,513 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash 317995737, now seen corresponding path program 19 times [2020-10-12 16:11:14,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:14,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162483619] [2020-10-12 16:11:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:14,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:14,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:14,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:16,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:11:16,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:16,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1617 [2020-10-12 16:11:16,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:16,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:11:16,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:16,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:11:16,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:16,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:16,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:16,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:16,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:16,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:16,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:16,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:16,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:16,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:16,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162483619] [2020-10-12 16:11:16,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:16,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:11:16,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860174111] [2020-10-12 16:11:16,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:11:16,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:11:16,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:11:16,420 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 17 states. [2020-10-12 16:11:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:17,098 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2020-10-12 16:11:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:11:17,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-12 16:11:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:17,100 INFO L225 Difference]: With dead ends: 90 [2020-10-12 16:11:17,100 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 16:11:17,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:11:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 16:11:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-10-12 16:11:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:11:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-10-12 16:11:17,113 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 28 [2020-10-12 16:11:17,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:17,113 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-10-12 16:11:17,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:11:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-10-12 16:11:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:11:17,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:17,114 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:17,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:11:17,114 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash 124628701, now seen corresponding path program 20 times [2020-10-12 16:11:17,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:17,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732788264] [2020-10-12 16:11:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:17,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:17,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:18,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:19,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:19,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:11:19,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:19,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1970 [2020-10-12 16:11:19,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:11:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:11:19,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:19,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:19,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:19,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:19,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:19,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:19,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:19,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:11:19,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732788264] [2020-10-12 16:11:19,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:19,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:11:19,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303656701] [2020-10-12 16:11:19,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:11:19,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:11:19,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:11:19,642 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 19 states. [2020-10-12 16:11:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:22,391 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-10-12 16:11:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:11:22,393 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-10-12 16:11:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:22,393 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:11:22,393 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:11:22,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:11:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:11:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-12 16:11:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 16:11:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-12 16:11:22,405 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 29 [2020-10-12 16:11:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:22,405 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-12 16:11:22,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:11:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-12 16:11:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:11:22,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:22,406 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:22,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:11:22,406 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:22,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:22,407 INFO L82 PathProgramCache]: Analyzing trace with hash 389387838, now seen corresponding path program 21 times [2020-10-12 16:11:22,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:22,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195643691] [2020-10-12 16:11:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:22,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:24,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:24,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:11:24,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:24,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1974 [2020-10-12 16:11:24,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:11:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:11:24,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:24,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:24,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:24,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:24,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:24,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:24,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:24,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:24,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:24,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:24,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195643691] [2020-10-12 16:11:24,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:24,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:11:24,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383181223] [2020-10-12 16:11:24,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:11:24,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:24,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:11:24,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:11:24,680 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 18 states. [2020-10-12 16:11:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:25,515 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2020-10-12 16:11:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:11:25,516 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-12 16:11:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:25,517 INFO L225 Difference]: With dead ends: 93 [2020-10-12 16:11:25,517 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:11:25,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:11:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:11:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-12 16:11:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:11:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-12 16:11:25,536 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 29 [2020-10-12 16:11:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:25,538 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-12 16:11:25,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:11:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-12 16:11:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:11:25,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:25,539 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:25,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:11:25,539 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:25,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1692424327, now seen corresponding path program 22 times [2020-10-12 16:11:25,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:25,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566559316] [2020-10-12 16:11:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:25,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:11:27,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:27,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1538 [2020-10-12 16:11:27,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:11:27,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:27,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:11:27,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:27,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:27,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:27,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:27,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:27,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:27,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:27,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:27,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566559316] [2020-10-12 16:11:27,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:27,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:11:27,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354246579] [2020-10-12 16:11:27,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:11:27,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:27,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:11:27,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:11:27,422 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 19 states. [2020-10-12 16:11:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:28,221 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2020-10-12 16:11:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:11:28,223 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-12 16:11:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:28,224 INFO L225 Difference]: With dead ends: 102 [2020-10-12 16:11:28,224 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 16:11:28,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:11:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 16:11:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2020-10-12 16:11:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 16:11:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-10-12 16:11:28,237 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 30 [2020-10-12 16:11:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:28,237 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-10-12 16:11:28,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:11:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-10-12 16:11:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:11:28,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:28,238 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:28,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:11:28,239 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash -507607473, now seen corresponding path program 23 times [2020-10-12 16:11:28,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:28,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092886741] [2020-10-12 16:11:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:28,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:30,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:30,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:11:30,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:30,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-12 16:11:30,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:30,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:11:30,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:30,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:11:30,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:37,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:37,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:37,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:37,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:37,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:37,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:37,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:37,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:11:37,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092886741] [2020-10-12 16:11:37,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:37,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:11:37,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142418968] [2020-10-12 16:11:37,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:11:37,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:11:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=378, Unknown=3, NotChecked=0, Total=420 [2020-10-12 16:11:37,575 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 21 states. [2020-10-12 16:11:50,862 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2020-10-12 16:11:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:50,937 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2020-10-12 16:11:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 16:11:50,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-10-12 16:11:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:50,938 INFO L225 Difference]: With dead ends: 134 [2020-10-12 16:11:50,938 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:11:50,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=331, Invalid=4496, Unknown=3, NotChecked=0, Total=4830 [2020-10-12 16:11:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:11:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-12 16:11:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 16:11:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-10-12 16:11:50,953 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 31 [2020-10-12 16:11:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:50,953 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-10-12 16:11:50,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:11:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-10-12 16:11:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:11:50,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:50,954 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:50,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:11:50,954 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:50,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1804092002, now seen corresponding path program 24 times [2020-10-12 16:11:50,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:50,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159043206] [2020-10-12 16:11:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:50,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:52,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:52,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:11:52,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:52,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1837 [2020-10-12 16:11:52,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:52,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:11:52,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:52,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:11:52,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:53,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:53,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:53,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:53,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:53,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:53,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:53,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:53,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:53,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:53,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:53,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159043206] [2020-10-12 16:11:53,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:53,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:11:53,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477758260] [2020-10-12 16:11:53,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:11:53,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:53,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:11:53,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:11:53,169 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 20 states. [2020-10-12 16:11:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:53,994 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2020-10-12 16:11:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:11:53,995 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-12 16:11:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:53,996 INFO L225 Difference]: With dead ends: 105 [2020-10-12 16:11:53,996 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:11:53,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:11:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:11:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2020-10-12 16:11:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:11:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-12 16:11:54,010 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 31 [2020-10-12 16:11:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:54,010 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-12 16:11:54,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:11:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-12 16:11:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:11:54,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:54,011 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:54,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:11:54,011 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:54,012 INFO L82 PathProgramCache]: Analyzing trace with hash -970822631, now seen corresponding path program 25 times [2020-10-12 16:11:54,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:54,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113534168] [2020-10-12 16:11:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:54,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:54,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:55,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:55,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:11:55,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:55,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-12 16:11:55,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:55,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:11:55,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:55,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:11:55,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:56,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:56,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:56,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:56,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:56,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:56,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:56,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:56,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:11:56,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113534168] [2020-10-12 16:11:56,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:56,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:11:56,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823287913] [2020-10-12 16:11:56,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:11:56,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:56,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:11:56,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:11:56,047 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 21 states. [2020-10-12 16:11:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:56,992 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2020-10-12 16:11:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:11:56,993 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-12 16:11:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:56,994 INFO L225 Difference]: With dead ends: 114 [2020-10-12 16:11:56,994 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 16:11:56,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:11:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 16:11:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2020-10-12 16:11:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:11:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-12 16:11:57,011 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 32 [2020-10-12 16:11:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:57,012 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-12 16:11:57,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:11:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-12 16:11:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:11:57,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:57,013 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:57,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:11:57,013 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:57,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1541122013, now seen corresponding path program 26 times [2020-10-12 16:11:57,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:57,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145538367] [2020-10-12 16:11:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:59,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:11:59,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:59,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2050 [2020-10-12 16:11:59,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:59,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:11:59,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:59,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:11:59,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:59,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:59,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:59,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:59,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:59,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:59,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:59,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:59,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:59,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:59,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:11:59,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145538367] [2020-10-12 16:11:59,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:59,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:11:59,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111733138] [2020-10-12 16:11:59,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:11:59,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:59,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:11:59,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:11:59,867 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 23 states. [2020-10-12 16:12:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:08,706 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-10-12 16:12:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-12 16:12:08,706 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2020-10-12 16:12:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:08,707 INFO L225 Difference]: With dead ends: 160 [2020-10-12 16:12:08,707 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:12:08,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=434, Invalid=7048, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:12:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:12:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-12 16:12:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 16:12:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-10-12 16:12:08,720 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 33 [2020-10-12 16:12:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:08,720 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-10-12 16:12:08,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:12:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-10-12 16:12:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:12:08,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:08,721 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:08,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:12:08,721 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash -909275906, now seen corresponding path program 27 times [2020-10-12 16:12:08,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:08,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075278431] [2020-10-12 16:12:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:08,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:11,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:11,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:12:11,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:11,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2707 [2020-10-12 16:12:11,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:11,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:12:11,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:11,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:12:11,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:11,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:11,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:11,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:11,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:11,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:11,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:11,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:11,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:11,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:11,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:11,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:11,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075278431] [2020-10-12 16:12:11,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:11,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:12:11,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896587567] [2020-10-12 16:12:11,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:12:11,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:12:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:12:11,992 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 22 states. [2020-10-12 16:12:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:12,991 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2020-10-12 16:12:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:12:12,992 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-12 16:12:12,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:12,993 INFO L225 Difference]: With dead ends: 117 [2020-10-12 16:12:12,993 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 16:12:12,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:12:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 16:12:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 93. [2020-10-12 16:12:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:12:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-10-12 16:12:13,007 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 33 [2020-10-12 16:12:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:13,008 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-10-12 16:12:13,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:12:13,008 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-10-12 16:12:13,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:12:13,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:13,008 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:13,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:12:13,009 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash 998672569, now seen corresponding path program 28 times [2020-10-12 16:12:13,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:13,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357067632] [2020-10-12 16:12:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:13,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:13,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:13,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:15,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:15,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:12:15,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:15,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2521 [2020-10-12 16:12:15,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:12:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:12:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:16,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:16,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:16,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:16,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:16,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:16,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:16,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:16,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:16,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357067632] [2020-10-12 16:12:16,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:16,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:12:16,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872998463] [2020-10-12 16:12:16,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:12:16,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:16,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:12:16,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:12:16,019 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 23 states. [2020-10-12 16:12:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:17,059 INFO L93 Difference]: Finished difference Result 126 states and 160 transitions. [2020-10-12 16:12:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:12:17,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-12 16:12:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:17,061 INFO L225 Difference]: With dead ends: 126 [2020-10-12 16:12:17,062 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 16:12:17,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:12:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 16:12:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2020-10-12 16:12:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 16:12:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2020-10-12 16:12:17,074 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 34 [2020-10-12 16:12:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:17,074 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2020-10-12 16:12:17,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:12:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2020-10-12 16:12:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:12:17,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:17,075 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:17,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:12:17,075 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:17,075 INFO L82 PathProgramCache]: Analyzing trace with hash -417459505, now seen corresponding path program 29 times [2020-10-12 16:12:17,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:17,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793121929] [2020-10-12 16:12:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:17,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:17,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:18,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:21,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:12:21,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:21,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3956 [2020-10-12 16:12:21,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:21,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:12:21,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:12:21,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:22,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:22,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:22,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:22,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:22,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:22,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:22,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:22,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:22,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:22,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:22,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:22,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793121929] [2020-10-12 16:12:22,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:22,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:12:22,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185197041] [2020-10-12 16:12:22,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:12:22,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:22,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:12:22,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:12:22,577 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 25 states. [2020-10-12 16:12:23,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:23,360 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2020-10-12 16:12:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:12:23,361 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2020-10-12 16:12:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:23,362 INFO L225 Difference]: With dead ends: 116 [2020-10-12 16:12:23,363 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 16:12:23,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:12:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 16:12:23,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-12 16:12:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:12:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2020-10-12 16:12:23,376 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 35 [2020-10-12 16:12:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:23,376 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2020-10-12 16:12:23,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:12:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2020-10-12 16:12:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:12:23,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:23,377 INFO L422 BasicCegarLoop]: trace histogram [17, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:23,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:12:23,378 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash 15533150, now seen corresponding path program 30 times [2020-10-12 16:12:23,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:23,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668826804] [2020-10-12 16:12:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:23,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:23,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:24,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:26,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:26,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:12:26,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:26,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2754 [2020-10-12 16:12:26,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:26,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:12:26,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:26,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:12:26,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:26,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:26,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:26,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:26,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:26,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:26,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:26,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:26,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:26,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:26,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:26,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:26,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668826804] [2020-10-12 16:12:26,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:26,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:12:26,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006963879] [2020-10-12 16:12:26,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:12:26,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:12:26,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:12:26,803 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand 24 states. [2020-10-12 16:12:27,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:27,957 INFO L93 Difference]: Finished difference Result 129 states and 164 transitions. [2020-10-12 16:12:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:12:27,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-12 16:12:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:27,960 INFO L225 Difference]: With dead ends: 129 [2020-10-12 16:12:27,960 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 16:12:27,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:12:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 16:12:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-12 16:12:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 16:12:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2020-10-12 16:12:27,974 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 35 [2020-10-12 16:12:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:27,974 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2020-10-12 16:12:27,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:12:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2020-10-12 16:12:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:12:27,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:27,974 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:27,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:12:27,975 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash -397017767, now seen corresponding path program 31 times [2020-10-12 16:12:27,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:27,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662640861] [2020-10-12 16:12:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:27,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:28,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:28,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:30,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:30,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:12:30,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:30,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2780 [2020-10-12 16:12:30,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:30,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:12:30,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:30,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:12:30,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:31,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:31,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:31,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:31,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:31,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:31,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:31,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:31,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:31,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662640861] [2020-10-12 16:12:31,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:31,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:12:31,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624219407] [2020-10-12 16:12:31,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:12:31,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:31,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:12:31,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:12:31,328 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 25 states. [2020-10-12 16:12:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:32,533 INFO L93 Difference]: Finished difference Result 138 states and 176 transitions. [2020-10-12 16:12:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:12:32,534 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-12 16:12:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:32,535 INFO L225 Difference]: With dead ends: 138 [2020-10-12 16:12:32,536 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 16:12:32,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:12:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 16:12:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2020-10-12 16:12:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 16:12:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2020-10-12 16:12:32,554 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 36 [2020-10-12 16:12:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:32,554 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2020-10-12 16:12:32,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:12:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2020-10-12 16:12:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:12:32,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:32,555 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:32,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:12:32,556 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 75018461, now seen corresponding path program 32 times [2020-10-12 16:12:32,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:32,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31673693] [2020-10-12 16:12:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:32,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:36,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:36,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:12:36,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:36,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4207 [2020-10-12 16:12:36,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:36,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:12:36,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:36,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:12:36,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:37,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:37,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:37,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:37,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:37,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:37,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:37,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:37,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:37,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:37,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:37,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:37,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31673693] [2020-10-12 16:12:37,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:37,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:12:37,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055974121] [2020-10-12 16:12:37,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:12:37,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:37,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:12:37,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:12:37,761 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand 27 states. [2020-10-12 16:12:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:52,964 INFO L93 Difference]: Finished difference Result 218 states and 244 transitions. [2020-10-12 16:12:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-12 16:12:52,964 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 37 [2020-10-12 16:12:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:52,965 INFO L225 Difference]: With dead ends: 218 [2020-10-12 16:12:52,965 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 16:12:52,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4871 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=682, Invalid=15319, Unknown=1, NotChecked=0, Total=16002 [2020-10-12 16:12:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 16:12:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-12 16:12:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 16:12:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-10-12 16:12:52,983 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 37 [2020-10-12 16:12:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:52,983 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-10-12 16:12:52,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:12:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-10-12 16:12:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:12:52,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:52,984 INFO L422 BasicCegarLoop]: trace histogram [19, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:52,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:12:52,984 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:52,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:52,984 INFO L82 PathProgramCache]: Analyzing trace with hash -301194306, now seen corresponding path program 33 times [2020-10-12 16:12:52,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:52,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739239711] [2020-10-12 16:12:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:53,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:57,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:57,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:12:57,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4163 [2020-10-12 16:12:57,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:12:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:12:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:58,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:58,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:58,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:58,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:58,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:58,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739239711] [2020-10-12 16:12:58,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:58,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:12:58,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388800488] [2020-10-12 16:12:58,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:12:58,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:58,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:12:58,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:12:58,076 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 26 states. [2020-10-12 16:12:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:59,722 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2020-10-12 16:12:59,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:12:59,723 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-12 16:12:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:59,724 INFO L225 Difference]: With dead ends: 141 [2020-10-12 16:12:59,724 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 16:12:59,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:12:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 16:12:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 113. [2020-10-12 16:12:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 16:12:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2020-10-12 16:12:59,744 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 37 [2020-10-12 16:12:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:59,744 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2020-10-12 16:12:59,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:12:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2020-10-12 16:12:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:12:59,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:59,745 INFO L422 BasicCegarLoop]: trace histogram [20, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:59,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:12:59,745 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:59,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1625634311, now seen corresponding path program 34 times [2020-10-12 16:12:59,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:59,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287667747] [2020-10-12 16:12:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:59,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:04,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:13:04,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:04,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4254 [2020-10-12 16:13:04,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:13:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:13:04,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:04,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:04,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:04,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:04,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:04,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:13:04,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287667747] [2020-10-12 16:13:04,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:04,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:13:04,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515827265] [2020-10-12 16:13:04,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:13:04,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:13:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:13:04,912 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand 27 states. [2020-10-12 16:13:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:06,397 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2020-10-12 16:13:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:13:06,398 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-12 16:13:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:06,399 INFO L225 Difference]: With dead ends: 150 [2020-10-12 16:13:06,399 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 16:13:06,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:13:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 16:13:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2020-10-12 16:13:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 16:13:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-12 16:13:06,419 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 38 [2020-10-12 16:13:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:06,419 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-12 16:13:06,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:13:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-12 16:13:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:13:06,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:06,420 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:06,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:13:06,420 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash -41824433, now seen corresponding path program 35 times [2020-10-12 16:13:06,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:06,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153261641] [2020-10-12 16:13:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:11,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:13:11,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:11,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4994 [2020-10-12 16:13:11,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:11,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:13:11,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:11,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:13:11,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:12,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:12,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:12,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:12,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:12,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:12,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:12,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:12,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:12,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:12,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:12,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:13:12,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153261641] [2020-10-12 16:13:12,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:12,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:13:12,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795607770] [2020-10-12 16:13:12,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:13:12,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:13:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:13:12,750 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 29 states. [2020-10-12 16:13:34,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:34,648 INFO L93 Difference]: Finished difference Result 250 states and 279 transitions. [2020-10-12 16:13:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-10-12 16:13:34,648 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 39 [2020-10-12 16:13:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:34,649 INFO L225 Difference]: With dead ends: 250 [2020-10-12 16:13:34,649 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 16:13:34,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7164 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=827, Invalid=21523, Unknown=0, NotChecked=0, Total=22350 [2020-10-12 16:13:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 16:13:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-12 16:13:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 16:13:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2020-10-12 16:13:34,673 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 39 [2020-10-12 16:13:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:34,673 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2020-10-12 16:13:34,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:13:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2020-10-12 16:13:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:13:34,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:34,674 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:34,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:13:34,675 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:34,675 INFO L82 PathProgramCache]: Analyzing trace with hash 266398494, now seen corresponding path program 36 times [2020-10-12 16:13:34,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:34,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40153173] [2020-10-12 16:13:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:34,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:34,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:35,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:39,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:39,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:13:39,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:39,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4991 [2020-10-12 16:13:39,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:39,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:13:39,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:39,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:13:39,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:40,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:40,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:40,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:40,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:40,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:40,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:40,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:40,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:40,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:40,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:40,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:13:40,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40153173] [2020-10-12 16:13:40,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:40,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:13:40,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838862895] [2020-10-12 16:13:40,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:13:40,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:40,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:13:40,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:13:40,857 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand 28 states. [2020-10-12 16:13:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:42,615 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2020-10-12 16:13:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:13:42,616 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-12 16:13:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:42,617 INFO L225 Difference]: With dead ends: 153 [2020-10-12 16:13:42,617 INFO L226 Difference]: Without dead ends: 145 [2020-10-12 16:13:42,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:13:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-12 16:13:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2020-10-12 16:13:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 16:13:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2020-10-12 16:13:42,632 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 39 [2020-10-12 16:13:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:42,632 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2020-10-12 16:13:42,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:13:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2020-10-12 16:13:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:13:42,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:42,633 INFO L422 BasicCegarLoop]: trace histogram [22, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:42,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:13:42,633 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:42,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:42,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1210126695, now seen corresponding path program 37 times [2020-10-12 16:13:42,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:42,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182437857] [2020-10-12 16:13:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:42,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:42,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:47,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:47,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:13:47,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:47,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 16:13:47,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:47,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:13:47,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:47,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:13:47,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:48,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:48,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:48,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:48,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:48,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:48,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:48,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:48,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:13:48,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182437857] [2020-10-12 16:13:48,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:48,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:13:48,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990554547] [2020-10-12 16:13:48,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:13:48,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:48,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:13:48,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=754, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:13:48,933 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand 29 states. [2020-10-12 16:13:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:50,943 INFO L93 Difference]: Finished difference Result 162 states and 208 transitions. [2020-10-12 16:13:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:13:50,944 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-10-12 16:13:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:50,946 INFO L225 Difference]: With dead ends: 162 [2020-10-12 16:13:50,946 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 16:13:50,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:13:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 16:13:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 131. [2020-10-12 16:13:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 16:13:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2020-10-12 16:13:50,965 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 40 [2020-10-12 16:13:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:50,965 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2020-10-12 16:13:50,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:13:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2020-10-12 16:13:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 16:13:50,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:50,966 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:50,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:13:50,966 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:50,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:50,966 INFO L82 PathProgramCache]: Analyzing trace with hash 211339741, now seen corresponding path program 38 times [2020-10-12 16:13:50,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:50,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438144662] [2020-10-12 16:13:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:50,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:51,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:52,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:55,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:55,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:13:55,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:55,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:13:55,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:55,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:13:55,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:55,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:13:55,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:58,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:58,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:58,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:58,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:58,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:58,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:58,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:58,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:58,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:58,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:58,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:13:58,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438144662] [2020-10-12 16:13:58,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:58,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:13:58,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866279803] [2020-10-12 16:13:58,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:13:58,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:58,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:13:58,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:13:58,170 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand 31 states.