/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/float-benchs/Muller_Kahan.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:29:18,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:29:18,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:29:18,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:29:18,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:29:18,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:29:18,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:29:18,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:29:18,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:29:18,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:29:18,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:29:18,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:29:18,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:29:18,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:29:18,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:29:18,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:29:18,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:29:18,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:29:18,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:29:18,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:29:18,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:29:18,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:29:18,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:29:18,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:29:18,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:29:18,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:29:18,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:29:18,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:29:18,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:29:18,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:29:18,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:29:18,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:29:18,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:29:18,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:29:18,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:29:18,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:29:18,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:29:18,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:29:18,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:29:18,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:29:18,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:29:18,366 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 15:29:18,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:29:18,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:29:18,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:29:18,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:29:18,392 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:29:18,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:29:18,393 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:29:18,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:29:18,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:29:18,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:29:18,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:29:18,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:29:18,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:29:18,394 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:29:18,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:29:18,395 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:29:18,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:29:18,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:29:18,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:29:18,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:29:18,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:29:18,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:29:18,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:29:18,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:29:18,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:29:18,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:29:18,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:29:18,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:29:18,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:29:18,403 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 15:29:18,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:29:18,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:29:18,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:29:18,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:29:18,769 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:29:18,773 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-10-12 15:29:18,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66a306aec/360c15ee835d4289804fb88c441a1e8e/FLAG8ff317eb7 [2020-10-12 15:29:19,367 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:29:19,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-10-12 15:29:19,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66a306aec/360c15ee835d4289804fb88c441a1e8e/FLAG8ff317eb7 [2020-10-12 15:29:19,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66a306aec/360c15ee835d4289804fb88c441a1e8e [2020-10-12 15:29:19,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:29:19,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:29:19,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:29:19,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:29:19,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:29:19,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:29:19" (1/1) ... [2020-10-12 15:29:19,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19, skipping insertion in model container [2020-10-12 15:29:19,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:29:19" (1/1) ... [2020-10-12 15:29:19,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:29:19,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:29:19,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:29:19,951 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:29:19,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:29:19,985 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:29:19,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19 WrapperNode [2020-10-12 15:29:19,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:29:19,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:29:19,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:29:19,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:29:19,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19" (1/1) ... [2020-10-12 15:29:19,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19" (1/1) ... [2020-10-12 15:29:20,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19" (1/1) ... [2020-10-12 15:29:20,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19" (1/1) ... [2020-10-12 15:29:20,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19" (1/1) ... [2020-10-12 15:29:20,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19" (1/1) ... [2020-10-12 15:29:20,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19" (1/1) ... [2020-10-12 15:29:20,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:29:20,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:29:20,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:29:20,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:29:20,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19" (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 15:29:20,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:29:20,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:29:20,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 15:29:20,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:29:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:29:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 15:29:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:29:20,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:29:20,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:29:20,397 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:29:20,397 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 15:29:20,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:29:20 BoogieIcfgContainer [2020-10-12 15:29:20,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:29:20,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:29:20,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:29:20,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:29:20,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:29:19" (1/3) ... [2020-10-12 15:29:20,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422c48ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:29:20, skipping insertion in model container [2020-10-12 15:29:20,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:29:19" (2/3) ... [2020-10-12 15:29:20,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422c48ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:29:20, skipping insertion in model container [2020-10-12 15:29:20,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:29:20" (3/3) ... [2020-10-12 15:29:20,413 INFO L109 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2020-10-12 15:29:20,426 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:29:20,435 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:29:20,451 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:29:20,478 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:29:20,478 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:29:20,478 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:29:20,478 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:29:20,479 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:29:20,479 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:29:20,479 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:29:20,479 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:29:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-12 15:29:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 15:29:20,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:20,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:20,506 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2020-10-12 15:29:20,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:20,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958682638] [2020-10-12 15:29:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:20,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:20,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:20,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:29:20,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:20,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 15:29:20,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:20,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:20,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:29:20,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:20,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:29:20,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:20,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:20,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:20,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:20,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:20,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:29:20,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:20,708 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 15:29:20,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958682638] [2020-10-12 15:29:20,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:29:20,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-12 15:29:20,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454013028] [2020-10-12 15:29:20,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-12 15:29:20,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-12 15:29:20,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-12 15:29:20,744 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-12 15:29:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:20,776 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-12 15:29:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-12 15:29:20,778 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-12 15:29:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:20,790 INFO L225 Difference]: With dead ends: 31 [2020-10-12 15:29:20,790 INFO L226 Difference]: Without dead ends: 12 [2020-10-12 15:29:20,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-12 15:29:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-12 15:29:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-12 15:29:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-12 15:29:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-12 15:29:20,848 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-12 15:29:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:20,849 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-12 15:29:20,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-12 15:29:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-12 15:29:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 15:29:20,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:20,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:20,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:29:20,851 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1877050693, now seen corresponding path program 1 times [2020-10-12 15:29:20,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:20,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261876631] [2020-10-12 15:29:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:20,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:20,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:20,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:29:20,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:20,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 15:29:20,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:20,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:29:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:29:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:20,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:20,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:20,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:20,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:20,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:20,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:29:20,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:20,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:20,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:20,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:20,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:20,961 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 15:29:20,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261876631] [2020-10-12 15:29:20,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:29:20,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 15:29:20,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561072311] [2020-10-12 15:29:20,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 15:29:20,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 15:29:20,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 15:29:20,967 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-10-12 15:29:20,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:20,990 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-12 15:29:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 15:29:20,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-12 15:29:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:20,992 INFO L225 Difference]: With dead ends: 19 [2020-10-12 15:29:20,993 INFO L226 Difference]: Without dead ends: 14 [2020-10-12 15:29:20,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 15:29:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-12 15:29:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-12 15:29:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-12 15:29:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-12 15:29:21,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-10-12 15:29:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:21,003 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-12 15:29:21,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 15:29:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-12 15:29:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 15:29:21,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:21,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:21,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:29:21,005 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:21,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1175909113, now seen corresponding path program 1 times [2020-10-12 15:29:21,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:21,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873251916] [2020-10-12 15:29:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:21,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:21,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:21,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:29:21,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:21,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-12 15:29:21,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:29:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:21,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:29:21,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:21,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:21,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:21,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:21,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:29:21,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:21,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:21,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:21,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:21,127 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 15:29:21,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873251916] [2020-10-12 15:29:21,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:21,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 15:29:21,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623348663] [2020-10-12 15:29:21,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:29:21,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:21,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:29:21,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:29:21,133 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-12 15:29:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:21,323 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-12 15:29:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 15:29:21,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-12 15:29:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:21,331 INFO L225 Difference]: With dead ends: 21 [2020-10-12 15:29:21,331 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 15:29:21,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:29:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 15:29:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-12 15:29:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 15:29:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-12 15:29:21,345 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-12 15:29:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:21,345 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-12 15:29:21,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:29:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-12 15:29:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 15:29:21,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:21,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:21,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:29:21,351 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1607619511, now seen corresponding path program 2 times [2020-10-12 15:29:21,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:21,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898505857] [2020-10-12 15:29:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:21,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:21,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:21,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:29:21,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:21,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-12 15:29:21,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:21,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:29:21,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:29:21,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:29:21,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:21,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:21,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:21,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:21,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:21,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:21,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:21,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:21,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:21,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:21,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:21,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898505857] [2020-10-12 15:29:21,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:21,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 15:29:21,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496417137] [2020-10-12 15:29:21,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:29:21,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:29:21,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:29:21,563 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-12 15:29:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:21,597 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-12 15:29:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:29:21,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-12 15:29:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:21,599 INFO L225 Difference]: With dead ends: 23 [2020-10-12 15:29:21,599 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 15:29:21,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:29:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 15:29:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-12 15:29:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 15:29:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-12 15:29:21,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-12 15:29:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:21,606 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-12 15:29:21,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:29:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-12 15:29:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 15:29:21,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:21,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:21,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:29:21,608 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash -130515723, now seen corresponding path program 3 times [2020-10-12 15:29:21,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:21,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350583400] [2020-10-12 15:29:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:21,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:21,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:21,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:29:21,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:21,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-12 15:29:21,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:21,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:29:21,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:21,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:29:21,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 15:29:21,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:21,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:21,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:21,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:21,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:29:21,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:21,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:21,860 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 15:29:21,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350583400] [2020-10-12 15:29:21,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:21,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:29:21,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542845853] [2020-10-12 15:29:21,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:29:21,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:21,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:29:21,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:29:21,864 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-12 15:29:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:21,907 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-12 15:29:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:29:21,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-12 15:29:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:21,912 INFO L225 Difference]: With dead ends: 25 [2020-10-12 15:29:21,912 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 15:29:21,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:29:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 15:29:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-12 15:29:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 15:29:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-12 15:29:21,921 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-12 15:29:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:21,922 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-12 15:29:21,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:29:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-12 15:29:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:29:21,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:21,923 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:21,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:29:21,924 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash 263802547, now seen corresponding path program 4 times [2020-10-12 15:29:21,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:21,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761316817] [2020-10-12 15:29:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:21,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:22,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:22,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:29:22,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:22,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-12 15:29:22,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:22,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:29:22,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:22,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:29:22,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:22,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:22,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:22,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:22,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:22,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:22,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:22,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:22,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:22,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:22,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:22,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:22,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761316817] [2020-10-12 15:29:22,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:22,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:29:22,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700208829] [2020-10-12 15:29:22,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:29:22,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:22,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:29:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:29:22,115 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-12 15:29:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:22,158 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-12 15:29:22,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:29:22,159 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-12 15:29:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:22,160 INFO L225 Difference]: With dead ends: 27 [2020-10-12 15:29:22,160 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 15:29:22,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:29:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 15:29:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-12 15:29:22,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 15:29:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-12 15:29:22,173 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-12 15:29:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:22,174 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-12 15:29:22,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:29:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-12 15:29:22,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:29:22,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:22,179 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:22,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:29:22,179 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:22,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1246537969, now seen corresponding path program 5 times [2020-10-12 15:29:22,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:22,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712343766] [2020-10-12 15:29:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:22,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:22,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:22,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:29:22,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:22,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-12 15:29:22,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:22,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:29:22,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:22,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:29:22,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:22,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:22,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:22,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:22,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:22,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:22,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:29:22,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:22,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:22,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712343766] [2020-10-12 15:29:22,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:22,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:29:22,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101500112] [2020-10-12 15:29:22,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:29:22,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:22,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:29:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:29:22,475 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-12 15:29:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:22,526 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-12 15:29:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:29:22,527 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 15:29:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:22,528 INFO L225 Difference]: With dead ends: 29 [2020-10-12 15:29:22,528 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 15:29:22,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:29:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 15:29:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-12 15:29:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 15:29:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-12 15:29:22,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-12 15:29:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:22,536 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-12 15:29:22,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:29:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-12 15:29:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:29:22,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:22,537 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:22,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:29:22,538 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:22,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:22,538 INFO L82 PathProgramCache]: Analyzing trace with hash 762473391, now seen corresponding path program 6 times [2020-10-12 15:29:22,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:22,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946343437] [2020-10-12 15:29:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:22,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:22,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:22,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:29:22,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:22,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-12 15:29:22,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:22,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:29:22,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:22,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:29:22,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:22,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:22,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:22,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:22,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:22,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:22,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:22,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:22,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946343437] [2020-10-12 15:29:22,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:22,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:29:22,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603485499] [2020-10-12 15:29:22,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:29:22,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:29:22,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:29:22,718 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-12 15:29:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:22,761 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-12 15:29:22,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:29:22,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 15:29:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:22,763 INFO L225 Difference]: With dead ends: 31 [2020-10-12 15:29:22,763 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 15:29:22,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:29:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 15:29:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-12 15:29:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 15:29:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-12 15:29:22,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-12 15:29:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:22,770 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-12 15:29:22,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:29:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-12 15:29:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:29:22,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:22,772 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:22,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:29:22,772 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash -567118099, now seen corresponding path program 7 times [2020-10-12 15:29:22,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:22,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137055484] [2020-10-12 15:29:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:22,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:22,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:29:22,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:22,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-12 15:29:22,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:22,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:29:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:29:22,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:23,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:23,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:23,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:23,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:23,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:23,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:23,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:23,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:23,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:23,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:23,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:23,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137055484] [2020-10-12 15:29:23,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:23,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:29:23,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518614748] [2020-10-12 15:29:23,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:29:23,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:23,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:29:23,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:29:23,026 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-12 15:29:23,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:23,093 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-12 15:29:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:29:23,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 15:29:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:23,097 INFO L225 Difference]: With dead ends: 33 [2020-10-12 15:29:23,097 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 15:29:23,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:29:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 15:29:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-12 15:29:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 15:29:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-12 15:29:23,109 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-12 15:29:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:23,112 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-12 15:29:23,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:29:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-12 15:29:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 15:29:23,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:23,113 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:23,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:29:23,114 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1595714219, now seen corresponding path program 8 times [2020-10-12 15:29:23,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:23,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010136852] [2020-10-12 15:29:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:23,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:23,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:23,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:29:23,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:23,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-12 15:29:23,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:23,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:29:23,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:23,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:29:23,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:23,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:23,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:23,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:23,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:23,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:23,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:23,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:23,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:23,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:23,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:23,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:23,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010136852] [2020-10-12 15:29:23,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:23,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:29:23,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294962733] [2020-10-12 15:29:23,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:29:23,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:23,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:29:23,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:29:23,403 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-12 15:29:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:23,490 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-12 15:29:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:29:23,491 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-12 15:29:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:23,492 INFO L225 Difference]: With dead ends: 35 [2020-10-12 15:29:23,492 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 15:29:23,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:29:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 15:29:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-12 15:29:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 15:29:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-12 15:29:23,510 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-12 15:29:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:23,512 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-12 15:29:23,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:29:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-12 15:29:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:29:23,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:23,515 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:23,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:29:23,515 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:23,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1313400553, now seen corresponding path program 9 times [2020-10-12 15:29:23,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:23,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026535638] [2020-10-12 15:29:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:23,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:23,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:23,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:29:23,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:23,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-12 15:29:23,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:23,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:29:23,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:23,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:29:23,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:23,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:23,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:23,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:23,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:23,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:23,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:23,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:23,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:23,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:23,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:23,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:23,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026535638] [2020-10-12 15:29:23,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:23,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:29:23,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307261483] [2020-10-12 15:29:23,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:29:23,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:23,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:29:23,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:29:23,799 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-12 15:29:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:23,857 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-12 15:29:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:29:23,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:29:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:23,859 INFO L225 Difference]: With dead ends: 37 [2020-10-12 15:29:23,859 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 15:29:23,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:29:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 15:29:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-12 15:29:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 15:29:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-12 15:29:23,866 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-12 15:29:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:23,866 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-12 15:29:23,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:29:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-12 15:29:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:29:23,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:23,868 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:23,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:29:23,868 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:23,869 INFO L82 PathProgramCache]: Analyzing trace with hash 592907175, now seen corresponding path program 10 times [2020-10-12 15:29:23,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:23,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794293039] [2020-10-12 15:29:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:23,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:24,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:24,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:29:24,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:24,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-12 15:29:24,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:24,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:29:24,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:24,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:29:24,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:24,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:24,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:24,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:24,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:24,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:24,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:24,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:24,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:24,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794293039] [2020-10-12 15:29:24,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:24,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:29:24,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408776364] [2020-10-12 15:29:24,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:29:24,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:24,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:29:24,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:29:24,182 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-12 15:29:24,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:24,254 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-12 15:29:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:29:24,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-12 15:29:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:24,256 INFO L225 Difference]: With dead ends: 39 [2020-10-12 15:29:24,256 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 15:29:24,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:29:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 15:29:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-12 15:29:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 15:29:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-12 15:29:24,267 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-12 15:29:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:24,267 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-12 15:29:24,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:29:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-12 15:29:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:29:24,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:24,268 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:24,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:29:24,269 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:24,269 INFO L82 PathProgramCache]: Analyzing trace with hash -311494427, now seen corresponding path program 11 times [2020-10-12 15:29:24,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:24,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230628765] [2020-10-12 15:29:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:24,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:24,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:24,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:29:24,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:24,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-12 15:29:24,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:29:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:29:24,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:24,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:24,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:24,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:24,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:24,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:24,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:24,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:24,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:24,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:24,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:24,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:24,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230628765] [2020-10-12 15:29:24,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:24,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:29:24,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237219042] [2020-10-12 15:29:24,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:29:24,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:24,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:29:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:29:24,590 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-12 15:29:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:24,654 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-12 15:29:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:29:24,654 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-12 15:29:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:24,655 INFO L225 Difference]: With dead ends: 41 [2020-10-12 15:29:24,656 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 15:29:24,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:29:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 15:29:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-12 15:29:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 15:29:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-12 15:29:24,662 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-12 15:29:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:24,663 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-12 15:29:24,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:29:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-12 15:29:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:29:24,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:24,664 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:24,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:29:24,665 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:24,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:24,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1858040157, now seen corresponding path program 12 times [2020-10-12 15:29:24,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:24,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377241723] [2020-10-12 15:29:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:24,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:24,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:24,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:29:24,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:24,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-12 15:29:24,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:24,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:29:24,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:24,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:29:24,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:25,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:25,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:25,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:25,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:25,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:25,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:25,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:25,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:25,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:25,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:25,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:25,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377241723] [2020-10-12 15:29:25,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:25,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:29:25,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410568819] [2020-10-12 15:29:25,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:29:25,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:25,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:29:25,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:29:25,026 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-12 15:29:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:25,088 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-12 15:29:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:29:25,089 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 15:29:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:25,090 INFO L225 Difference]: With dead ends: 43 [2020-10-12 15:29:25,090 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 15:29:25,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:29:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 15:29:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-12 15:29:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 15:29:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-12 15:29:25,096 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-12 15:29:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:25,096 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-12 15:29:25,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:29:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-12 15:29:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:29:25,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:25,098 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:25,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:29:25,099 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2029802271, now seen corresponding path program 13 times [2020-10-12 15:29:25,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:25,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067426618] [2020-10-12 15:29:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:25,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:25,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:25,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:29:25,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:25,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-12 15:29:25,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:25,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:29:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:29:25,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:25,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:25,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:25,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:25,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:25,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:25,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:25,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:25,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:25,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:25,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:25,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:25,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067426618] [2020-10-12 15:29:25,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:25,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:29:25,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073623478] [2020-10-12 15:29:25,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:29:25,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:25,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:29:25,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:29:25,488 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-12 15:29:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:25,560 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-12 15:29:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:29:25,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-12 15:29:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:25,561 INFO L225 Difference]: With dead ends: 45 [2020-10-12 15:29:25,562 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 15:29:25,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:29:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 15:29:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-12 15:29:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 15:29:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-12 15:29:25,569 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-12 15:29:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:25,569 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-12 15:29:25,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:29:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-12 15:29:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:29:25,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:25,571 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:25,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:29:25,571 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash 410530719, now seen corresponding path program 14 times [2020-10-12 15:29:25,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:25,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806604180] [2020-10-12 15:29:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:25,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:25,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:25,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:29:25,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:25,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-12 15:29:25,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:25,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:29:25,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:25,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:29:25,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:25,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:25,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:25,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:25,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:25,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:25,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:25,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:25,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:25,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806604180] [2020-10-12 15:29:25,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:25,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:29:25,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919520213] [2020-10-12 15:29:25,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:29:25,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:29:25,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:29:25,967 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-12 15:29:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:26,037 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-12 15:29:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:29:26,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 15:29:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:26,039 INFO L225 Difference]: With dead ends: 47 [2020-10-12 15:29:26,039 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:29:26,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:29:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:29:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-12 15:29:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:29:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-12 15:29:26,046 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-12 15:29:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:26,046 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-12 15:29:26,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:29:26,047 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-12 15:29:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:29:26,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:26,048 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:26,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:29:26,049 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:26,049 INFO L82 PathProgramCache]: Analyzing trace with hash 518390493, now seen corresponding path program 15 times [2020-10-12 15:29:26,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:26,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150693534] [2020-10-12 15:29:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:26,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:26,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:26,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:29:26,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:26,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-12 15:29:26,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:29:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:29:26,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:26,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:26,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:26,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:26,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:26,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:26,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:26,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:26,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:26,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:26,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:26,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150693534] [2020-10-12 15:29:26,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:26,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:29:26,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57066954] [2020-10-12 15:29:26,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:29:26,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:29:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:29:26,546 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-12 15:29:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:26,624 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-12 15:29:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:29:26,624 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-12 15:29:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:26,625 INFO L225 Difference]: With dead ends: 49 [2020-10-12 15:29:26,626 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 15:29:26,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:29:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 15:29:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 15:29:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 15:29:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-12 15:29:26,632 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-12 15:29:26,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:26,633 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-12 15:29:26,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:29:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-12 15:29:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:29:26,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:26,634 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:26,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:29:26,635 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:26,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1092418203, now seen corresponding path program 16 times [2020-10-12 15:29:26,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:26,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451393477] [2020-10-12 15:29:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:26,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:26,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:26,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:29:26,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:26,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-12 15:29:26,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:29:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:29:26,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:27,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:27,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:27,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:27,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:27,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:27,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:27,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:27,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:27,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:27,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:27,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:27,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451393477] [2020-10-12 15:29:27,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:27,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:29:27,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491273569] [2020-10-12 15:29:27,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:29:27,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:29:27,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:29:27,216 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-12 15:29:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:27,291 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-12 15:29:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:29:27,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-12 15:29:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:27,293 INFO L225 Difference]: With dead ends: 51 [2020-10-12 15:29:27,293 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:29:27,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:29:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:29:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-12 15:29:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 15:29:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-12 15:29:27,300 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-12 15:29:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:27,300 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-12 15:29:27,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:29:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-12 15:29:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:29:27,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:27,301 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:27,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:29:27,302 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:27,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:27,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1317733671, now seen corresponding path program 17 times [2020-10-12 15:29:27,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:27,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100315491] [2020-10-12 15:29:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:27,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:27,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:27,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:29:27,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:27,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-12 15:29:27,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:27,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:29:27,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:27,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:29:27,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:27,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:27,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:27,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:27,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:27,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:27,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:27,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:27,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:27,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100315491] [2020-10-12 15:29:27,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:27,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:29:27,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769378995] [2020-10-12 15:29:27,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:29:27,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:27,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:29:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:29:27,828 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-12 15:29:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:27,912 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-12 15:29:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:29:27,913 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-12 15:29:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:27,914 INFO L225 Difference]: With dead ends: 53 [2020-10-12 15:29:27,914 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 15:29:27,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:29:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 15:29:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-12 15:29:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 15:29:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-12 15:29:27,920 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-12 15:29:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:27,921 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-12 15:29:27,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:29:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-12 15:29:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:29:27,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:27,922 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:27,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:29:27,922 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1808655255, now seen corresponding path program 18 times [2020-10-12 15:29:27,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:27,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517045152] [2020-10-12 15:29:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:27,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:28,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:28,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:29:28,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:28,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-12 15:29:28,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:29:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:29:28,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:28,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:28,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:28,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:28,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:28,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:28,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:28,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:28,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:28,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:28,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:28,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:28,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517045152] [2020-10-12 15:29:28,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:28,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:29:28,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832716200] [2020-10-12 15:29:28,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:29:28,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:28,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:29:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:29:28,527 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-12 15:29:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:28,617 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-12 15:29:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:29:28,618 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-12 15:29:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:28,618 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:29:28,619 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 15:29:28,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:29:28,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 15:29:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-12 15:29:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 15:29:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-12 15:29:28,625 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-12 15:29:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:28,625 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-12 15:29:28,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:29:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-12 15:29:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:29:28,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:28,626 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:28,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:29:28,627 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:28,627 INFO L82 PathProgramCache]: Analyzing trace with hash -208694059, now seen corresponding path program 19 times [2020-10-12 15:29:28,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:28,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692981202] [2020-10-12 15:29:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:28,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:28,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:28,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:29:28,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:28,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-12 15:29:28,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:28,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:29:28,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:28,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:29:28,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:29,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:29,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:29,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:29,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:29,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:29,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:29,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:29,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:29,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692981202] [2020-10-12 15:29:29,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:29,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:29:29,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094378314] [2020-10-12 15:29:29,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:29:29,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:29,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:29:29,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:29:29,236 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-12 15:29:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:29,316 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-12 15:29:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:29:29,317 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-12 15:29:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:29,318 INFO L225 Difference]: With dead ends: 57 [2020-10-12 15:29:29,318 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:29:29,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:29:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:29:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-12 15:29:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:29:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-12 15:29:29,324 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-12 15:29:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:29,324 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-12 15:29:29,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:29:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-12 15:29:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:29:29,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:29,325 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:29,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:29:29,326 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:29,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1851134317, now seen corresponding path program 20 times [2020-10-12 15:29:29,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:29,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214863887] [2020-10-12 15:29:29,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:29,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:29,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:29,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:29:29,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:29,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-12 15:29:29,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:29,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:29:29,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:29,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:29:29,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:30,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:30,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:30,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:30,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:30,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:30,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:30,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:30,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:30,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:30,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:30,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214863887] [2020-10-12 15:29:30,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:30,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:29:30,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676405936] [2020-10-12 15:29:30,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:29:30,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:29:30,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:29:30,078 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-12 15:29:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:30,188 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-12 15:29:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:29:30,195 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-12 15:29:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:30,196 INFO L225 Difference]: With dead ends: 59 [2020-10-12 15:29:30,197 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:29:30,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:29:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:29:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-12 15:29:30,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:29:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-12 15:29:30,205 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-12 15:29:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:30,205 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-12 15:29:30,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:29:30,206 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-12 15:29:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:29:30,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:30,209 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:30,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:29:30,209 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash 311742673, now seen corresponding path program 21 times [2020-10-12 15:29:30,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:30,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948106922] [2020-10-12 15:29:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:30,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:30,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:30,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:29:30,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:30,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-12 15:29:30,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:30,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:29:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:29:30,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:29:30,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:30,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:30,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:30,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:30,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:30,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:30,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:30,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:30,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948106922] [2020-10-12 15:29:30,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:30,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:29:30,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107020471] [2020-10-12 15:29:30,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:29:30,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:29:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:29:30,988 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-12 15:29:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:31,105 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-12 15:29:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:29:31,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-12 15:29:31,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:31,106 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:29:31,106 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 15:29:31,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:29:31,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 15:29:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-12 15:29:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 15:29:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-12 15:29:31,114 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-12 15:29:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:31,114 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-12 15:29:31,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:29:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-12 15:29:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 15:29:31,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:31,115 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:31,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:29:31,116 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:31,117 INFO L82 PathProgramCache]: Analyzing trace with hash 72358799, now seen corresponding path program 22 times [2020-10-12 15:29:31,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:31,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15370773] [2020-10-12 15:29:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:31,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:31,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:31,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 15:29:31,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:31,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-12 15:29:31,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:29:31,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:31,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:29:31,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:31,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:31,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:31,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:31,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:31,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:31,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:31,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:31,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:31,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:31,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:31,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:31,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15370773] [2020-10-12 15:29:31,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:31,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:29:31,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065947110] [2020-10-12 15:29:31,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:29:31,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:31,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:29:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:29:31,868 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-10-12 15:29:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:31,978 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-12 15:29:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:29:31,979 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-12 15:29:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:31,980 INFO L225 Difference]: With dead ends: 63 [2020-10-12 15:29:31,980 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:29:31,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:29:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:29:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-12 15:29:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 15:29:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-12 15:29:31,990 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-12 15:29:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:31,990 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-12 15:29:31,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:29:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-12 15:29:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:29:31,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:31,991 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:31,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:29:31,994 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:31,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1952689869, now seen corresponding path program 23 times [2020-10-12 15:29:31,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:31,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449429586] [2020-10-12 15:29:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:32,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:32,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:32,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 15:29:32,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:32,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-12 15:29:32,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:32,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:29:32,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:32,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 15:29:32,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:32,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:32,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:32,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:32,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:32,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:32,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:32,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:32,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:32,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:32,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:32,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:32,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449429586] [2020-10-12 15:29:32,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:32,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:29:32,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958699428] [2020-10-12 15:29:32,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:29:32,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:29:32,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:29:32,822 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-12 15:29:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:32,940 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-12 15:29:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:29:32,941 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-12 15:29:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:32,942 INFO L225 Difference]: With dead ends: 65 [2020-10-12 15:29:32,942 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 15:29:32,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:29:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 15:29:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-12 15:29:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 15:29:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-12 15:29:32,949 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-12 15:29:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:32,949 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-12 15:29:32,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:29:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-12 15:29:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:29:32,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:32,958 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:32,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:29:32,959 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash 769616523, now seen corresponding path program 24 times [2020-10-12 15:29:32,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:32,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211490582] [2020-10-12 15:29:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:32,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:33,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:33,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:29:33,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:33,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-12 15:29:33,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:29:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 15:29:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:33,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:33,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:33,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:33,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:33,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:33,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:29:33,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:33,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:33,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:33,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211490582] [2020-10-12 15:29:33,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:33,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:29:33,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468564269] [2020-10-12 15:29:33,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:29:33,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:29:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:29:33,979 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-10-12 15:29:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:34,088 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-12 15:29:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:29:34,089 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-12 15:29:34,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:34,091 INFO L225 Difference]: With dead ends: 67 [2020-10-12 15:29:34,091 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:29:34,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:29:34,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:29:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-12 15:29:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 15:29:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-12 15:29:34,097 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-12 15:29:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:34,097 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-12 15:29:34,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:29:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-12 15:29:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:29:34,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:34,098 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:34,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:29:34,099 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:34,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2002464457, now seen corresponding path program 25 times [2020-10-12 15:29:34,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:34,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352260371] [2020-10-12 15:29:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:34,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:34,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:34,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 15:29:34,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:34,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-12 15:29:34,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:34,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 15:29:34,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:34,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 15:29:34,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:34,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:34,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:34,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:34,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:34,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:34,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:34,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:34,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:34,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:34,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:34,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:34,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352260371] [2020-10-12 15:29:34,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:34,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:29:34,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102597210] [2020-10-12 15:29:34,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:29:34,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:34,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:29:34,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:29:34,959 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-12 15:29:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:35,063 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-12 15:29:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:29:35,064 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-12 15:29:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:35,065 INFO L225 Difference]: With dead ends: 69 [2020-10-12 15:29:35,065 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 15:29:35,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:29:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 15:29:35,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-12 15:29:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 15:29:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-12 15:29:35,070 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-12 15:29:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:35,071 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-12 15:29:35,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:29:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-12 15:29:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 15:29:35,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:35,072 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:35,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:29:35,073 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1358355335, now seen corresponding path program 26 times [2020-10-12 15:29:35,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:35,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279184189] [2020-10-12 15:29:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:35,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:35,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:35,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:29:35,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:35,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-12 15:29:35,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:35,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 15:29:35,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:35,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 15:29:35,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:36,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:36,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:36,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:36,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:36,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:36,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:29:36,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:36,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:36,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279184189] [2020-10-12 15:29:36,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:36,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 15:29:36,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395960822] [2020-10-12 15:29:36,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 15:29:36,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:36,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 15:29:36,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:29:36,060 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-12 15:29:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:36,203 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-12 15:29:36,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:29:36,204 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-12 15:29:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:36,205 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:29:36,205 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:29:36,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:29:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:29:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-12 15:29:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 15:29:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-12 15:29:36,210 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-12 15:29:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:36,211 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-12 15:29:36,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 15:29:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-12 15:29:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 15:29:36,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:36,212 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:36,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:29:36,212 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:36,213 INFO L82 PathProgramCache]: Analyzing trace with hash 844779717, now seen corresponding path program 27 times [2020-10-12 15:29:36,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:36,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682544802] [2020-10-12 15:29:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:36,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:36,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:36,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:29:36,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:36,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-12 15:29:36,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:29:36,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:36,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 15:29:36,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:37,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:37,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:37,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:37,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:37,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:37,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:37,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:37,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:37,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682544802] [2020-10-12 15:29:37,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:37,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 15:29:37,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742104182] [2020-10-12 15:29:37,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 15:29:37,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:37,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 15:29:37,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:29:37,240 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-12 15:29:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:37,371 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-12 15:29:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:29:37,373 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-12 15:29:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:37,374 INFO L225 Difference]: With dead ends: 73 [2020-10-12 15:29:37,374 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 15:29:37,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:29:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 15:29:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-12 15:29:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 15:29:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-12 15:29:37,379 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-12 15:29:37,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:37,379 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-12 15:29:37,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 15:29:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-12 15:29:37,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 15:29:37,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:37,380 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:37,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:29:37,380 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1219849859, now seen corresponding path program 28 times [2020-10-12 15:29:37,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:37,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122989667] [2020-10-12 15:29:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:37,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:37,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:37,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 15:29:37,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:37,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-12 15:29:37,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 15:29:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 15:29:37,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:38,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:38,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:38,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:38,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:38,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:38,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:38,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:38,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:38,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:38,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:38,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122989667] [2020-10-12 15:29:38,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:38,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:29:38,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762286657] [2020-10-12 15:29:38,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:29:38,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:38,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:29:38,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:29:38,375 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-12 15:29:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:38,495 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-12 15:29:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:29:38,496 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-12 15:29:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:38,497 INFO L225 Difference]: With dead ends: 75 [2020-10-12 15:29:38,497 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 15:29:38,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:29:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 15:29:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-12 15:29:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 15:29:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-12 15:29:38,503 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-12 15:29:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:38,503 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-12 15:29:38,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 15:29:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-12 15:29:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 15:29:38,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:38,505 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:38,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:29:38,505 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:38,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash 885003457, now seen corresponding path program 29 times [2020-10-12 15:29:38,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:38,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110126580] [2020-10-12 15:29:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:38,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:38,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:38,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:29:38,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:38,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-12 15:29:38,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:38,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 15:29:38,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:38,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 15:29:38,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:39,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:39,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:39,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:39,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:39,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:39,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:39,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:39,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:39,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:39,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:39,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:39,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110126580] [2020-10-12 15:29:39,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:39,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 15:29:39,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847581211] [2020-10-12 15:29:39,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 15:29:39,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:39,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 15:29:39,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:29:39,609 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-12 15:29:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:39,727 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-12 15:29:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 15:29:39,728 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-12 15:29:39,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:39,730 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:29:39,730 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 15:29:39,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:29:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 15:29:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-12 15:29:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 15:29:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-12 15:29:39,738 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-12 15:29:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:39,738 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-12 15:29:39,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 15:29:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-12 15:29:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:29:39,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:39,740 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:39,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:29:39,741 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1220158335, now seen corresponding path program 30 times [2020-10-12 15:29:39,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:39,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931320957] [2020-10-12 15:29:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:39,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:40,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:40,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 15:29:40,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-12 15:29:40,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 15:29:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 15:29:40,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:40,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:40,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:40,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:40,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:40,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:40,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:29:40,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:40,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:40,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:40,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:40,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:40,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931320957] [2020-10-12 15:29:40,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:40,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 15:29:40,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218874060] [2020-10-12 15:29:40,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 15:29:40,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 15:29:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:29:40,823 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-12 15:29:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:40,933 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-10-12 15:29:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 15:29:40,934 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-12 15:29:40,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:40,935 INFO L225 Difference]: With dead ends: 79 [2020-10-12 15:29:40,935 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 15:29:40,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:29:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 15:29:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-12 15:29:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:29:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-12 15:29:40,944 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-12 15:29:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:40,945 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-12 15:29:40,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 15:29:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-12 15:29:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 15:29:40,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:40,946 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:40,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:29:40,947 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:40,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1181448893, now seen corresponding path program 31 times [2020-10-12 15:29:40,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:40,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108608811] [2020-10-12 15:29:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:41,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:41,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 15:29:41,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:41,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-12 15:29:41,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 15:29:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 15:29:41,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:42,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:42,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:42,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:42,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:42,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:42,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:42,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:42,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:42,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108608811] [2020-10-12 15:29:42,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:42,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 15:29:42,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060998268] [2020-10-12 15:29:42,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 15:29:42,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 15:29:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:29:42,142 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-12 15:29:42,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:42,289 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-10-12 15:29:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:29:42,290 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-12 15:29:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:42,291 INFO L225 Difference]: With dead ends: 81 [2020-10-12 15:29:42,291 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:29:42,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:29:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:29:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-12 15:29:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 15:29:42,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-12 15:29:42,303 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-12 15:29:42,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:42,304 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-12 15:29:42,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 15:29:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-12 15:29:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 15:29:42,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:42,306 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:42,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:29:42,307 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1658586501, now seen corresponding path program 32 times [2020-10-12 15:29:42,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:42,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258133789] [2020-10-12 15:29:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:42,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:42,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:42,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 15:29:42,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:42,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-12 15:29:42,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:42,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 15:29:42,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:42,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 15:29:42,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:43,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:43,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:43,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:43,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:43,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:43,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:43,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:43,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:43,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:43,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:43,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:43,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258133789] [2020-10-12 15:29:43,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:43,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 15:29:43,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925943456] [2020-10-12 15:29:43,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 15:29:43,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 15:29:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:29:43,611 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-12 15:29:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:43,778 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-10-12 15:29:43,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 15:29:43,778 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-12 15:29:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:43,780 INFO L225 Difference]: With dead ends: 83 [2020-10-12 15:29:43,782 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 15:29:43,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:29:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 15:29:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-12 15:29:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 15:29:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-12 15:29:43,796 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-12 15:29:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:43,796 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-12 15:29:43,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 15:29:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-12 15:29:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 15:29:43,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:43,798 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:43,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:29:43,798 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:43,799 INFO L82 PathProgramCache]: Analyzing trace with hash 666600121, now seen corresponding path program 33 times [2020-10-12 15:29:43,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:43,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130656329] [2020-10-12 15:29:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:43,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:44,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:44,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 15:29:44,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:44,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-12 15:29:44,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 15:29:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 15:29:44,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:45,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:45,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:45,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:45,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:45,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:45,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:45,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:45,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:45,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:45,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130656329] [2020-10-12 15:29:45,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:45,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 15:29:45,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283400662] [2020-10-12 15:29:45,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 15:29:45,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:45,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 15:29:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:29:45,152 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-12 15:29:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:45,288 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-10-12 15:29:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 15:29:45,289 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-12 15:29:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:45,290 INFO L225 Difference]: With dead ends: 85 [2020-10-12 15:29:45,290 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:29:45,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:29:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:29:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-12 15:29:45,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 15:29:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-12 15:29:45,296 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-12 15:29:45,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:45,296 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-12 15:29:45,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 15:29:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-12 15:29:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 15:29:45,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:45,297 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:45,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:29:45,298 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1787949943, now seen corresponding path program 34 times [2020-10-12 15:29:45,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:45,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012461096] [2020-10-12 15:29:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:45,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:45,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:45,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 15:29:45,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:45,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-12 15:29:45,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 15:29:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 15:29:45,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:46,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:46,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:46,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:46,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:46,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:46,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:46,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:46,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:46,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012461096] [2020-10-12 15:29:46,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:46,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 15:29:46,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014928701] [2020-10-12 15:29:46,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 15:29:46,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 15:29:46,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:29:46,674 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-12 15:29:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:46,834 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-10-12 15:29:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 15:29:46,834 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-12 15:29:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:46,835 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:29:46,836 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 15:29:46,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:29:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 15:29:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-12 15:29:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 15:29:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-12 15:29:46,843 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-12 15:29:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:46,843 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-12 15:29:46,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 15:29:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-12 15:29:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 15:29:46,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:46,844 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:46,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:29:46,845 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1368337589, now seen corresponding path program 35 times [2020-10-12 15:29:46,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:46,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153425897] [2020-10-12 15:29:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:46,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:47,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:47,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 15:29:47,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:47,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-12 15:29:47,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 15:29:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 15:29:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:48,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:48,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:48,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:48,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:48,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:48,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:48,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:48,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:48,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:48,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:48,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153425897] [2020-10-12 15:29:48,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:48,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 15:29:48,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835301842] [2020-10-12 15:29:48,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 15:29:48,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:48,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 15:29:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:29:48,418 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-12 15:29:48,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:48,598 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-10-12 15:29:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 15:29:48,599 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-12 15:29:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:48,600 INFO L225 Difference]: With dead ends: 89 [2020-10-12 15:29:48,600 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 15:29:48,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:29:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 15:29:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-12 15:29:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 15:29:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-12 15:29:48,609 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-12 15:29:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:48,609 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-12 15:29:48,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 15:29:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-12 15:29:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 15:29:48,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:48,612 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:48,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:29:48,612 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1847791219, now seen corresponding path program 36 times [2020-10-12 15:29:48,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:48,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099234418] [2020-10-12 15:29:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:48,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:49,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:49,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 15:29:49,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:49,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-12 15:29:49,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:49,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 15:29:49,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:49,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 15:29:49,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:50,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:50,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:50,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:50,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:50,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:50,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:50,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:50,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:29:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:50,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099234418] [2020-10-12 15:29:50,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:50,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 15:29:50,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133778552] [2020-10-12 15:29:50,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 15:29:50,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:50,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 15:29:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:29:50,435 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-12 15:29:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:50,651 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-10-12 15:29:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 15:29:50,653 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-12 15:29:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:50,654 INFO L225 Difference]: With dead ends: 91 [2020-10-12 15:29:50,654 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:29:50,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:29:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:29:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-12 15:29:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 15:29:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-12 15:29:50,661 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-12 15:29:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:50,662 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-12 15:29:50,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 15:29:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-12 15:29:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 15:29:50,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:50,664 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:50,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:29:50,665 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:50,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1253738319, now seen corresponding path program 37 times [2020-10-12 15:29:50,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:50,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661745299] [2020-10-12 15:29:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:50,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:51,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:51,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 15:29:51,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:51,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-12 15:29:51,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:51,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 15:29:51,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:51,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 15:29:51,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:52,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:52,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:52,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:52,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:52,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:52,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:52,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-12 15:29:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:52,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661745299] [2020-10-12 15:29:52,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:52,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 15:29:52,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582488754] [2020-10-12 15:29:52,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 15:29:52,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:52,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 15:29:52,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:29:52,357 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-12 15:29:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:52,552 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-10-12 15:29:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 15:29:52,553 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-12 15:29:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:52,554 INFO L225 Difference]: With dead ends: 93 [2020-10-12 15:29:52,554 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 15:29:52,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:29:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 15:29:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-12 15:29:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 15:29:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-12 15:29:52,563 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-12 15:29:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:52,563 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-12 15:29:52,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 15:29:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-12 15:29:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 15:29:52,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:52,564 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:52,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:29:52,565 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1116320913, now seen corresponding path program 38 times [2020-10-12 15:29:52,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:52,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238833951] [2020-10-12 15:29:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:52,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:53,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:53,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 15:29:53,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:53,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-12 15:29:53,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 15:29:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 15:29:53,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:54,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:54,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:54,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:54,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:54,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:29:54,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:54,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:54,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:54,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:54,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:54,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238833951] [2020-10-12 15:29:54,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:54,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 15:29:54,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261387773] [2020-10-12 15:29:54,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 15:29:54,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 15:29:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:29:54,240 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-12 15:29:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:54,429 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-10-12 15:29:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 15:29:54,430 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-12 15:29:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:54,431 INFO L225 Difference]: With dead ends: 95 [2020-10-12 15:29:54,431 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 15:29:54,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:29:54,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 15:29:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-12 15:29:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 15:29:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-12 15:29:54,436 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-12 15:29:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:54,436 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-12 15:29:54,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 15:29:54,437 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-12 15:29:54,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 15:29:54,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:54,438 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:54,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:29:54,439 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2092787373, now seen corresponding path program 39 times [2020-10-12 15:29:54,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:54,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558699146] [2020-10-12 15:29:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:54,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:55,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:55,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 15:29:55,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:55,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-12 15:29:55,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:55,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 15:29:55,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:55,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 15:29:55,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:55,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:55,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:56,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:56,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:56,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:56,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:56,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:56,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:56,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558699146] [2020-10-12 15:29:56,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:56,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 15:29:56,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754933820] [2020-10-12 15:29:56,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 15:29:56,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:56,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 15:29:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 15:29:56,020 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-12 15:29:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:56,204 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2020-10-12 15:29:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 15:29:56,207 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-12 15:29:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:56,208 INFO L225 Difference]: With dead ends: 97 [2020-10-12 15:29:56,208 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 15:29:56,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 15:29:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 15:29:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-12 15:29:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 15:29:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-12 15:29:56,215 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-12 15:29:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:56,215 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-12 15:29:56,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 15:29:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-12 15:29:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 15:29:56,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:56,217 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:56,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:29:56,217 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:56,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2035635605, now seen corresponding path program 40 times [2020-10-12 15:29:56,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:56,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430468523] [2020-10-12 15:29:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:56,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:56,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:56,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 15:29:56,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:56,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-12 15:29:56,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:56,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 15:29:56,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:56,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 15:29:56,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:57,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:57,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:57,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:57,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:57,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:57,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:57,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:57,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:57,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:57,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:57,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:57,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430468523] [2020-10-12 15:29:57,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:57,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 15:29:57,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504774693] [2020-10-12 15:29:57,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 15:29:57,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:57,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 15:29:57,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 15:29:57,777 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-12 15:29:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:57,988 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-10-12 15:29:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 15:29:57,989 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-12 15:29:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:57,990 INFO L225 Difference]: With dead ends: 99 [2020-10-12 15:29:57,990 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 15:29:57,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 15:29:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 15:29:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-12 15:29:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 15:29:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-12 15:29:57,998 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-12 15:29:57,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:57,999 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-12 15:29:57,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 15:29:57,999 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-12 15:29:58,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 15:29:58,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:58,000 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:58,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:29:58,001 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash -900335959, now seen corresponding path program 41 times [2020-10-12 15:29:58,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:58,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049294832] [2020-10-12 15:29:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:58,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:58,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:58,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 15:29:58,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:58,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-12 15:29:58,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:58,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 15:29:58,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:29:58,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 15:29:58,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:59,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:29:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:59,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:29:59,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:29:59,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:29:59,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:29:59,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:29:59,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:29:59,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:29:59,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:29:59,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:29:59,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:29:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:29:59,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049294832] [2020-10-12 15:29:59,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:29:59,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 15:29:59,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652493418] [2020-10-12 15:29:59,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 15:29:59,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:29:59,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 15:29:59,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 15:29:59,690 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-12 15:29:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:29:59,888 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-10-12 15:29:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 15:29:59,889 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-12 15:29:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:29:59,891 INFO L225 Difference]: With dead ends: 101 [2020-10-12 15:29:59,891 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 15:29:59,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 15:29:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 15:29:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-12 15:29:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 15:29:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-12 15:29:59,897 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-12 15:29:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:29:59,898 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-12 15:29:59,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 15:29:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-12 15:29:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 15:29:59,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:29:59,899 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:29:59,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 15:29:59,900 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:29:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:29:59,900 INFO L82 PathProgramCache]: Analyzing trace with hash -799069337, now seen corresponding path program 42 times [2020-10-12 15:29:59,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:29:59,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645717695] [2020-10-12 15:29:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:29:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:29:59,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:00,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:00,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 15:30:00,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:00,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-12 15:30:00,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:00,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 15:30:00,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:00,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 15:30:00,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:01,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:01,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:01,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:01,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:01,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:01,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:30:01,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:01,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:01,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:01,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:01,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:01,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645717695] [2020-10-12 15:30:01,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:01,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 15:30:01,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852192989] [2020-10-12 15:30:01,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 15:30:01,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:01,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 15:30:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:30:01,629 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-12 15:30:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:01,820 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-10-12 15:30:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 15:30:01,821 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-12 15:30:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:01,822 INFO L225 Difference]: With dead ends: 103 [2020-10-12 15:30:01,822 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 15:30:01,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:30:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 15:30:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-12 15:30:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 15:30:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-12 15:30:01,832 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-12 15:30:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:01,832 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-12 15:30:01,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 15:30:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-12 15:30:01,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 15:30:01,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:01,834 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:01,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 15:30:01,835 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:01,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2028873893, now seen corresponding path program 43 times [2020-10-12 15:30:01,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:01,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560024931] [2020-10-12 15:30:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:01,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:02,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:02,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 15:30:02,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:02,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-12 15:30:02,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 15:30:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 15:30:02,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:03,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:03,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:03,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:03,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:03,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:30:03,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:03,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:03,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560024931] [2020-10-12 15:30:03,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:03,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 15:30:03,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476124461] [2020-10-12 15:30:03,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 15:30:03,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:03,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 15:30:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:30:03,494 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-12 15:30:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:03,695 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-10-12 15:30:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 15:30:03,695 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-12 15:30:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:03,697 INFO L225 Difference]: With dead ends: 105 [2020-10-12 15:30:03,697 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 15:30:03,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:30:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 15:30:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-12 15:30:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 15:30:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-12 15:30:03,702 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-12 15:30:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:03,703 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-12 15:30:03,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 15:30:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-12 15:30:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 15:30:03,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:03,704 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:03,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 15:30:03,705 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash 968019555, now seen corresponding path program 44 times [2020-10-12 15:30:03,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:03,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304207837] [2020-10-12 15:30:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:03,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:04,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:04,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 15:30:04,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:04,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-12 15:30:04,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 15:30:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 15:30:04,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:05,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:05,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:05,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:05,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:05,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:05,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:30:05,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:05,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:05,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:05,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:05,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:05,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304207837] [2020-10-12 15:30:05,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:05,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 15:30:05,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690227075] [2020-10-12 15:30:05,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 15:30:05,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 15:30:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 15:30:05,466 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-12 15:30:05,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:05,671 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-10-12 15:30:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 15:30:05,671 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-12 15:30:05,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:05,673 INFO L225 Difference]: With dead ends: 107 [2020-10-12 15:30:05,673 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 15:30:05,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 15:30:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 15:30:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-12 15:30:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 15:30:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-12 15:30:05,679 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-12 15:30:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:05,680 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-12 15:30:05,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 15:30:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-12 15:30:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 15:30:05,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:05,681 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:05,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 15:30:05,681 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:05,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:05,682 INFO L82 PathProgramCache]: Analyzing trace with hash -605750111, now seen corresponding path program 45 times [2020-10-12 15:30:05,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:05,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328145224] [2020-10-12 15:30:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:05,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:06,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:06,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 15:30:06,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:06,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-12 15:30:06,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:06,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 15:30:06,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:06,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 15:30:06,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:07,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:07,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:07,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:07,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:07,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:07,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:30:07,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:07,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:07,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:07,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:07,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:07,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328145224] [2020-10-12 15:30:07,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:07,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 15:30:07,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243938164] [2020-10-12 15:30:07,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 15:30:07,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 15:30:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 15:30:07,529 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-12 15:30:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:07,703 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2020-10-12 15:30:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 15:30:07,704 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-12 15:30:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:07,706 INFO L225 Difference]: With dead ends: 109 [2020-10-12 15:30:07,706 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 15:30:07,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 15:30:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 15:30:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-12 15:30:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 15:30:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-12 15:30:07,711 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-12 15:30:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:07,712 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-12 15:30:07,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 15:30:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-12 15:30:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 15:30:07,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:07,713 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:07,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 15:30:07,713 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1169910945, now seen corresponding path program 46 times [2020-10-12 15:30:07,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:07,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992388788] [2020-10-12 15:30:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:08,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:08,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 15:30:08,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:08,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-12 15:30:08,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 15:30:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 15:30:08,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:09,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:09,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:09,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:09,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:09,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:09,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:09,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:09,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:09,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:09,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:09,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:09,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992388788] [2020-10-12 15:30:09,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:09,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 15:30:09,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242501069] [2020-10-12 15:30:09,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 15:30:09,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:09,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 15:30:09,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 15:30:09,626 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-12 15:30:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:09,857 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-10-12 15:30:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 15:30:09,858 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-12 15:30:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:09,859 INFO L225 Difference]: With dead ends: 111 [2020-10-12 15:30:09,859 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 15:30:09,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 15:30:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 15:30:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-12 15:30:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 15:30:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-12 15:30:09,865 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-12 15:30:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:09,866 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-12 15:30:09,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 15:30:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-12 15:30:09,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 15:30:09,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:09,867 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:09,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 15:30:09,867 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2132374173, now seen corresponding path program 47 times [2020-10-12 15:30:09,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:09,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54927816] [2020-10-12 15:30:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:09,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:10,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:10,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 15:30:10,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:10,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-12 15:30:10,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 15:30:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:10,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 15:30:10,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:11,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:11,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:11,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:11,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:11,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:30:11,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:11,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:11,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54927816] [2020-10-12 15:30:11,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:11,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 15:30:11,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115462853] [2020-10-12 15:30:11,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 15:30:11,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:11,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 15:30:11,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:30:11,875 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-12 15:30:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:12,087 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-10-12 15:30:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 15:30:12,087 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-12 15:30:12,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:12,088 INFO L225 Difference]: With dead ends: 113 [2020-10-12 15:30:12,088 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 15:30:12,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:30:12,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 15:30:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-12 15:30:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 15:30:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-12 15:30:12,094 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-12 15:30:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:12,094 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-12 15:30:12,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 15:30:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-12 15:30:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 15:30:12,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:12,096 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:12,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 15:30:12,096 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:12,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:12,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1647540827, now seen corresponding path program 48 times [2020-10-12 15:30:12,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:12,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346987495] [2020-10-12 15:30:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:12,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:12,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:12,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 15:30:12,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:12,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-12 15:30:12,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:12,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 15:30:12,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:12,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-12 15:30:12,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:14,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:14,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:14,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:14,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:14,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:14,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:14,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:14,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:14,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:14,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:14,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:14,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346987495] [2020-10-12 15:30:14,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:14,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 15:30:14,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690761867] [2020-10-12 15:30:14,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 15:30:14,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:14,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 15:30:14,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 15:30:14,160 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-10-12 15:30:14,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:14,389 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-10-12 15:30:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 15:30:14,390 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-12 15:30:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:14,391 INFO L225 Difference]: With dead ends: 115 [2020-10-12 15:30:14,391 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 15:30:14,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 15:30:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 15:30:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-12 15:30:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 15:30:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-12 15:30:14,398 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-12 15:30:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:14,398 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-12 15:30:14,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 15:30:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-12 15:30:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 15:30:14,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:14,399 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:14,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 15:30:14,400 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash -420836711, now seen corresponding path program 49 times [2020-10-12 15:30:14,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:14,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682028129] [2020-10-12 15:30:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:14,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:15,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:15,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 15:30:15,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:15,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-12 15:30:15,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 15:30:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 15:30:15,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:16,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:16,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:16,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:16,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:16,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:16,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:16,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682028129] [2020-10-12 15:30:16,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:16,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 15:30:16,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851380558] [2020-10-12 15:30:16,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 15:30:16,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 15:30:16,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 15:30:16,610 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-12 15:30:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:16,843 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2020-10-12 15:30:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 15:30:16,846 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-12 15:30:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:16,848 INFO L225 Difference]: With dead ends: 117 [2020-10-12 15:30:16,848 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 15:30:16,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 15:30:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 15:30:16,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-12 15:30:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 15:30:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-12 15:30:16,855 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-12 15:30:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:16,855 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-12 15:30:16,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 15:30:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-12 15:30:16,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 15:30:16,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:16,857 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:16,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 15:30:16,858 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash 438207319, now seen corresponding path program 50 times [2020-10-12 15:30:16,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:16,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206437954] [2020-10-12 15:30:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:16,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:17,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:17,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 15:30:17,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:17,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-12 15:30:17,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:17,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 15:30:17,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:17,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 15:30:17,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:19,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:19,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:19,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:19,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:19,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:19,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:19,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:19,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:19,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:19,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:19,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:19,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206437954] [2020-10-12 15:30:19,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:19,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 15:30:19,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076305524] [2020-10-12 15:30:19,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 15:30:19,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:19,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 15:30:19,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 15:30:19,107 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-10-12 15:30:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:19,351 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2020-10-12 15:30:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 15:30:19,353 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-12 15:30:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:19,354 INFO L225 Difference]: With dead ends: 119 [2020-10-12 15:30:19,354 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 15:30:19,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 15:30:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 15:30:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-12 15:30:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 15:30:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-12 15:30:19,360 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-10-12 15:30:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:19,360 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-12 15:30:19,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 15:30:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-12 15:30:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 15:30:19,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:19,361 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:19,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 15:30:19,362 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1345799317, now seen corresponding path program 51 times [2020-10-12 15:30:19,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:19,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322685247] [2020-10-12 15:30:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:19,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:20,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:20,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 15:30:20,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:20,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-12 15:30:20,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:20,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 15:30:20,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:20,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-12 15:30:20,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:21,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:21,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:21,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:21,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:21,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:21,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:21,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:21,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322685247] [2020-10-12 15:30:21,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:21,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 15:30:21,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712098655] [2020-10-12 15:30:21,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 15:30:21,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:21,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 15:30:21,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 15:30:21,697 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-10-12 15:30:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:21,926 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-10-12 15:30:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 15:30:21,926 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-10-12 15:30:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:21,928 INFO L225 Difference]: With dead ends: 121 [2020-10-12 15:30:21,928 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 15:30:21,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 15:30:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 15:30:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-12 15:30:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 15:30:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-10-12 15:30:21,933 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-10-12 15:30:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:21,934 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-10-12 15:30:21,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 15:30:21,934 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-10-12 15:30:21,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 15:30:21,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:21,935 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:21,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 15:30:21,936 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:21,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1663348307, now seen corresponding path program 52 times [2020-10-12 15:30:21,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:21,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102993189] [2020-10-12 15:30:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:21,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:22,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:22,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 15:30:22,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:22,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-12 15:30:22,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 15:30:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-12 15:30:22,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:24,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:24,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:24,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:24,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:24,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:24,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:30:24,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:24,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:24,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:24,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:24,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:24,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102993189] [2020-10-12 15:30:24,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:24,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 15:30:24,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844075862] [2020-10-12 15:30:24,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 15:30:24,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:24,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 15:30:24,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 15:30:24,587 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-10-12 15:30:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:24,838 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-10-12 15:30:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 15:30:24,839 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-10-12 15:30:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:24,840 INFO L225 Difference]: With dead ends: 123 [2020-10-12 15:30:24,840 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 15:30:24,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 15:30:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 15:30:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-12 15:30:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 15:30:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-12 15:30:24,846 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-10-12 15:30:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:24,847 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-12 15:30:24,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 15:30:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-12 15:30:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 15:30:24,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:24,848 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:24,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 15:30:24,848 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1885249681, now seen corresponding path program 53 times [2020-10-12 15:30:24,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:24,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556580404] [2020-10-12 15:30:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:24,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:25,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:25,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 15:30:25,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:25,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-12 15:30:25,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:25,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 15:30:25,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:25,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 15:30:25,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:27,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:27,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:27,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:27,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:27,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:27,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:27,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:27,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:27,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:27,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:27,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:27,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556580404] [2020-10-12 15:30:27,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:27,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 15:30:27,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863888605] [2020-10-12 15:30:27,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 15:30:27,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:27,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 15:30:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 15:30:27,441 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-10-12 15:30:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:27,670 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2020-10-12 15:30:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 15:30:27,671 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-10-12 15:30:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:27,672 INFO L225 Difference]: With dead ends: 125 [2020-10-12 15:30:27,672 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 15:30:27,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 15:30:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 15:30:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-12 15:30:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 15:30:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-10-12 15:30:27,678 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-10-12 15:30:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:27,679 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-10-12 15:30:27,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 15:30:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-10-12 15:30:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 15:30:27,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:27,680 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:27,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 15:30:27,680 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash 384105295, now seen corresponding path program 54 times [2020-10-12 15:30:27,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:27,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021409469] [2020-10-12 15:30:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:27,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:28,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:28,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 15:30:28,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:28,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 813 [2020-10-12 15:30:28,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:28,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 15:30:28,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:28,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 15:30:28,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:30,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:30,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:30,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:30,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:30,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:30,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:30,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:30,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:30,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:30,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021409469] [2020-10-12 15:30:30,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:30,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 15:30:30,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113024066] [2020-10-12 15:30:30,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 15:30:30,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 15:30:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 15:30:30,316 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-10-12 15:30:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:30,569 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2020-10-12 15:30:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 15:30:30,570 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-10-12 15:30:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:30,571 INFO L225 Difference]: With dead ends: 127 [2020-10-12 15:30:30,571 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 15:30:30,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 15:30:30,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 15:30:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-12 15:30:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 15:30:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-12 15:30:30,575 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-10-12 15:30:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:30,575 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-12 15:30:30,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 15:30:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-12 15:30:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 15:30:30,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:30,576 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:30,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 15:30:30,576 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:30,576 INFO L82 PathProgramCache]: Analyzing trace with hash 893361805, now seen corresponding path program 55 times [2020-10-12 15:30:30,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:30,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143469720] [2020-10-12 15:30:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:30,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:31,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:31,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 15:30:31,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:31,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-12 15:30:31,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 15:30:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-12 15:30:31,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:33,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:33,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:33,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:33,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:33,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:33,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:30:33,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:33,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:33,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:33,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:33,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:33,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143469720] [2020-10-12 15:30:33,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:33,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 15:30:33,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219947078] [2020-10-12 15:30:33,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 15:30:33,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 15:30:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 15:30:33,298 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-10-12 15:30:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:33,567 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2020-10-12 15:30:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 15:30:33,567 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-10-12 15:30:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:33,568 INFO L225 Difference]: With dead ends: 129 [2020-10-12 15:30:33,568 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 15:30:33,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 15:30:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 15:30:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-12 15:30:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 15:30:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-12 15:30:33,574 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-10-12 15:30:33,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:33,574 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-12 15:30:33,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 15:30:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-12 15:30:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-12 15:30:33,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:33,575 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:33,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 15:30:33,576 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:33,576 INFO L82 PathProgramCache]: Analyzing trace with hash 662596171, now seen corresponding path program 56 times [2020-10-12 15:30:33,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:33,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975310288] [2020-10-12 15:30:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:33,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:34,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:34,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 15:30:34,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:34,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-12 15:30:34,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 15:30:34,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:34,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-12 15:30:34,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:36,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:36,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:36,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:36,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:36,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:36,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:36,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:36,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:36,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:36,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:36,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975310288] [2020-10-12 15:30:36,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:36,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 15:30:36,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755013928] [2020-10-12 15:30:36,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 15:30:36,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:36,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 15:30:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 15:30:36,420 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-10-12 15:30:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:36,685 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-10-12 15:30:36,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 15:30:36,686 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-10-12 15:30:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:36,686 INFO L225 Difference]: With dead ends: 131 [2020-10-12 15:30:36,686 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 15:30:36,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 15:30:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 15:30:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-12 15:30:36,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 15:30:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-10-12 15:30:36,692 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-10-12 15:30:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:36,692 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-10-12 15:30:36,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 15:30:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-10-12 15:30:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 15:30:36,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:36,694 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:36,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 15:30:36,694 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:36,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2059846007, now seen corresponding path program 57 times [2020-10-12 15:30:36,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:36,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728077314] [2020-10-12 15:30:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:37,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:37,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 15:30:37,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:37,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 860 [2020-10-12 15:30:37,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 15:30:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 15:30:37,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:39,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:39,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:39,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:39,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:39,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:39,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:39,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:39,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:39,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:39,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:39,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728077314] [2020-10-12 15:30:39,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:39,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 15:30:39,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673522713] [2020-10-12 15:30:39,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 15:30:39,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:39,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 15:30:39,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 15:30:39,541 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-10-12 15:30:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:39,786 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2020-10-12 15:30:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 15:30:39,786 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-10-12 15:30:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:39,787 INFO L225 Difference]: With dead ends: 133 [2020-10-12 15:30:39,787 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 15:30:39,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 15:30:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 15:30:39,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-12 15:30:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 15:30:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-10-12 15:30:39,792 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-10-12 15:30:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:39,792 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-10-12 15:30:39,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 15:30:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-10-12 15:30:39,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 15:30:39,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:39,793 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:39,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 15:30:39,794 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:39,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:39,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1603271495, now seen corresponding path program 58 times [2020-10-12 15:30:39,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:39,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347257717] [2020-10-12 15:30:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:39,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:40,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:40,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 15:30:40,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:40,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-12 15:30:40,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:40,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 15:30:40,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:40,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-12 15:30:40,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:42,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:42,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:42,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:42,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:42,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:42,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:30:42,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:42,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:42,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:42,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:42,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347257717] [2020-10-12 15:30:42,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:42,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 15:30:42,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306349875] [2020-10-12 15:30:42,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 15:30:42,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:42,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 15:30:42,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 15:30:42,699 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-10-12 15:30:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:42,955 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-10-12 15:30:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 15:30:42,956 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-10-12 15:30:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:42,957 INFO L225 Difference]: With dead ends: 135 [2020-10-12 15:30:42,957 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 15:30:42,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 15:30:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 15:30:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-12 15:30:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 15:30:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-10-12 15:30:42,962 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-10-12 15:30:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:42,962 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-10-12 15:30:42,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 15:30:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-10-12 15:30:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 15:30:42,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:42,964 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:42,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 15:30:42,964 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash -13991803, now seen corresponding path program 59 times [2020-10-12 15:30:42,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:42,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35339952] [2020-10-12 15:30:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:42,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:43,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:43,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 15:30:43,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:43,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-12 15:30:43,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:43,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 15:30:43,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:43,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-12 15:30:43,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:45,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:45,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:45,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:45,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:45,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:45,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:45,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:45,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:45,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:45,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:45,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:45,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35339952] [2020-10-12 15:30:45,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:45,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 15:30:45,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937778849] [2020-10-12 15:30:45,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 15:30:45,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 15:30:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 15:30:45,844 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 62 states. [2020-10-12 15:30:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:46,059 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2020-10-12 15:30:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 15:30:46,059 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 128 [2020-10-12 15:30:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:46,061 INFO L225 Difference]: With dead ends: 137 [2020-10-12 15:30:46,061 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 15:30:46,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 15:30:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 15:30:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-12 15:30:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 15:30:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-10-12 15:30:46,067 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-10-12 15:30:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:46,067 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-10-12 15:30:46,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 15:30:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-10-12 15:30:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 15:30:46,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:46,068 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:46,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 15:30:46,069 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash 574139971, now seen corresponding path program 60 times [2020-10-12 15:30:46,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:46,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510942447] [2020-10-12 15:30:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:46,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:46,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 15:30:46,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:46,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-12 15:30:46,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:46,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 15:30:46,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:46,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-12 15:30:46,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:49,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:49,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:49,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:49,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:49,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:49,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:30:49,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:49,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:49,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:49,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:49,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:49,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510942447] [2020-10-12 15:30:49,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:49,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 15:30:49,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85275544] [2020-10-12 15:30:49,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 15:30:49,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:49,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 15:30:49,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 15:30:49,038 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 63 states. [2020-10-12 15:30:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:49,274 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2020-10-12 15:30:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 15:30:49,274 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 130 [2020-10-12 15:30:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:49,275 INFO L225 Difference]: With dead ends: 139 [2020-10-12 15:30:49,275 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 15:30:49,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 15:30:49,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 15:30:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-12 15:30:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 15:30:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-12 15:30:49,279 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-10-12 15:30:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:49,279 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-12 15:30:49,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 15:30:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-12 15:30:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 15:30:49,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:49,281 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:49,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 15:30:49,281 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1166908287, now seen corresponding path program 61 times [2020-10-12 15:30:49,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:49,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541969835] [2020-10-12 15:30:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:49,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:50,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:50,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 15:30:50,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:50,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 858 [2020-10-12 15:30:50,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:50,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 15:30:50,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:50,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 15:30:50,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:52,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:52,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:52,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:52,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:52,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:52,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:52,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:52,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:52,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:52,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:52,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:52,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541969835] [2020-10-12 15:30:52,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:52,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 15:30:52,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677477052] [2020-10-12 15:30:52,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 15:30:52,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:52,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 15:30:52,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 15:30:52,351 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 64 states. [2020-10-12 15:30:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:52,587 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-10-12 15:30:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 15:30:52,588 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 132 [2020-10-12 15:30:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:52,588 INFO L225 Difference]: With dead ends: 141 [2020-10-12 15:30:52,589 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 15:30:52,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 15:30:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 15:30:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-12 15:30:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-12 15:30:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-10-12 15:30:52,593 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-10-12 15:30:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:52,593 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-10-12 15:30:52,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 15:30:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-10-12 15:30:52,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 15:30:52,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:52,594 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:52,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 15:30:52,595 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:52,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:52,595 INFO L82 PathProgramCache]: Analyzing trace with hash 722961215, now seen corresponding path program 62 times [2020-10-12 15:30:52,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:52,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027110596] [2020-10-12 15:30:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:52,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:53,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:53,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 15:30:53,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:53,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-12 15:30:53,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:53,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 15:30:53,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:53,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-12 15:30:53,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:55,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:55,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:55,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:55,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:55,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:55,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:55,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:55,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:55,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:55,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:55,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027110596] [2020-10-12 15:30:55,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:55,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 15:30:55,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184544665] [2020-10-12 15:30:55,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 15:30:55,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 15:30:55,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 15:30:55,806 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 65 states. [2020-10-12 15:30:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:56,031 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2020-10-12 15:30:56,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 15:30:56,032 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 134 [2020-10-12 15:30:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:56,033 INFO L225 Difference]: With dead ends: 143 [2020-10-12 15:30:56,034 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 15:30:56,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 15:30:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 15:30:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-12 15:30:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 15:30:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-10-12 15:30:56,037 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-10-12 15:30:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:56,038 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-10-12 15:30:56,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 15:30:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-10-12 15:30:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 15:30:56,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:56,039 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:56,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 15:30:56,039 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash 116386429, now seen corresponding path program 63 times [2020-10-12 15:30:56,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:56,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285958400] [2020-10-12 15:30:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:56,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:56,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:56,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 15:30:56,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:56,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 889 [2020-10-12 15:30:56,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 15:30:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:30:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-12 15:30:56,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:59,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:30:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:59,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:30:59,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:30:59,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:30:59,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:30:59,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:30:59,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:30:59,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:30:59,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:30:59,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:30:59,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:30:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:30:59,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285958400] [2020-10-12 15:30:59,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:30:59,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 15:30:59,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167931132] [2020-10-12 15:30:59,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 15:30:59,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:30:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 15:30:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 15:30:59,305 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 66 states. [2020-10-12 15:30:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:30:59,547 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2020-10-12 15:30:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-12 15:30:59,548 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 136 [2020-10-12 15:30:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:30:59,549 INFO L225 Difference]: With dead ends: 145 [2020-10-12 15:30:59,549 INFO L226 Difference]: Without dead ends: 140 [2020-10-12 15:30:59,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 15:30:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-12 15:30:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-12 15:30:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 15:30:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-10-12 15:30:59,552 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-10-12 15:30:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:30:59,553 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-10-12 15:30:59,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 15:30:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-10-12 15:30:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 15:30:59,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:30:59,554 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:30:59,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 15:30:59,554 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:30:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:30:59,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1313569339, now seen corresponding path program 64 times [2020-10-12 15:30:59,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:30:59,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296349291] [2020-10-12 15:30:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:30:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:30:59,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:00,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:00,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 15:31:00,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:00,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-12 15:31:00,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-12 15:31:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 15:31:00,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:02,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:02,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:02,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:02,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:02,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:02,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:02,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:02,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:02,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:02,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296349291] [2020-10-12 15:31:02,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:02,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 15:31:02,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152437376] [2020-10-12 15:31:02,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 15:31:02,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:02,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 15:31:02,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 15:31:02,939 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 67 states. [2020-10-12 15:31:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:03,230 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2020-10-12 15:31:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-12 15:31:03,230 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 138 [2020-10-12 15:31:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:03,231 INFO L225 Difference]: With dead ends: 147 [2020-10-12 15:31:03,232 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 15:31:03,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 15:31:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 15:31:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-12 15:31:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 15:31:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-10-12 15:31:03,236 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-10-12 15:31:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:03,236 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-10-12 15:31:03,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-12 15:31:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-10-12 15:31:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-12 15:31:03,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:03,238 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:03,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 15:31:03,238 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:03,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash 755110521, now seen corresponding path program 65 times [2020-10-12 15:31:03,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:03,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744436205] [2020-10-12 15:31:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:03,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:04,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:04,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 15:31:04,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:04,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 989 [2020-10-12 15:31:04,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-12 15:31:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-12 15:31:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:06,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:06,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:06,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:06,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:06,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:06,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:06,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:06,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:06,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:06,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744436205] [2020-10-12 15:31:06,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:06,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-12 15:31:06,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494317156] [2020-10-12 15:31:06,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-12 15:31:06,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:06,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-12 15:31:06,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 15:31:06,787 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 68 states. [2020-10-12 15:31:07,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:07,072 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2020-10-12 15:31:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-12 15:31:07,073 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 140 [2020-10-12 15:31:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:07,073 INFO L225 Difference]: With dead ends: 149 [2020-10-12 15:31:07,074 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 15:31:07,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 15:31:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 15:31:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-12 15:31:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 15:31:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-10-12 15:31:07,077 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-10-12 15:31:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:07,077 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-10-12 15:31:07,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-12 15:31:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-10-12 15:31:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 15:31:07,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:07,078 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:07,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 15:31:07,078 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash 947098423, now seen corresponding path program 66 times [2020-10-12 15:31:07,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:07,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251056301] [2020-10-12 15:31:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:07,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:08,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:08,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 15:31:08,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:08,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-12 15:31:08,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 15:31:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-12 15:31:08,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:10,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:10,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:10,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:10,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:10,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:10,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:10,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:10,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:10,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:10,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:10,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251056301] [2020-10-12 15:31:10,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:10,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-12 15:31:10,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894454187] [2020-10-12 15:31:10,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-12 15:31:10,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-12 15:31:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 15:31:10,744 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 69 states. [2020-10-12 15:31:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:11,031 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-10-12 15:31:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-12 15:31:11,036 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 142 [2020-10-12 15:31:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:11,037 INFO L225 Difference]: With dead ends: 151 [2020-10-12 15:31:11,038 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 15:31:11,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 15:31:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 15:31:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-12 15:31:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 15:31:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-10-12 15:31:11,042 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-10-12 15:31:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:11,042 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-10-12 15:31:11,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-12 15:31:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-10-12 15:31:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 15:31:11,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:11,043 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:11,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 15:31:11,043 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash 763878517, now seen corresponding path program 67 times [2020-10-12 15:31:11,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:11,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963072802] [2020-10-12 15:31:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:11,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:12,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:12,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-12 15:31:12,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:12,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1049 [2020-10-12 15:31:12,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-12 15:31:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-12 15:31:12,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:14,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:14,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:14,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:14,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:14,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:14,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:14,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:14,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:14,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963072802] [2020-10-12 15:31:14,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:14,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 15:31:14,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845637041] [2020-10-12 15:31:14,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 15:31:14,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:14,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 15:31:14,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 15:31:14,793 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 70 states. [2020-10-12 15:31:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:15,099 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2020-10-12 15:31:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 15:31:15,100 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 144 [2020-10-12 15:31:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:15,101 INFO L225 Difference]: With dead ends: 153 [2020-10-12 15:31:15,101 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 15:31:15,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 15:31:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 15:31:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-12 15:31:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 15:31:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-10-12 15:31:15,107 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-10-12 15:31:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:15,107 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-10-12 15:31:15,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-12 15:31:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-10-12 15:31:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-12 15:31:15,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:15,108 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:15,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 15:31:15,109 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash 783207987, now seen corresponding path program 68 times [2020-10-12 15:31:15,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:15,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637772809] [2020-10-12 15:31:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:15,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:16,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:16,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 15:31:16,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:16,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1174 [2020-10-12 15:31:16,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:16,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-12 15:31:16,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:16,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-12 15:31:16,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:19,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:19,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:19,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:19,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:19,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:19,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:19,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:19,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:19,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:19,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:19,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:19,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637772809] [2020-10-12 15:31:19,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:19,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-12 15:31:19,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270624999] [2020-10-12 15:31:19,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-12 15:31:19,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:19,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-12 15:31:19,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 15:31:19,084 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 71 states. [2020-10-12 15:31:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:19,341 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2020-10-12 15:31:19,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-12 15:31:19,342 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 146 [2020-10-12 15:31:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:19,343 INFO L225 Difference]: With dead ends: 155 [2020-10-12 15:31:19,343 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 15:31:19,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 15:31:19,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 15:31:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-12 15:31:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 15:31:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-10-12 15:31:19,347 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-10-12 15:31:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:19,348 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-10-12 15:31:19,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-12 15:31:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-10-12 15:31:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 15:31:19,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:19,349 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:19,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 15:31:19,349 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:19,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:19,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2116007823, now seen corresponding path program 69 times [2020-10-12 15:31:19,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:19,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453364040] [2020-10-12 15:31:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:19,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:20,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:20,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-12 15:31:20,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:20,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-12 15:31:20,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:20,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-12 15:31:20,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:20,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-12 15:31:20,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:23,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:23,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:23,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:23,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:23,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:23,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:23,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:23,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453364040] [2020-10-12 15:31:23,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:23,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-12 15:31:23,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126792321] [2020-10-12 15:31:23,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-12 15:31:23,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:23,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-12 15:31:23,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 15:31:23,329 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 72 states. [2020-10-12 15:31:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:23,604 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2020-10-12 15:31:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-12 15:31:23,604 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 148 [2020-10-12 15:31:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:23,605 INFO L225 Difference]: With dead ends: 157 [2020-10-12 15:31:23,605 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 15:31:23,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 15:31:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 15:31:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-12 15:31:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 15:31:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-10-12 15:31:23,609 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-10-12 15:31:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:23,610 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-10-12 15:31:23,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-12 15:31:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-10-12 15:31:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 15:31:23,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:23,611 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:23,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 15:31:23,611 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:23,612 INFO L82 PathProgramCache]: Analyzing trace with hash -828626129, now seen corresponding path program 70 times [2020-10-12 15:31:23,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:23,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141454031] [2020-10-12 15:31:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:23,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:24,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:24,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 15:31:24,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:24,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1197 [2020-10-12 15:31:24,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-12 15:31:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-12 15:31:24,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:27,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:27,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:27,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:27,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:27,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:27,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:27,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:27,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:27,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:27,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:27,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:27,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141454031] [2020-10-12 15:31:27,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:27,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-12 15:31:27,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406305652] [2020-10-12 15:31:27,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-12 15:31:27,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:27,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-12 15:31:27,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 15:31:27,801 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 73 states. [2020-10-12 15:31:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:28,161 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2020-10-12 15:31:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-12 15:31:28,162 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 150 [2020-10-12 15:31:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:28,163 INFO L225 Difference]: With dead ends: 159 [2020-10-12 15:31:28,163 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 15:31:28,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 15:31:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 15:31:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-12 15:31:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 15:31:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-10-12 15:31:28,169 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-10-12 15:31:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:28,169 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-10-12 15:31:28,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-12 15:31:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-10-12 15:31:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 15:31:28,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:28,171 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:28,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 15:31:28,172 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:28,172 INFO L82 PathProgramCache]: Analyzing trace with hash -605399443, now seen corresponding path program 71 times [2020-10-12 15:31:28,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:28,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333041313] [2020-10-12 15:31:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:28,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:30,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:30,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 15:31:30,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:30,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-10-12 15:31:30,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:30,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-12 15:31:30,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:30,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-12 15:31:30,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:33,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:33,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:33,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:33,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:33,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:33,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:33,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:33,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:33,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:33,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:33,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:33,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333041313] [2020-10-12 15:31:33,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:33,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-12 15:31:33,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943329022] [2020-10-12 15:31:33,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-12 15:31:33,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:33,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-12 15:31:33,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 15:31:33,131 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 74 states. [2020-10-12 15:31:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:33,461 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-10-12 15:31:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 15:31:33,462 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 152 [2020-10-12 15:31:33,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:33,462 INFO L225 Difference]: With dead ends: 161 [2020-10-12 15:31:33,463 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 15:31:33,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 15:31:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 15:31:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-12 15:31:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 15:31:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-10-12 15:31:33,467 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-10-12 15:31:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:33,467 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-10-12 15:31:33,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-12 15:31:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-10-12 15:31:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-12 15:31:33,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:33,468 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:33,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 15:31:33,469 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:33,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:33,469 INFO L82 PathProgramCache]: Analyzing trace with hash -832918997, now seen corresponding path program 72 times [2020-10-12 15:31:33,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:33,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728170428] [2020-10-12 15:31:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:33,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:34,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:34,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-12 15:31:34,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:34,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1254 [2020-10-12 15:31:34,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:34,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-12 15:31:34,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:34,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-12 15:31:34,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:37,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:37,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:37,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:37,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:37,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:37,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:37,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:37,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728170428] [2020-10-12 15:31:37,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:37,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-12 15:31:37,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26957701] [2020-10-12 15:31:37,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-12 15:31:37,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-12 15:31:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 15:31:37,918 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 75 states. [2020-10-12 15:31:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:38,228 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-10-12 15:31:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-12 15:31:38,230 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 154 [2020-10-12 15:31:38,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:38,230 INFO L225 Difference]: With dead ends: 163 [2020-10-12 15:31:38,231 INFO L226 Difference]: Without dead ends: 158 [2020-10-12 15:31:38,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 15:31:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-12 15:31:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-12 15:31:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 15:31:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-10-12 15:31:38,234 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-10-12 15:31:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:38,234 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-10-12 15:31:38,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-12 15:31:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-10-12 15:31:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 15:31:38,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:38,235 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:38,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 15:31:38,236 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash -435878295, now seen corresponding path program 73 times [2020-10-12 15:31:38,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:38,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447613930] [2020-10-12 15:31:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:38,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:39,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:39,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-12 15:31:39,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:39,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-12 15:31:39,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-12 15:31:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-12 15:31:39,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:42,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:42,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:42,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:42,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:42,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:42,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:42,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:42,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:42,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:42,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:42,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:42,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447613930] [2020-10-12 15:31:42,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:42,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-12 15:31:42,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270300839] [2020-10-12 15:31:42,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-12 15:31:42,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:42,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-12 15:31:42,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 15:31:42,783 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 76 states. [2020-10-12 15:31:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:43,116 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2020-10-12 15:31:43,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-12 15:31:43,117 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 156 [2020-10-12 15:31:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:43,118 INFO L225 Difference]: With dead ends: 165 [2020-10-12 15:31:43,118 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 15:31:43,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 15:31:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 15:31:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-12 15:31:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 15:31:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-10-12 15:31:43,122 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-10-12 15:31:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:43,122 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-10-12 15:31:43,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-12 15:31:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-10-12 15:31:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-12 15:31:43,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:43,123 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:43,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-12 15:31:43,124 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:43,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1131853017, now seen corresponding path program 74 times [2020-10-12 15:31:43,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:43,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733159418] [2020-10-12 15:31:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:43,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:44,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:44,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 15:31:44,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:44,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1473 [2020-10-12 15:31:44,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-12 15:31:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-12 15:31:44,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:47,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:47,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:47,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:47,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:47,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:47,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:31:47,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:47,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:47,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:47,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:47,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:47,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733159418] [2020-10-12 15:31:47,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:47,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-12 15:31:47,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040389153] [2020-10-12 15:31:47,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-12 15:31:47,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:47,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-12 15:31:47,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 15:31:47,993 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 77 states. [2020-10-12 15:31:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:48,353 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2020-10-12 15:31:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-12 15:31:48,354 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 158 [2020-10-12 15:31:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:48,355 INFO L225 Difference]: With dead ends: 167 [2020-10-12 15:31:48,355 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 15:31:48,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 15:31:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 15:31:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-12 15:31:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 15:31:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-10-12 15:31:48,359 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-10-12 15:31:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:48,359 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-10-12 15:31:48,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-12 15:31:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-10-12 15:31:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-12 15:31:48,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:48,361 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:48,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-12 15:31:48,361 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash 51337317, now seen corresponding path program 75 times [2020-10-12 15:31:48,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:48,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159975600] [2020-10-12 15:31:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:48,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:49,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:49,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-12 15:31:49,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:49,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1367 [2020-10-12 15:31:49,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:49,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-12 15:31:49,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:49,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-12 15:31:49,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:53,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:53,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:53,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:53,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:53,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:53,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:53,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:53,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:53,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159975600] [2020-10-12 15:31:53,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:53,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-12 15:31:53,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363649230] [2020-10-12 15:31:53,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-12 15:31:53,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:53,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-12 15:31:53,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 15:31:53,252 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 78 states. [2020-10-12 15:31:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:53,578 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2020-10-12 15:31:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-12 15:31:53,579 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 160 [2020-10-12 15:31:53,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:53,580 INFO L225 Difference]: With dead ends: 169 [2020-10-12 15:31:53,581 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 15:31:53,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 15:31:53,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 15:31:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-10-12 15:31:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 15:31:53,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-10-12 15:31:53,586 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-10-12 15:31:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:53,586 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-10-12 15:31:53,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-12 15:31:53,586 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-10-12 15:31:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-12 15:31:53,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:53,587 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:53,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-12 15:31:53,587 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:53,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1069085149, now seen corresponding path program 76 times [2020-10-12 15:31:53,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:53,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519936769] [2020-10-12 15:31:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:53,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:55,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:55,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-12 15:31:55,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:55,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1484 [2020-10-12 15:31:55,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:55,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-12 15:31:55,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:31:55,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-12 15:31:55,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:58,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:31:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:58,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:31:58,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:31:58,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:31:58,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:31:58,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:31:58,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:31:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:31:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:31:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:31:58,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:31:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:31:58,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519936769] [2020-10-12 15:31:58,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:31:58,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-12 15:31:58,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688090621] [2020-10-12 15:31:58,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-12 15:31:58,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:31:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-12 15:31:58,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 15:31:58,701 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 79 states. [2020-10-12 15:31:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:31:59,085 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-10-12 15:31:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-12 15:31:59,085 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 162 [2020-10-12 15:31:59,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:31:59,086 INFO L225 Difference]: With dead ends: 171 [2020-10-12 15:31:59,087 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 15:31:59,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 15:31:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 15:31:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-12 15:31:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-12 15:31:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-10-12 15:31:59,091 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-10-12 15:31:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:31:59,091 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-10-12 15:31:59,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-12 15:31:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-10-12 15:31:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-12 15:31:59,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:31:59,093 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:31:59,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-12 15:31:59,093 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:31:59,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:31:59,094 INFO L82 PathProgramCache]: Analyzing trace with hash 241716321, now seen corresponding path program 77 times [2020-10-12 15:31:59,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:31:59,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260649275] [2020-10-12 15:31:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:31:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:31:59,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:00,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:00,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-12 15:32:00,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:00,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1611 [2020-10-12 15:32:00,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-12 15:32:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-12 15:32:00,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:04,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:04,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:04,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:04,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:32:04,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:04,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:32:04,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:04,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:04,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:04,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:04,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:04,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260649275] [2020-10-12 15:32:04,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:32:04,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-12 15:32:04,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353463197] [2020-10-12 15:32:04,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-12 15:32:04,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:04,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-12 15:32:04,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 15:32:04,417 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 80 states. [2020-10-12 15:32:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:04,788 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2020-10-12 15:32:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-12 15:32:04,788 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 164 [2020-10-12 15:32:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:04,789 INFO L225 Difference]: With dead ends: 173 [2020-10-12 15:32:04,789 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 15:32:04,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 15:32:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 15:32:04,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-10-12 15:32:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-12 15:32:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-10-12 15:32:04,793 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-10-12 15:32:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:04,794 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-10-12 15:32:04,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-12 15:32:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-10-12 15:32:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 15:32:04,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:04,795 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:04,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-12 15:32:04,795 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:04,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1496511263, now seen corresponding path program 78 times [2020-10-12 15:32:04,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:04,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006727492] [2020-10-12 15:32:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:04,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:06,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:06,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 15:32:06,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:06,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1494 [2020-10-12 15:32:06,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:06,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-12 15:32:06,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:06,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-12 15:32:06,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:10,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:10,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:10,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:10,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:32:10,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:10,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:32:10,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:10,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:10,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:10,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:10,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:10,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006727492] [2020-10-12 15:32:10,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:32:10,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-12 15:32:10,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768002834] [2020-10-12 15:32:10,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-12 15:32:10,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-12 15:32:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 15:32:10,109 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 81 states. [2020-10-12 15:32:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:10,447 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2020-10-12 15:32:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-12 15:32:10,448 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 166 [2020-10-12 15:32:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:10,449 INFO L225 Difference]: With dead ends: 175 [2020-10-12 15:32:10,449 INFO L226 Difference]: Without dead ends: 170 [2020-10-12 15:32:10,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 15:32:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-12 15:32:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-12 15:32:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 15:32:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-10-12 15:32:10,454 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-10-12 15:32:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:10,454 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-10-12 15:32:10,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-12 15:32:10,454 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-10-12 15:32:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-12 15:32:10,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:10,455 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:10,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-12 15:32:10,456 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 468640349, now seen corresponding path program 79 times [2020-10-12 15:32:10,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:10,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995049857] [2020-10-12 15:32:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:10,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:12,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:12,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-12 15:32:12,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:12,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1554 [2020-10-12 15:32:12,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-12 15:32:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-12 15:32:12,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:15,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:15,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:15,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:15,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:32:15,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:15,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:32:15,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:15,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:15,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995049857] [2020-10-12 15:32:15,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:32:15,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-12 15:32:15,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183254961] [2020-10-12 15:32:15,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-12 15:32:15,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:15,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-12 15:32:15,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 15:32:15,969 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 82 states. [2020-10-12 15:32:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:16,370 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2020-10-12 15:32:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-12 15:32:16,371 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 168 [2020-10-12 15:32:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:16,372 INFO L225 Difference]: With dead ends: 177 [2020-10-12 15:32:16,372 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 15:32:16,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 15:32:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 15:32:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-10-12 15:32:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 15:32:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-10-12 15:32:16,379 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-10-12 15:32:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:16,379 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-10-12 15:32:16,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-12 15:32:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-10-12 15:32:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-12 15:32:16,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:16,380 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:16,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-12 15:32:16,381 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:16,381 INFO L82 PathProgramCache]: Analyzing trace with hash 527170075, now seen corresponding path program 80 times [2020-10-12 15:32:16,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:16,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356287097] [2020-10-12 15:32:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:16,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:17,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:17,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-12 15:32:17,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:17,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1575 [2020-10-12 15:32:17,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:17,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-12 15:32:17,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:17,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-12 15:32:17,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:22,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:22,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:22,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:22,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:32:22,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:22,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:32:22,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:22,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:22,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:22,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:22,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:22,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356287097] [2020-10-12 15:32:22,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:32:22,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-12 15:32:22,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695851011] [2020-10-12 15:32:22,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-12 15:32:22,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:22,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-12 15:32:22,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 15:32:22,065 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 83 states. [2020-10-12 15:32:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:22,443 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2020-10-12 15:32:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-12 15:32:22,444 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 170 [2020-10-12 15:32:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:22,445 INFO L225 Difference]: With dead ends: 179 [2020-10-12 15:32:22,445 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 15:32:22,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 15:32:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 15:32:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-12 15:32:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-12 15:32:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-10-12 15:32:22,449 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-10-12 15:32:22,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:22,450 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-10-12 15:32:22,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-12 15:32:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-10-12 15:32:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-12 15:32:22,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:22,451 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:22,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-12 15:32:22,451 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:22,452 INFO L82 PathProgramCache]: Analyzing trace with hash 939661913, now seen corresponding path program 81 times [2020-10-12 15:32:22,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:22,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787844530] [2020-10-12 15:32:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:22,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:24,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:24,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-12 15:32:24,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:24,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-12 15:32:24,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:24,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-12 15:32:24,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-12 15:32:24,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:28,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:28,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:28,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:28,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:32:28,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:28,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:32:28,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:28,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:28,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787844530] [2020-10-12 15:32:28,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:32:28,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-12 15:32:28,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594696863] [2020-10-12 15:32:28,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-12 15:32:28,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:28,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-12 15:32:28,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-12 15:32:28,344 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 84 states. [2020-10-12 15:32:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:28,718 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-10-12 15:32:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-12 15:32:28,719 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 172 [2020-10-12 15:32:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:28,721 INFO L225 Difference]: With dead ends: 181 [2020-10-12 15:32:28,721 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 15:32:28,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-12 15:32:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 15:32:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-12 15:32:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-12 15:32:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-10-12 15:32:28,725 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-10-12 15:32:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:28,726 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-10-12 15:32:28,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-12 15:32:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-10-12 15:32:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-12 15:32:28,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:28,727 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:28,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-12 15:32:28,727 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2087640297, now seen corresponding path program 82 times [2020-10-12 15:32:28,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:28,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018726792] [2020-10-12 15:32:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:28,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:30,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:30,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 15:32:30,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:30,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1697 [2020-10-12 15:32:30,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:30,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-12 15:32:30,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:30,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-12 15:32:30,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:34,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:34,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:34,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:34,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:32:34,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:34,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:32:34,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:34,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:34,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018726792] [2020-10-12 15:32:34,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:32:34,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-12 15:32:34,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190059524] [2020-10-12 15:32:34,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-12 15:32:34,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:34,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-12 15:32:34,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 15:32:34,789 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 85 states. [2020-10-12 15:32:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:35,155 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2020-10-12 15:32:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-12 15:32:35,156 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 174 [2020-10-12 15:32:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:35,157 INFO L225 Difference]: With dead ends: 183 [2020-10-12 15:32:35,157 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 15:32:35,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 15:32:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 15:32:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-12 15:32:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 15:32:35,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-10-12 15:32:35,162 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-10-12 15:32:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:35,162 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-10-12 15:32:35,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-12 15:32:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-10-12 15:32:35,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 15:32:35,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:35,164 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:35,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-12 15:32:35,164 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash 662762581, now seen corresponding path program 83 times [2020-10-12 15:32:35,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:35,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846643392] [2020-10-12 15:32:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:35,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:36,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:36,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-12 15:32:36,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:36,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1762 [2020-10-12 15:32:36,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:36,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 85 [2020-10-12 15:32:36,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:36,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-12 15:32:36,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:41,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:41,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:41,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:41,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:32:41,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:32:41,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:41,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:41,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:41,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:41,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846643392] [2020-10-12 15:32:41,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:32:41,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-12 15:32:41,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928481969] [2020-10-12 15:32:41,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-12 15:32:41,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-12 15:32:41,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 15:32:41,371 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 86 states. [2020-10-12 15:32:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:41,765 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2020-10-12 15:32:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-12 15:32:41,766 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 176 [2020-10-12 15:32:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:41,767 INFO L225 Difference]: With dead ends: 185 [2020-10-12 15:32:41,767 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 15:32:41,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 15:32:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 15:32:41,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-10-12 15:32:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 15:32:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-10-12 15:32:41,771 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-10-12 15:32:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:41,771 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-10-12 15:32:41,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-12 15:32:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-10-12 15:32:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-12 15:32:41,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:41,772 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:41,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-12 15:32:41,773 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1899925997, now seen corresponding path program 84 times [2020-10-12 15:32:41,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:41,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376318667] [2020-10-12 15:32:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:41,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:43,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:43,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-12 15:32:43,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:43,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1729 [2020-10-12 15:32:43,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-12 15:32:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-12 15:32:43,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:48,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:48,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:48,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:48,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:32:48,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:48,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:32:48,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:48,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:48,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:48,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:48,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376318667] [2020-10-12 15:32:48,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:32:48,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-10-12 15:32:48,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626662216] [2020-10-12 15:32:48,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-12 15:32:48,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:48,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-12 15:32:48,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 15:32:48,141 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 87 states. [2020-10-12 15:32:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:48,493 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2020-10-12 15:32:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-12 15:32:48,494 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 178 [2020-10-12 15:32:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:48,495 INFO L225 Difference]: With dead ends: 187 [2020-10-12 15:32:48,496 INFO L226 Difference]: Without dead ends: 182 [2020-10-12 15:32:48,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 15:32:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-12 15:32:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-12 15:32:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 15:32:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-10-12 15:32:48,500 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2020-10-12 15:32:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:48,501 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-10-12 15:32:48,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-12 15:32:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-10-12 15:32:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-12 15:32:48,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:48,502 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:48,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-12 15:32:48,502 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:48,503 INFO L82 PathProgramCache]: Analyzing trace with hash 667578449, now seen corresponding path program 85 times [2020-10-12 15:32:48,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:48,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194725995] [2020-10-12 15:32:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:48,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:50,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:50,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-12 15:32:50,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:50,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1777 [2020-10-12 15:32:50,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:50,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 87 [2020-10-12 15:32:50,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:50,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-12 15:32:50,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:55,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:55,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:55,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:55,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:32:55,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:55,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:32:55,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:55,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:55,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194725995] [2020-10-12 15:32:55,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:32:55,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-12 15:32:55,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847799329] [2020-10-12 15:32:55,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-12 15:32:55,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:55,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-12 15:32:55,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-12 15:32:55,039 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 88 states. [2020-10-12 15:32:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:55,418 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2020-10-12 15:32:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-12 15:32:55,419 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 180 [2020-10-12 15:32:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:55,420 INFO L225 Difference]: With dead ends: 189 [2020-10-12 15:32:55,420 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 15:32:55,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-12 15:32:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 15:32:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-10-12 15:32:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 15:32:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-10-12 15:32:55,425 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2020-10-12 15:32:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:55,425 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-10-12 15:32:55,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-12 15:32:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-10-12 15:32:55,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-12 15:32:55,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:55,427 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:55,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-12 15:32:55,427 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:55,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1566844145, now seen corresponding path program 86 times [2020-10-12 15:32:55,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:55,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422541390] [2020-10-12 15:32:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:57,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:57,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-12 15:32:57,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1856 [2020-10-12 15:32:57,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-12 15:32:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:32:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-12 15:32:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:33:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:33:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:33:02,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:33:02,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:33:02,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 15:33:02,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:33:02,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:33:02,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:33:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:33:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:33:02,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:33:02,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:33:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:33:02,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422541390] [2020-10-12 15:33:02,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:33:02,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-10-12 15:33:02,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186472604] [2020-10-12 15:33:02,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-12 15:33:02,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:33:02,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-12 15:33:02,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 15:33:02,182 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 89 states. [2020-10-12 15:33:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:33:02,586 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-10-12 15:33:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-12 15:33:02,587 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 182 [2020-10-12 15:33:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:33:02,588 INFO L225 Difference]: With dead ends: 191 [2020-10-12 15:33:02,588 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 15:33:02,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 15:33:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 15:33:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-10-12 15:33:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 15:33:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-10-12 15:33:02,593 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2020-10-12 15:33:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:33:02,593 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-10-12 15:33:02,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-12 15:33:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-10-12 15:33:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-12 15:33:02,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:33:02,594 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:33:02,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-12 15:33:02,595 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:33:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:33:02,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1363308979, now seen corresponding path program 87 times [2020-10-12 15:33:02,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:33:02,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549920880] [2020-10-12 15:33:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:33:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:33:02,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:33:04,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:33:04,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-12 15:33:04,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:33:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1869 [2020-10-12 15:33:04,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:33:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 89 [2020-10-12 15:33:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 15:33:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-12 15:33:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0