/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:19:12,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:19:12,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:19:12,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:19:12,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:19:12,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:19:12,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:19:12,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:19:12,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:19:12,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:19:12,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:19:12,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:19:12,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:19:12,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:19:12,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:19:13,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:19:13,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:19:13,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:19:13,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:19:13,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:19:13,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:19:13,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:19:13,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:19:13,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:19:13,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:19:13,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:19:13,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:19:13,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:19:13,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:19:13,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:19:13,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:19:13,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:19:13,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:19:13,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:19:13,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:19:13,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:19:13,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:19:13,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:19:13,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:19:13,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:19:13,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:19:13,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 16:19:13,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:19:13,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:19:13,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:19:13,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:19:13,055 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:19:13,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:19:13,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:19:13,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:19:13,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:19:13,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:19:13,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:19:13,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:19:13,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:19:13,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:19:13,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:19:13,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:19:13,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:19:13,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:19:13,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:19:13,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:19:13,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:19:13,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:19:13,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:19:13,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:19:13,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:19:13,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:19:13,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:19:13,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:19:13,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:19:13,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:19:13,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:19:13,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:19:13,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:19:13,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:19:13,387 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:19:13,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2020-10-12 16:19:13,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d7710258/b4336cf8f8af440ab0b0d13de8016a87/FLAG466b97295 [2020-10-12 16:19:13,891 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:19:13,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2020-10-12 16:19:13,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d7710258/b4336cf8f8af440ab0b0d13de8016a87/FLAG466b97295 [2020-10-12 16:19:14,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d7710258/b4336cf8f8af440ab0b0d13de8016a87 [2020-10-12 16:19:14,274 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:19:14,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:19:14,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:19:14,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:19:14,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:19:14,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:19:14" (1/1) ... [2020-10-12 16:19:14,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722dc2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14, skipping insertion in model container [2020-10-12 16:19:14,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:19:14" (1/1) ... [2020-10-12 16:19:14,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:19:14,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:19:14,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:19:14,485 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:19:14,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:19:14,519 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:19:14,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14 WrapperNode [2020-10-12 16:19:14,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:19:14,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:19:14,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:19:14,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:19:14,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14" (1/1) ... [2020-10-12 16:19:14,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14" (1/1) ... [2020-10-12 16:19:14,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14" (1/1) ... [2020-10-12 16:19:14,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14" (1/1) ... [2020-10-12 16:19:14,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14" (1/1) ... [2020-10-12 16:19:14,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14" (1/1) ... [2020-10-12 16:19:14,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14" (1/1) ... [2020-10-12 16:19:14,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:19:14,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:19:14,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:19:14,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:19:14,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:19:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:19:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:19:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:19:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:19:14,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:19:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:19:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:19:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:19:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:19:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:19:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:19:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:19:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:19:14,894 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:19:14,894 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 16:19:14,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:19:14 BoogieIcfgContainer [2020-10-12 16:19:14,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:19:14,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:19:14,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:19:14,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:19:14,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:19:14" (1/3) ... [2020-10-12 16:19:14,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694bddb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:19:14, skipping insertion in model container [2020-10-12 16:19:14,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:14" (2/3) ... [2020-10-12 16:19:14,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694bddb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:19:14, skipping insertion in model container [2020-10-12 16:19:14,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:19:14" (3/3) ... [2020-10-12 16:19:14,906 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2020-10-12 16:19:14,916 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:19:14,923 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:19:14,934 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:19:14,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:19:14,955 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:19:14,955 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:19:14,955 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:19:14,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:19:14,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:19:14,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:19:14,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:19:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-12 16:19:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:19:14,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:14,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:14,978 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1722053448, now seen corresponding path program 1 times [2020-10-12 16:19:14,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:14,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70295675] [2020-10-12 16:19:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:15,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:15,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:19:15,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:19:15,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-12 16:19:15,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 16:19:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:15,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:19:15,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:15,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:15,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:15,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:15,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 16:19:15,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:15,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:15,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:15,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:15,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:15,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 16:19:15,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:15,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:15,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 16:19:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:15,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70295675] [2020-10-12 16:19:15,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:19:15,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:19:15,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94540864] [2020-10-12 16:19:15,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:19:15,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:19:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:19:15,660 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-10-12 16:19:15,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:15,794 INFO L93 Difference]: Finished difference Result 55 states and 83 transitions. [2020-10-12 16:19:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:19:15,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-12 16:19:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:15,806 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:19:15,806 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:19:15,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:19:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:19:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-12 16:19:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:19:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-12 16:19:15,852 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21 [2020-10-12 16:19:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:15,852 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-12 16:19:15,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:19:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-12 16:19:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:19:15,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:15,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:15,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:19:15,855 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1770070695, now seen corresponding path program 1 times [2020-10-12 16:19:15,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:15,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837396267] [2020-10-12 16:19:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:15,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:16,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:19:16,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:16,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-12 16:19:16,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:19:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:19:16,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:16,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:16,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:16,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:19:16,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:16,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:16,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:16,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:16,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:16,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:16,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:16,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:19:16,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:16,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:16,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:16,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:16,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:16,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837396267] [2020-10-12 16:19:16,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:19:16,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:19:16,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592096427] [2020-10-12 16:19:16,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:19:16,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:19:16,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:19:16,121 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-10-12 16:19:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:16,258 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-12 16:19:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:19:16,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-12 16:19:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:16,260 INFO L225 Difference]: With dead ends: 48 [2020-10-12 16:19:16,260 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:19:16,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:19:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:19:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-12 16:19:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:19:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-12 16:19:16,269 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-10-12 16:19:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:16,269 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-12 16:19:16,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:19:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-12 16:19:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:19:16,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:16,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:16,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:19:16,272 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:16,273 INFO L82 PathProgramCache]: Analyzing trace with hash -810909125, now seen corresponding path program 1 times [2020-10-12 16:19:16,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:16,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530995750] [2020-10-12 16:19:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:16,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:16,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:19:16,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:19:16,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-12 16:19:16,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:16,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:19:16,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:19:16,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:19:16,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:16,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:16,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:16,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:16,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:16,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:16,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:16,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:16,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:16,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:16,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:16,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:16,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:16,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:16,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:16,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 16:19:16,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:16,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:19:16,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:19:16,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:16,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530995750] [2020-10-12 16:19:16,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:19:16,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 16:19:16,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033387735] [2020-10-12 16:19:16,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:19:16,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:16,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:19:16,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:19:16,989 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 7 states. [2020-10-12 16:19:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:17,151 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-10-12 16:19:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:19:17,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-12 16:19:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:17,153 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:19:17,153 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:19:17,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:19:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:19:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-12 16:19:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:19:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-12 16:19:17,161 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-10-12 16:19:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:17,162 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-12 16:19:17,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:19:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-12 16:19:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:19:17,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:17,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:17,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:19:17,164 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:17,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1203936135, now seen corresponding path program 1 times [2020-10-12 16:19:17,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:17,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551816987] [2020-10-12 16:19:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:17,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:17,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:19:17,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:17,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 16:19:17,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:19:17,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:17,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:19:17,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:17,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:17,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:17,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:17,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:17,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:17,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:17,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:17,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:17,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:17,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:17,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:17,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:17,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:17,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:17,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:17,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:17,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:17,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:17,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:17,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:17,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551816987] [2020-10-12 16:19:17,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:17,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:19:17,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054220113] [2020-10-12 16:19:17,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:19:17,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:19:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:19:17,290 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 6 states. [2020-10-12 16:19:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:17,410 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-12 16:19:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:19:17,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-12 16:19:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:17,412 INFO L225 Difference]: With dead ends: 53 [2020-10-12 16:19:17,412 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:19:17,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:19:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:19:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-12 16:19:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:19:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-12 16:19:17,420 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2020-10-12 16:19:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:17,420 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-12 16:19:17,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:19:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-12 16:19:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:19:17,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:17,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:17,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:19:17,422 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:17,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:17,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1431967529, now seen corresponding path program 1 times [2020-10-12 16:19:17,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:17,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380216036] [2020-10-12 16:19:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:17,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:17,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:19:17,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:19:17,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-12 16:19:17,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:17,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:19:17,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:19:17,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:19:17,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:17,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:17,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:17,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:17,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:17,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:17,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:17,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:17,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:17,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:17,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:17,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:17,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:17,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:17,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:17,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 16:19:17,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:17,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:19:17,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:17,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:19:18,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:18,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380216036] [2020-10-12 16:19:18,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:18,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:19:18,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107945439] [2020-10-12 16:19:18,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:19:18,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:18,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:19:18,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:19:18,026 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 10 states. [2020-10-12 16:19:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:18,353 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2020-10-12 16:19:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:19:18,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-12 16:19:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:18,356 INFO L225 Difference]: With dead ends: 74 [2020-10-12 16:19:18,356 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:19:18,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:19:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:19:18,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-12 16:19:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:19:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-12 16:19:18,366 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 27 [2020-10-12 16:19:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:18,366 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-12 16:19:18,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:19:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-12 16:19:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:19:18,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:18,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:18,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:19:18,368 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:18,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1038940519, now seen corresponding path program 2 times [2020-10-12 16:19:18,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:18,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366921276] [2020-10-12 16:19:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:18,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:18,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:19:18,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:18,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-12 16:19:18,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:18,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:19:18,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:18,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:19:18,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:18,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:18,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:18,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:18,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:18,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:18,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:18,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:18,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:18,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:18,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:18,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:18,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:18,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:18,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:18,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 16:19:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:18,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366921276] [2020-10-12 16:19:18,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:18,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:19:18,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288547169] [2020-10-12 16:19:18,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:19:18,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:18,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:19:18,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:19:18,518 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 7 states. [2020-10-12 16:19:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:18,676 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-10-12 16:19:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:19:18,677 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-12 16:19:18,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:18,678 INFO L225 Difference]: With dead ends: 81 [2020-10-12 16:19:18,678 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:19:18,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:19:18,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:19:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-10-12 16:19:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:19:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-10-12 16:19:18,685 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 27 [2020-10-12 16:19:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:18,686 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-10-12 16:19:18,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:19:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-10-12 16:19:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:19:18,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:18,687 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:18,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:19:18,688 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:18,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1544018311, now seen corresponding path program 2 times [2020-10-12 16:19:18,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:18,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376191120] [2020-10-12 16:19:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:18,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:19,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:19,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:19:19,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:19,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 915 [2020-10-12 16:19:19,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:19,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:19:19,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:19,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:19:19,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:19,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:19,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:19,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:19,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:19,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:19,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:19,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:19,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:19,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:19,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:19,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:19,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:19,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:19,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:19,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:19,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:19,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:19,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376191120] [2020-10-12 16:19:19,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:19,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:19:19,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159490910] [2020-10-12 16:19:19,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:19:19,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:19:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:19:19,718 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 9 states. [2020-10-12 16:19:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:20,074 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2020-10-12 16:19:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:19:20,075 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-12 16:19:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:20,076 INFO L225 Difference]: With dead ends: 114 [2020-10-12 16:19:20,076 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 16:19:20,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:19:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 16:19:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2020-10-12 16:19:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:19:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-10-12 16:19:20,086 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 30 [2020-10-12 16:19:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:20,087 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-10-12 16:19:20,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:19:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-10-12 16:19:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:19:20,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:20,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:20,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:19:20,090 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:20,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1771115961, now seen corresponding path program 3 times [2020-10-12 16:19:20,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:20,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444607313] [2020-10-12 16:19:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:19:20,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:20,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-12 16:19:20,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:19:20,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:20,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:19:20,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:20,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:20,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:19:20,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:20,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:20,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:20,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:20,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:20,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:20,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:20,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:20,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444607313] [2020-10-12 16:19:20,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:20,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:19:20,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179961179] [2020-10-12 16:19:20,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:19:20,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:20,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:19:20,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:19:20,295 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 8 states. [2020-10-12 16:19:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:20,496 INFO L93 Difference]: Finished difference Result 147 states and 188 transitions. [2020-10-12 16:19:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:19:20,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-12 16:19:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:20,498 INFO L225 Difference]: With dead ends: 147 [2020-10-12 16:19:20,498 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 16:19:20,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:19:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 16:19:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-12 16:19:20,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 16:19:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2020-10-12 16:19:20,509 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 30 [2020-10-12 16:19:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:20,509 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2020-10-12 16:19:20,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:19:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2020-10-12 16:19:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:19:20,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:20,511 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:20,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:19:20,511 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:20,511 INFO L82 PathProgramCache]: Analyzing trace with hash -129187801, now seen corresponding path program 4 times [2020-10-12 16:19:20,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:20,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499330052] [2020-10-12 16:19:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:19:20,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:20,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-12 16:19:20,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:19:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:19:20,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:20,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:20,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:20,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:20,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:20,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:20,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:20,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:20,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:20,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:20,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:20,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:20,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499330052] [2020-10-12 16:19:20,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:20,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:19:20,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724902003] [2020-10-12 16:19:20,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:19:20,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:20,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:19:20,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:19:20,706 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 9 states. [2020-10-12 16:19:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:20,878 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2020-10-12 16:19:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:19:20,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-12 16:19:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:20,880 INFO L225 Difference]: With dead ends: 173 [2020-10-12 16:19:20,880 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 16:19:20,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:19:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 16:19:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-10-12 16:19:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 16:19:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2020-10-12 16:19:20,891 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 33 [2020-10-12 16:19:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:20,891 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2020-10-12 16:19:20,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:19:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2020-10-12 16:19:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:19:20,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:20,892 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:20,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:19:20,893 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:20,893 INFO L82 PathProgramCache]: Analyzing trace with hash 865200057, now seen corresponding path program 3 times [2020-10-12 16:19:20,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:20,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579373623] [2020-10-12 16:19:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:21,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:19:21,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:21,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-12 16:19:21,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:21,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:19:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:19:21,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:21,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:21,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:21,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:21,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:21,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:21,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:21,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:21,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:21,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:21,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:21,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:21,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:21,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:21,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:21,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:21,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:21,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579373623] [2020-10-12 16:19:21,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:21,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:19:21,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691558205] [2020-10-12 16:19:21,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:19:21,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:21,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:19:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:19:21,863 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 11 states. [2020-10-12 16:19:22,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:22,326 INFO L93 Difference]: Finished difference Result 216 states and 273 transitions. [2020-10-12 16:19:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:19:22,327 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-12 16:19:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:22,328 INFO L225 Difference]: With dead ends: 216 [2020-10-12 16:19:22,328 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 16:19:22,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 16:19:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 89. [2020-10-12 16:19:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 16:19:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2020-10-12 16:19:22,339 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 36 [2020-10-12 16:19:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:22,340 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2020-10-12 16:19:22,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:19:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2020-10-12 16:19:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:19:22,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:22,341 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:22,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:19:22,341 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash -114632967, now seen corresponding path program 5 times [2020-10-12 16:19:22,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:22,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345894135] [2020-10-12 16:19:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:22,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:22,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:22,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:19:22,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-12 16:19:22,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:19:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:19:22,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:22,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:22,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:22,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:22,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:22,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:22,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:22,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:22,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:22,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:22,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:22,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:22,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:22,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:22,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:22,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:22,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:22,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345894135] [2020-10-12 16:19:22,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:22,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:19:22,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962242954] [2020-10-12 16:19:22,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:19:22,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:22,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:19:22,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:19:22,548 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 10 states. [2020-10-12 16:19:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:22,817 INFO L93 Difference]: Finished difference Result 194 states and 246 transitions. [2020-10-12 16:19:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:19:22,818 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-12 16:19:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:22,820 INFO L225 Difference]: With dead ends: 194 [2020-10-12 16:19:22,820 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 16:19:22,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:19:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 16:19:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2020-10-12 16:19:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 16:19:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2020-10-12 16:19:22,832 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 36 [2020-10-12 16:19:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:22,832 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2020-10-12 16:19:22,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:19:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2020-10-12 16:19:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:19:22,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:22,834 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:22,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:19:22,834 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash -303270169, now seen corresponding path program 6 times [2020-10-12 16:19:22,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:22,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457371656] [2020-10-12 16:19:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:22,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:22,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:22,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:22,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:19:22,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:22,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-12 16:19:22,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:22,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:19:22,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:22,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:19:22,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:23,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:23,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:23,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:23,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:23,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:23,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:23,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:23,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457371656] [2020-10-12 16:19:23,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:23,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:19:23,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491833687] [2020-10-12 16:19:23,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:19:23,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:23,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:19:23,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:19:23,119 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 11 states. [2020-10-12 16:19:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:23,404 INFO L93 Difference]: Finished difference Result 221 states and 279 transitions. [2020-10-12 16:19:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:19:23,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-12 16:19:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:23,406 INFO L225 Difference]: With dead ends: 221 [2020-10-12 16:19:23,408 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 16:19:23,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:19:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 16:19:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2020-10-12 16:19:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 16:19:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 141 transitions. [2020-10-12 16:19:23,422 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 141 transitions. Word has length 39 [2020-10-12 16:19:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:23,423 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 141 transitions. [2020-10-12 16:19:23,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:19:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 141 transitions. [2020-10-12 16:19:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:19:23,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:23,427 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:23,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:19:23,428 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:23,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1197098759, now seen corresponding path program 4 times [2020-10-12 16:19:23,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:23,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444042366] [2020-10-12 16:19:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:24,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:24,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:19:24,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:24,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-10-12 16:19:24,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:24,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:19:24,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:24,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:19:24,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:24,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:24,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:24,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:24,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:24,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:24,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:24,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:24,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:24,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:24,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:24,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:24,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:24,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:24,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:24,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:24,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:24,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444042366] [2020-10-12 16:19:24,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:24,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:19:24,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664643552] [2020-10-12 16:19:24,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:19:24,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:19:24,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:19:24,435 INFO L87 Difference]: Start difference. First operand 114 states and 141 transitions. Second operand 13 states. [2020-10-12 16:19:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:25,247 INFO L93 Difference]: Finished difference Result 275 states and 348 transitions. [2020-10-12 16:19:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:19:25,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-12 16:19:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:25,250 INFO L225 Difference]: With dead ends: 275 [2020-10-12 16:19:25,250 INFO L226 Difference]: Without dead ends: 173 [2020-10-12 16:19:25,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:19:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-12 16:19:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 154. [2020-10-12 16:19:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 16:19:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2020-10-12 16:19:25,264 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 42 [2020-10-12 16:19:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:25,265 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2020-10-12 16:19:25,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:19:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2020-10-12 16:19:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:19:25,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:25,267 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:25,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:19:25,267 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:25,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:25,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2118035513, now seen corresponding path program 7 times [2020-10-12 16:19:25,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:25,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111048773] [2020-10-12 16:19:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:25,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:25,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:25,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:25,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:19:25,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:25,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-12 16:19:25,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:25,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:19:25,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:25,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:19:25,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:25,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:25,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:25,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:25,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:25,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:25,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:25,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:25,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:25,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:25,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:25,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:25,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:25,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:25,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:25,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:25,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:25,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:25,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:25,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:25,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:25,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:25,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:25,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111048773] [2020-10-12 16:19:25,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:25,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:19:25,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16974111] [2020-10-12 16:19:25,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:19:25,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:19:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:19:25,531 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand 12 states. [2020-10-12 16:19:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:25,821 INFO L93 Difference]: Finished difference Result 340 states and 435 transitions. [2020-10-12 16:19:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:19:25,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-12 16:19:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:25,823 INFO L225 Difference]: With dead ends: 340 [2020-10-12 16:19:25,823 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 16:19:25,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:19:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 16:19:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 173. [2020-10-12 16:19:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-12 16:19:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 217 transitions. [2020-10-12 16:19:25,836 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 217 transitions. Word has length 42 [2020-10-12 16:19:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:25,836 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 217 transitions. [2020-10-12 16:19:25,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:19:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 217 transitions. [2020-10-12 16:19:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:19:25,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:25,837 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:25,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:19:25,838 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:25,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1259871655, now seen corresponding path program 8 times [2020-10-12 16:19:25,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:25,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863679333] [2020-10-12 16:19:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:25,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:25,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:25,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 16:19:25,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:25,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-12 16:19:25,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:25,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:19:25,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:25,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:19:25,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:26,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:26,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:26,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:26,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:26,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:26,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:26,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:26,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:26,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:26,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:26,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:26,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:26,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:26,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:26,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:26,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:26,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:26,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863679333] [2020-10-12 16:19:26,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:26,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:19:26,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279516117] [2020-10-12 16:19:26,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:19:26,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:26,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:19:26,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:19:26,101 INFO L87 Difference]: Start difference. First operand 173 states and 217 transitions. Second operand 13 states. [2020-10-12 16:19:26,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:26,455 INFO L93 Difference]: Finished difference Result 384 states and 488 transitions. [2020-10-12 16:19:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:19:26,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-12 16:19:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:26,457 INFO L225 Difference]: With dead ends: 384 [2020-10-12 16:19:26,457 INFO L226 Difference]: Without dead ends: 223 [2020-10-12 16:19:26,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:19:26,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-12 16:19:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 196. [2020-10-12 16:19:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 16:19:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 245 transitions. [2020-10-12 16:19:26,476 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 245 transitions. Word has length 45 [2020-10-12 16:19:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:26,476 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 245 transitions. [2020-10-12 16:19:26,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:19:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 245 transitions. [2020-10-12 16:19:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:19:26,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:26,478 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:26,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:19:26,478 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash 325556793, now seen corresponding path program 5 times [2020-10-12 16:19:26,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:26,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017540382] [2020-10-12 16:19:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:26,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:27,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:27,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:19:27,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-12 16:19:27,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:19:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:19:27,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:27,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:27,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:27,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:27,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:27,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:27,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:27,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:27,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:27,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:27,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:27,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:27,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:27,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:27,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:27,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:27,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:27,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:27,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:27,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:27,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:27,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:27,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017540382] [2020-10-12 16:19:27,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:27,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:19:27,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143040222] [2020-10-12 16:19:27,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:19:27,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:27,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:19:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:19:27,529 INFO L87 Difference]: Start difference. First operand 196 states and 245 transitions. Second operand 15 states. [2020-10-12 16:19:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:28,335 INFO L93 Difference]: Finished difference Result 441 states and 559 transitions. [2020-10-12 16:19:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:19:28,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-12 16:19:28,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:28,337 INFO L225 Difference]: With dead ends: 441 [2020-10-12 16:19:28,337 INFO L226 Difference]: Without dead ends: 255 [2020-10-12 16:19:28,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:19:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-12 16:19:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 137. [2020-10-12 16:19:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 16:19:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-10-12 16:19:28,361 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 48 [2020-10-12 16:19:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:28,361 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-10-12 16:19:28,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:19:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-10-12 16:19:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:19:28,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:28,362 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:28,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:19:28,362 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash -654276231, now seen corresponding path program 9 times [2020-10-12 16:19:28,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:28,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689616856] [2020-10-12 16:19:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:28,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:28,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:28,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:28,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:19:28,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:28,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-12 16:19:28,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:28,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:19:28,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:19:28,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:28,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:28,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:28,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:28,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:28,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:28,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:28,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:28,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:28,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:28,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:28,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:28,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:28,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:28,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:28,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:28,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:28,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:28,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:28,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:28,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:28,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:28,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:28,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689616856] [2020-10-12 16:19:28,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:28,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:19:28,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383605317] [2020-10-12 16:19:28,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:19:28,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:28,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:19:28,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:19:28,653 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 14 states. [2020-10-12 16:19:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:28,922 INFO L93 Difference]: Finished difference Result 290 states and 366 transitions. [2020-10-12 16:19:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:19:28,922 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-12 16:19:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:28,923 INFO L225 Difference]: With dead ends: 290 [2020-10-12 16:19:28,924 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 16:19:28,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 16:19:28,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2020-10-12 16:19:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-12 16:19:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 184 transitions. [2020-10-12 16:19:28,940 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 184 transitions. Word has length 48 [2020-10-12 16:19:28,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:28,940 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 184 transitions. [2020-10-12 16:19:28,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:19:28,941 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 184 transitions. [2020-10-12 16:19:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:19:28,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:28,941 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:28,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:19:28,942 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:28,942 INFO L82 PathProgramCache]: Analyzing trace with hash -753159065, now seen corresponding path program 10 times [2020-10-12 16:19:28,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:28,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283876869] [2020-10-12 16:19:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:28,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:29,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:19:29,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:29,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-12 16:19:29,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:19:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:19:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:29,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:29,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:29,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:29,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:29,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:29,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:29,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:29,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:29,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:29,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:29,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:29,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:29,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:29,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:29,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283876869] [2020-10-12 16:19:29,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:29,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:19:29,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213222083] [2020-10-12 16:19:29,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:19:29,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:29,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:19:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:19:29,252 INFO L87 Difference]: Start difference. First operand 148 states and 184 transitions. Second operand 15 states. [2020-10-12 16:19:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:29,744 INFO L93 Difference]: Finished difference Result 317 states and 399 transitions. [2020-10-12 16:19:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:19:29,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-12 16:19:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:29,748 INFO L225 Difference]: With dead ends: 317 [2020-10-12 16:19:29,748 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 16:19:29,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:19:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 16:19:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 162. [2020-10-12 16:19:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-12 16:19:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2020-10-12 16:19:29,770 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 51 [2020-10-12 16:19:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:29,770 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2020-10-12 16:19:29,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:19:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2020-10-12 16:19:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:19:29,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:29,772 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:29,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:19:29,773 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash 755731321, now seen corresponding path program 6 times [2020-10-12 16:19:29,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:29,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691091712] [2020-10-12 16:19:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:29,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:30,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:30,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:30,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:30,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:19:30,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-12 16:19:30,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:19:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:19:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:30,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:30,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:30,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:30,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:30,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:30,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:30,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:30,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:30,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:30,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:30,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:30,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:30,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:30,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:30,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:30,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:30,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:30,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691091712] [2020-10-12 16:19:30,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:30,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:19:30,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23607092] [2020-10-12 16:19:30,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:19:30,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:19:30,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:19:30,942 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand 17 states. [2020-10-12 16:19:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:32,055 INFO L93 Difference]: Finished difference Result 383 states and 484 transitions. [2020-10-12 16:19:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:19:32,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-12 16:19:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:32,058 INFO L225 Difference]: With dead ends: 383 [2020-10-12 16:19:32,058 INFO L226 Difference]: Without dead ends: 233 [2020-10-12 16:19:32,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1135, Invalid=3025, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:19:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-12 16:19:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 214. [2020-10-12 16:19:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-12 16:19:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 271 transitions. [2020-10-12 16:19:32,076 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 271 transitions. Word has length 54 [2020-10-12 16:19:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:32,077 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 271 transitions. [2020-10-12 16:19:32,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:19:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 271 transitions. [2020-10-12 16:19:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:19:32,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:32,078 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:32,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:19:32,078 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:32,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:32,079 INFO L82 PathProgramCache]: Analyzing trace with hash -224101703, now seen corresponding path program 11 times [2020-10-12 16:19:32,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:32,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395250328] [2020-10-12 16:19:32,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:32,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:32,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:32,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:32,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:19:32,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:32,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-12 16:19:32,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:32,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:19:32,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:32,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 16:19:32,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:32,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:32,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:32,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:32,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:32,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:32,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:32,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:32,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:32,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:32,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:32,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:32,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:32,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:32,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:32,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:32,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:32,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395250328] [2020-10-12 16:19:32,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:32,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:19:32,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510662139] [2020-10-12 16:19:32,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:19:32,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:19:32,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:19:32,387 INFO L87 Difference]: Start difference. First operand 214 states and 271 transitions. Second operand 16 states. [2020-10-12 16:19:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:32,874 INFO L93 Difference]: Finished difference Result 460 states and 587 transitions. [2020-10-12 16:19:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:19:32,884 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-12 16:19:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:32,886 INFO L225 Difference]: With dead ends: 460 [2020-10-12 16:19:32,886 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 16:19:32,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:19:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 16:19:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 233. [2020-10-12 16:19:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-12 16:19:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 293 transitions. [2020-10-12 16:19:32,906 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 293 transitions. Word has length 54 [2020-10-12 16:19:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:32,907 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 293 transitions. [2020-10-12 16:19:32,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:19:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 293 transitions. [2020-10-12 16:19:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:19:32,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:32,913 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:32,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:19:32,913 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:32,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1606206681, now seen corresponding path program 12 times [2020-10-12 16:19:32,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:32,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249769083] [2020-10-12 16:19:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:32,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:32,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:33,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 16:19:33,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:33,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-12 16:19:33,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:19:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:33,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:19:33,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:33,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:33,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:33,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:33,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:33,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:33,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:33,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:33,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:33,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:33,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:33,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:33,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:33,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:33,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:33,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:33,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:33,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:33,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249769083] [2020-10-12 16:19:33,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:33,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:19:33,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8135348] [2020-10-12 16:19:33,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:19:33,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:33,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:19:33,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:19:33,256 INFO L87 Difference]: Start difference. First operand 233 states and 293 transitions. Second operand 17 states. [2020-10-12 16:19:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:33,759 INFO L93 Difference]: Finished difference Result 504 states and 640 transitions. [2020-10-12 16:19:33,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:19:33,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-10-12 16:19:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:33,762 INFO L225 Difference]: With dead ends: 504 [2020-10-12 16:19:33,762 INFO L226 Difference]: Without dead ends: 283 [2020-10-12 16:19:33,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:19:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-12 16:19:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 256. [2020-10-12 16:19:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-12 16:19:33,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 321 transitions. [2020-10-12 16:19:33,781 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 321 transitions. Word has length 57 [2020-10-12 16:19:33,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:33,782 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 321 transitions. [2020-10-12 16:19:33,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:19:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 321 transitions. [2020-10-12 16:19:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:19:33,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:33,783 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:33,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:19:33,784 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:33,784 INFO L82 PathProgramCache]: Analyzing trace with hash 935693497, now seen corresponding path program 7 times [2020-10-12 16:19:33,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:33,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342442683] [2020-10-12 16:19:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:33,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:34,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:34,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:34,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:34,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:19:34,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:34,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-12 16:19:34,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:34,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:19:34,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:34,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 16:19:34,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:35,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:35,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:35,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:35,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:35,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:35,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:35,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:35,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:35,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:35,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:35,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:35,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:35,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:35,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:35,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:35,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:35,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:35,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:35,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:35,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:35,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:35,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342442683] [2020-10-12 16:19:35,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:35,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:19:35,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710742865] [2020-10-12 16:19:35,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:19:35,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:19:35,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:19:35,118 INFO L87 Difference]: Start difference. First operand 256 states and 321 transitions. Second operand 19 states. [2020-10-12 16:19:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:36,683 INFO L93 Difference]: Finished difference Result 580 states and 736 transitions. [2020-10-12 16:19:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:19:36,687 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-12 16:19:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:36,692 INFO L225 Difference]: With dead ends: 580 [2020-10-12 16:19:36,692 INFO L226 Difference]: Without dead ends: 336 [2020-10-12 16:19:36,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1519, Invalid=4031, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:19:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-12 16:19:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 255. [2020-10-12 16:19:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-12 16:19:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 321 transitions. [2020-10-12 16:19:36,720 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 321 transitions. Word has length 60 [2020-10-12 16:19:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:36,720 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 321 transitions. [2020-10-12 16:19:36,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:19:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 321 transitions. [2020-10-12 16:19:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:19:36,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:36,725 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:36,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:19:36,726 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:36,726 INFO L82 PathProgramCache]: Analyzing trace with hash -44139527, now seen corresponding path program 13 times [2020-10-12 16:19:36,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:36,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645949566] [2020-10-12 16:19:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:36,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:36,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:36,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:36,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:19:36,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:36,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-12 16:19:36,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:36,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:19:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 16:19:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:37,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:37,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:37,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:37,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:37,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:37,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:37,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:37,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:37,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:37,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:37,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:37,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:37,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:37,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:19:37,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:37,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:37,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:37,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:37,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:37,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645949566] [2020-10-12 16:19:37,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:37,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:19:37,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421796694] [2020-10-12 16:19:37,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:19:37,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:37,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:19:37,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:19:37,173 INFO L87 Difference]: Start difference. First operand 255 states and 321 transitions. Second operand 18 states. [2020-10-12 16:19:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:37,816 INFO L93 Difference]: Finished difference Result 543 states and 689 transitions. [2020-10-12 16:19:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:19:37,816 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-12 16:19:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:37,822 INFO L225 Difference]: With dead ends: 543 [2020-10-12 16:19:37,823 INFO L226 Difference]: Without dead ends: 300 [2020-10-12 16:19:37,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=366, Invalid=690, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:19:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-12 16:19:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 275. [2020-10-12 16:19:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-12 16:19:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 345 transitions. [2020-10-12 16:19:37,859 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 345 transitions. Word has length 60 [2020-10-12 16:19:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:37,859 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 345 transitions. [2020-10-12 16:19:37,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:19:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 345 transitions. [2020-10-12 16:19:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:19:37,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:37,862 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:37,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:19:37,862 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:37,863 INFO L82 PathProgramCache]: Analyzing trace with hash -472206873, now seen corresponding path program 14 times [2020-10-12 16:19:37,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:37,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683369515] [2020-10-12 16:19:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:37,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:37,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:38,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:38,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 16:19:38,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:38,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-12 16:19:38,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:38,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:19:38,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:38,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:19:38,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:38,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:38,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:38,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:38,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:38,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:38,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:38,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:38,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:38,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:38,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:38,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:19:38,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:38,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:38,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:38,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:38,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:38,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:38,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:38,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:38,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:38,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683369515] [2020-10-12 16:19:38,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:38,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:19:38,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869998896] [2020-10-12 16:19:38,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:19:38,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:38,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:19:38,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:19:38,294 INFO L87 Difference]: Start difference. First operand 275 states and 345 transitions. Second operand 19 states. [2020-10-12 16:19:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:38,895 INFO L93 Difference]: Finished difference Result 588 states and 744 transitions. [2020-10-12 16:19:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:19:38,896 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-10-12 16:19:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:38,898 INFO L225 Difference]: With dead ends: 588 [2020-10-12 16:19:38,898 INFO L226 Difference]: Without dead ends: 325 [2020-10-12 16:19:38,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:19:38,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-12 16:19:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 298. [2020-10-12 16:19:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-12 16:19:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 373 transitions. [2020-10-12 16:19:38,919 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 373 transitions. Word has length 63 [2020-10-12 16:19:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:38,920 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 373 transitions. [2020-10-12 16:19:38,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:19:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 373 transitions. [2020-10-12 16:19:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:19:38,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:38,921 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:38,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:19:38,921 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash -288776711, now seen corresponding path program 8 times [2020-10-12 16:19:38,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:38,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461023651] [2020-10-12 16:19:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:38,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:38,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:38,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:39,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:39,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:39,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:39,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:39,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:40,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:40,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:19:40,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:40,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-10-12 16:19:40,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:19:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 16:19:40,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:40,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:40,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:40,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:40,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:40,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:40,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:40,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:40,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:40,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:40,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:40,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:40,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:40,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:40,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:40,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:40,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:40,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:40,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:40,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:40,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:40,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:40,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461023651] [2020-10-12 16:19:40,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:40,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:19:40,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799242660] [2020-10-12 16:19:40,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:19:40,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:40,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:19:40,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:19:40,328 INFO L87 Difference]: Start difference. First operand 298 states and 373 transitions. Second operand 21 states. [2020-10-12 16:19:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:42,315 INFO L93 Difference]: Finished difference Result 670 states and 848 transitions. [2020-10-12 16:19:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-12 16:19:42,316 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-10-12 16:19:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:42,319 INFO L225 Difference]: With dead ends: 670 [2020-10-12 16:19:42,319 INFO L226 Difference]: Without dead ends: 384 [2020-10-12 16:19:42,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1959, Invalid=5181, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 16:19:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-12 16:19:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 297. [2020-10-12 16:19:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 16:19:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 373 transitions. [2020-10-12 16:19:42,342 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 373 transitions. Word has length 66 [2020-10-12 16:19:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:42,342 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 373 transitions. [2020-10-12 16:19:42,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:19:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 373 transitions. [2020-10-12 16:19:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:19:42,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:42,344 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:42,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:19:42,344 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1268609735, now seen corresponding path program 15 times [2020-10-12 16:19:42,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:42,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88941904] [2020-10-12 16:19:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:42,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:42,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:42,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:42,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:19:42,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:42,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-12 16:19:42,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:42,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:19:42,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:42,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 16:19:42,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:42,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:42,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:42,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:42,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:42,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:42,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:42,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:42,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:42,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:42,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:42,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:42,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:42,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:42,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:42,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:42,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:42,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:42,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:42,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:42,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88941904] [2020-10-12 16:19:42,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:42,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:19:42,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857878735] [2020-10-12 16:19:42,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:19:42,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:19:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:19:42,818 INFO L87 Difference]: Start difference. First operand 297 states and 373 transitions. Second operand 20 states. [2020-10-12 16:19:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:43,522 INFO L93 Difference]: Finished difference Result 627 states and 793 transitions. [2020-10-12 16:19:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:19:43,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2020-10-12 16:19:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:43,529 INFO L225 Difference]: With dead ends: 627 [2020-10-12 16:19:43,529 INFO L226 Difference]: Without dead ends: 342 [2020-10-12 16:19:43,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=867, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:19:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-12 16:19:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 317. [2020-10-12 16:19:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-12 16:19:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 397 transitions. [2020-10-12 16:19:43,585 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 397 transitions. Word has length 66 [2020-10-12 16:19:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:43,586 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 397 transitions. [2020-10-12 16:19:43,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:19:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 397 transitions. [2020-10-12 16:19:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 16:19:43,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:43,588 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:43,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:19:43,588 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:43,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1506928473, now seen corresponding path program 16 times [2020-10-12 16:19:43,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:43,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662462255] [2020-10-12 16:19:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:43,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:43,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:43,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:43,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 16:19:43,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:43,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-12 16:19:43,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:43,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:19:43,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:43,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:19:43,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:44,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:44,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:44,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:44,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:44,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:44,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:44,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:44,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:44,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:44,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:44,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:44,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:44,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:44,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:44,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:44,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:44,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:44,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:44,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:44,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:44,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662462255] [2020-10-12 16:19:44,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:44,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:19:44,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474246624] [2020-10-12 16:19:44,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:19:44,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:44,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:19:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:19:44,155 INFO L87 Difference]: Start difference. First operand 317 states and 397 transitions. Second operand 21 states. [2020-10-12 16:19:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:44,868 INFO L93 Difference]: Finished difference Result 672 states and 848 transitions. [2020-10-12 16:19:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:19:44,868 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2020-10-12 16:19:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:44,872 INFO L225 Difference]: With dead ends: 672 [2020-10-12 16:19:44,872 INFO L226 Difference]: Without dead ends: 367 [2020-10-12 16:19:44,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=519, Invalid=963, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:19:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-12 16:19:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 340. [2020-10-12 16:19:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-12 16:19:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 425 transitions. [2020-10-12 16:19:44,909 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 425 transitions. Word has length 69 [2020-10-12 16:19:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:44,909 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 425 transitions. [2020-10-12 16:19:44,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:19:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 425 transitions. [2020-10-12 16:19:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:19:44,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:44,911 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:44,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:19:44,911 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash -699678919, now seen corresponding path program 9 times [2020-10-12 16:19:44,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:44,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064934750] [2020-10-12 16:19:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:44,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:44,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:44,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:45,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:45,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:45,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:45,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:46,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:19:46,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:46,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1312 [2020-10-12 16:19:46,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:46,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:19:46,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:46,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 16:19:46,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:46,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:46,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:46,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:46,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:46,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:46,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:46,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:46,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:46,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:46,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:46,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:46,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:46,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:46,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:46,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:46,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:46,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:46,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:46,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064934750] [2020-10-12 16:19:46,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:46,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:19:46,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993165304] [2020-10-12 16:19:46,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:19:46,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:19:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:19:46,564 INFO L87 Difference]: Start difference. First operand 340 states and 425 transitions. Second operand 23 states. [2020-10-12 16:19:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:48,756 INFO L93 Difference]: Finished difference Result 760 states and 960 transitions. [2020-10-12 16:19:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-12 16:19:48,757 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-10-12 16:19:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:48,759 INFO L225 Difference]: With dead ends: 760 [2020-10-12 16:19:48,759 INFO L226 Difference]: Without dead ends: 432 [2020-10-12 16:19:48,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2857 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2455, Invalid=6475, Unknown=0, NotChecked=0, Total=8930 [2020-10-12 16:19:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-12 16:19:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 339. [2020-10-12 16:19:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-12 16:19:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 425 transitions. [2020-10-12 16:19:48,787 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 425 transitions. Word has length 72 [2020-10-12 16:19:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:48,788 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 425 transitions. [2020-10-12 16:19:48,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:19:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 425 transitions. [2020-10-12 16:19:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:19:48,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:48,789 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:48,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:19:48,790 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1679511943, now seen corresponding path program 17 times [2020-10-12 16:19:48,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:48,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767442417] [2020-10-12 16:19:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:48,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:19:49,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:49,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-12 16:19:49,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:19:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 16:19:49,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:49,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:49,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:49,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:49,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:49,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:49,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:49,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:49,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:49,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:49,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:49,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:49,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:49,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:49,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:49,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:49,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767442417] [2020-10-12 16:19:49,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:49,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:19:49,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146944873] [2020-10-12 16:19:49,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:19:49,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:49,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:19:49,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:19:49,497 INFO L87 Difference]: Start difference. First operand 339 states and 425 transitions. Second operand 22 states. [2020-10-12 16:19:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:50,077 INFO L93 Difference]: Finished difference Result 711 states and 897 transitions. [2020-10-12 16:19:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:19:50,077 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-12 16:19:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:50,080 INFO L225 Difference]: With dead ends: 711 [2020-10-12 16:19:50,080 INFO L226 Difference]: Without dead ends: 384 [2020-10-12 16:19:50,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=576, Invalid=1064, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:19:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-12 16:19:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 359. [2020-10-12 16:19:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-12 16:19:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 449 transitions. [2020-10-12 16:19:50,108 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 449 transitions. Word has length 72 [2020-10-12 16:19:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:50,108 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 449 transitions. [2020-10-12 16:19:50,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:19:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 449 transitions. [2020-10-12 16:19:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 16:19:50,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:50,109 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:50,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:19:50,110 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:50,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2037813401, now seen corresponding path program 18 times [2020-10-12 16:19:50,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:50,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109298269] [2020-10-12 16:19:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:50,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:50,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:50,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:50,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 16:19:50,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:50,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-12 16:19:50,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:50,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:19:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 16:19:50,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:50,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:50,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:50,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:50,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:50,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:50,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:50,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:50,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:50,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:50,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:50,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:50,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:50,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:50,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:50,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:50,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:50,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:50,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109298269] [2020-10-12 16:19:50,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:50,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:19:50,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302347447] [2020-10-12 16:19:50,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:19:50,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:50,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:19:50,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:19:50,621 INFO L87 Difference]: Start difference. First operand 359 states and 449 transitions. Second operand 23 states. [2020-10-12 16:19:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:51,422 INFO L93 Difference]: Finished difference Result 756 states and 952 transitions. [2020-10-12 16:19:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:19:51,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2020-10-12 16:19:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:51,426 INFO L225 Difference]: With dead ends: 756 [2020-10-12 16:19:51,426 INFO L226 Difference]: Without dead ends: 409 [2020-10-12 16:19:51,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=636, Invalid=1170, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:19:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-12 16:19:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 382. [2020-10-12 16:19:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-12 16:19:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 477 transitions. [2020-10-12 16:19:51,454 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 477 transitions. Word has length 75 [2020-10-12 16:19:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:51,455 INFO L479 AbstractCegarLoop]: Abstraction has 382 states and 477 transitions. [2020-10-12 16:19:51,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:19:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 477 transitions. [2020-10-12 16:19:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:19:51,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:51,456 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:51,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:19:51,457 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:51,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2071982201, now seen corresponding path program 10 times [2020-10-12 16:19:51,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:51,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773905832] [2020-10-12 16:19:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:51,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:52,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:52,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:19:52,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:52,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-12 16:19:52,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:19:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 16:19:52,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:52,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:52,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:52,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:52,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:52,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:52,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:52,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:52,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:52,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:52,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:52,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:52,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:52,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:52,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:52,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:52,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:52,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:52,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:52,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773905832] [2020-10-12 16:19:52,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:52,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:19:52,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961131824] [2020-10-12 16:19:52,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:19:52,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:19:52,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:52,775 INFO L87 Difference]: Start difference. First operand 382 states and 477 transitions. Second operand 25 states. [2020-10-12 16:19:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:55,204 INFO L93 Difference]: Finished difference Result 850 states and 1072 transitions. [2020-10-12 16:19:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-12 16:19:55,205 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2020-10-12 16:19:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:55,208 INFO L225 Difference]: With dead ends: 850 [2020-10-12 16:19:55,208 INFO L226 Difference]: Without dead ends: 480 [2020-10-12 16:19:55,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3554 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3007, Invalid=7913, Unknown=0, NotChecked=0, Total=10920 [2020-10-12 16:19:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-10-12 16:19:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 381. [2020-10-12 16:19:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-12 16:19:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 477 transitions. [2020-10-12 16:19:55,243 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 477 transitions. Word has length 78 [2020-10-12 16:19:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:55,243 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 477 transitions. [2020-10-12 16:19:55,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:19:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 477 transitions. [2020-10-12 16:19:55,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:19:55,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:55,245 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:55,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:19:55,245 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:55,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1092149177, now seen corresponding path program 19 times [2020-10-12 16:19:55,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:55,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572549727] [2020-10-12 16:19:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:55,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:55,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:55,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:19:55,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:55,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-12 16:19:55,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:19:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:55,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 16:19:55,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:55,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:55,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:55,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:55,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:55,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:55,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:55,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:55,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:55,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:55,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:55,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:55,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:55,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:55,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:55,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:55,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:55,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:55,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:55,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572549727] [2020-10-12 16:19:55,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:55,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:19:55,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418415996] [2020-10-12 16:19:55,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:19:55,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:19:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:19:55,828 INFO L87 Difference]: Start difference. First operand 381 states and 477 transitions. Second operand 24 states. [2020-10-12 16:19:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:56,607 INFO L93 Difference]: Finished difference Result 795 states and 1001 transitions. [2020-10-12 16:19:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:19:56,612 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2020-10-12 16:19:56,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:56,615 INFO L225 Difference]: With dead ends: 795 [2020-10-12 16:19:56,615 INFO L226 Difference]: Without dead ends: 426 [2020-10-12 16:19:56,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=699, Invalid=1281, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:19:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-12 16:19:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 401. [2020-10-12 16:19:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-12 16:19:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 501 transitions. [2020-10-12 16:19:56,648 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 501 transitions. Word has length 78 [2020-10-12 16:19:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:56,648 INFO L479 AbstractCegarLoop]: Abstraction has 401 states and 501 transitions. [2020-10-12 16:19:56,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:19:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 501 transitions. [2020-10-12 16:19:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 16:19:56,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:56,650 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:56,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:19:56,650 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:56,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2067314215, now seen corresponding path program 20 times [2020-10-12 16:19:56,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:56,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525040160] [2020-10-12 16:19:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:56,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:56,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:56,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:56,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 16:19:56,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:56,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-12 16:19:56,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:56,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:19:56,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:56,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:19:56,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:57,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:57,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:57,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:57,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:57,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:57,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:57,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:57,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:57,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:57,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:57,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:57,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:57,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:57,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:57,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:57,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:57,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:57,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:57,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:57,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:57,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:57,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:57,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525040160] [2020-10-12 16:19:57,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:57,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:19:57,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23998563] [2020-10-12 16:19:57,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:19:57,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:57,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:19:57,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:57,211 INFO L87 Difference]: Start difference. First operand 401 states and 501 transitions. Second operand 25 states. [2020-10-12 16:19:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:58,060 INFO L93 Difference]: Finished difference Result 840 states and 1056 transitions. [2020-10-12 16:19:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:19:58,061 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2020-10-12 16:19:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:58,063 INFO L225 Difference]: With dead ends: 840 [2020-10-12 16:19:58,063 INFO L226 Difference]: Without dead ends: 451 [2020-10-12 16:19:58,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=1397, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:19:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-12 16:19:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 424. [2020-10-12 16:19:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-10-12 16:19:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 529 transitions. [2020-10-12 16:19:58,095 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 529 transitions. Word has length 81 [2020-10-12 16:19:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:58,095 INFO L479 AbstractCegarLoop]: Abstraction has 424 states and 529 transitions. [2020-10-12 16:19:58,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:19:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 529 transitions. [2020-10-12 16:19:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:19:58,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:58,097 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:58,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:19:58,097 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:58,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1264963143, now seen corresponding path program 11 times [2020-10-12 16:19:58,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:58,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023881068] [2020-10-12 16:19:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:58,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:58,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:58,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:58,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:58,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:58,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:58,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:58,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 16:19:58,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:19:58,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-12 16:19:58,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:19:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:19:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 16:19:58,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:59,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:59,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:59,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:59,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:19:59,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:59,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:59,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:59,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:59,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:59,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:19:59,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:59,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:19:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:59,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:59,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:59,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:59,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:59,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:59,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:59,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:59,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:59,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:59,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023881068] [2020-10-12 16:19:59,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:59,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:19:59,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589664305] [2020-10-12 16:19:59,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:19:59,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:19:59,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:19:59,356 INFO L87 Difference]: Start difference. First operand 424 states and 529 transitions. Second operand 27 states. [2020-10-12 16:20:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:01,090 INFO L93 Difference]: Finished difference Result 933 states and 1175 transitions. [2020-10-12 16:20:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:20:01,090 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2020-10-12 16:20:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:01,093 INFO L225 Difference]: With dead ends: 933 [2020-10-12 16:20:01,093 INFO L226 Difference]: Without dead ends: 519 [2020-10-12 16:20:01,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1563, Invalid=3693, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:20:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-10-12 16:20:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 281. [2020-10-12 16:20:01,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-12 16:20:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 351 transitions. [2020-10-12 16:20:01,122 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 351 transitions. Word has length 84 [2020-10-12 16:20:01,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:01,122 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 351 transitions. [2020-10-12 16:20:01,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:20:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 351 transitions. [2020-10-12 16:20:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:20:01,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:01,124 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:01,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:20:01,124 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2050171129, now seen corresponding path program 21 times [2020-10-12 16:20:01,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:01,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178034282] [2020-10-12 16:20:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:01,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:01,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:01,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:01,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 16:20:01,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:01,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-12 16:20:01,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:20:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 16:20:01,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:01,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:01,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:01,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:01,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:01,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:01,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:01,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:01,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:01,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:01,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:01,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:01,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:01,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:01,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:01,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:01,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:01,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178034282] [2020-10-12 16:20:01,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:01,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:20:01,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666921102] [2020-10-12 16:20:01,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:20:01,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:01,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:20:01,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:20:01,743 INFO L87 Difference]: Start difference. First operand 281 states and 351 transitions. Second operand 26 states. [2020-10-12 16:20:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:02,717 INFO L93 Difference]: Finished difference Result 578 states and 726 transitions. [2020-10-12 16:20:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:20:02,717 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2020-10-12 16:20:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:02,719 INFO L225 Difference]: With dead ends: 578 [2020-10-12 16:20:02,719 INFO L226 Difference]: Without dead ends: 309 [2020-10-12 16:20:02,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:20:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-12 16:20:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 292. [2020-10-12 16:20:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-12 16:20:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 364 transitions. [2020-10-12 16:20:02,748 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 364 transitions. Word has length 84 [2020-10-12 16:20:02,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:02,748 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 364 transitions. [2020-10-12 16:20:02,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:20:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 364 transitions. [2020-10-12 16:20:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 16:20:02,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:02,750 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:02,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:20:02,750 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:02,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1853362969, now seen corresponding path program 22 times [2020-10-12 16:20:02,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:02,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278730795] [2020-10-12 16:20:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:02,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:02,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:02,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:02,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 16:20:02,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:02,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-12 16:20:02,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:02,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:20:02,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:02,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 16:20:02,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:03,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:03,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:03,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:03,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:03,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:03,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:03,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:03,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:03,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:03,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:03,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:03,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:03,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:03,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:03,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:03,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:03,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:03,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:03,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:03,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:03,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278730795] [2020-10-12 16:20:03,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:03,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:20:03,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716799357] [2020-10-12 16:20:03,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:20:03,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:20:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:20:03,393 INFO L87 Difference]: Start difference. First operand 292 states and 364 transitions. Second operand 27 states. [2020-10-12 16:20:04,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:04,460 INFO L93 Difference]: Finished difference Result 605 states and 759 transitions. [2020-10-12 16:20:04,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:20:04,460 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 87 [2020-10-12 16:20:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:04,462 INFO L225 Difference]: With dead ends: 605 [2020-10-12 16:20:04,462 INFO L226 Difference]: Without dead ends: 325 [2020-10-12 16:20:04,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=906, Invalid=1644, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:20:04,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-12 16:20:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 306. [2020-10-12 16:20:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-12 16:20:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 381 transitions. [2020-10-12 16:20:04,493 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 381 transitions. Word has length 87 [2020-10-12 16:20:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:04,493 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 381 transitions. [2020-10-12 16:20:04,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:20:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 381 transitions. [2020-10-12 16:20:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:20:04,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:04,495 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:04,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:20:04,495 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:04,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:04,495 INFO L82 PathProgramCache]: Analyzing trace with hash -523336967, now seen corresponding path program 12 times [2020-10-12 16:20:04,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:04,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587829452] [2020-10-12 16:20:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:04,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:04,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:04,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:04,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:04,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:04,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:04,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:05,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:05,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:05,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 16:20:05,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:20:05,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 812 [2020-10-12 16:20:05,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:05,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:20:05,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:05,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 16:20:05,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:05,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:05,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:05,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:05,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:05,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:05,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:05,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:05,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:05,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:05,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:05,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:05,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:05,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:05,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:05,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:05,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:05,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:05,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:05,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:05,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:05,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587829452] [2020-10-12 16:20:05,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:05,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:20:05,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932396587] [2020-10-12 16:20:05,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:20:05,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:20:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=504, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:20:05,825 INFO L87 Difference]: Start difference. First operand 306 states and 381 transitions. Second operand 29 states. [2020-10-12 16:20:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:09,097 INFO L93 Difference]: Finished difference Result 707 states and 892 transitions. [2020-10-12 16:20:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-12 16:20:09,098 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 90 [2020-10-12 16:20:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:09,100 INFO L225 Difference]: With dead ends: 707 [2020-10-12 16:20:09,101 INFO L226 Difference]: Without dead ends: 413 [2020-10-12 16:20:09,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5176 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4279, Invalid=11221, Unknown=0, NotChecked=0, Total=15500 [2020-10-12 16:20:09,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-12 16:20:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 394. [2020-10-12 16:20:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-12 16:20:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 499 transitions. [2020-10-12 16:20:09,136 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 499 transitions. Word has length 90 [2020-10-12 16:20:09,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:09,137 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 499 transitions. [2020-10-12 16:20:09,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:20:09,137 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 499 transitions. [2020-10-12 16:20:09,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:20:09,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:09,139 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:09,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:20:09,139 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:09,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1503169991, now seen corresponding path program 23 times [2020-10-12 16:20:09,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:09,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661313483] [2020-10-12 16:20:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:09,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:09,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:09,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:09,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 16:20:09,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:09,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-12 16:20:09,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:09,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:20:09,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:09,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 16:20:09,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:20:09,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:09,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:09,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:09,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:09,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:09,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:20:09,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:09,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:09,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:09,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:09,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:09,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:09,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:09,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:09,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:09,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661313483] [2020-10-12 16:20:09,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:09,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:20:09,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357903160] [2020-10-12 16:20:09,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:20:09,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:09,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:20:09,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:20:09,966 INFO L87 Difference]: Start difference. First operand 394 states and 499 transitions. Second operand 28 states. [2020-10-12 16:20:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:11,096 INFO L93 Difference]: Finished difference Result 820 states and 1043 transitions. [2020-10-12 16:20:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:20:11,096 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 90 [2020-10-12 16:20:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:11,098 INFO L225 Difference]: With dead ends: 820 [2020-10-12 16:20:11,098 INFO L226 Difference]: Without dead ends: 438 [2020-10-12 16:20:11,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=981, Invalid=1775, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:20:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-12 16:20:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 413. [2020-10-12 16:20:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-12 16:20:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 521 transitions. [2020-10-12 16:20:11,135 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 521 transitions. Word has length 90 [2020-10-12 16:20:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:11,136 INFO L479 AbstractCegarLoop]: Abstraction has 413 states and 521 transitions. [2020-10-12 16:20:11,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:20:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 521 transitions. [2020-10-12 16:20:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 16:20:11,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:11,137 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:11,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:20:11,138 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:11,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1379724377, now seen corresponding path program 24 times [2020-10-12 16:20:11,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:11,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299414181] [2020-10-12 16:20:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:11,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:11,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:11,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:11,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 16:20:11,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:11,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-12 16:20:11,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:11,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:20:11,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:11,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 16:20:11,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:11,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:11,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:11,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:11,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:11,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:11,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:11,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:11,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:11,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:11,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:11,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:11,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:11,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:11,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:11,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:11,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:11,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:11,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:11,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:11,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:11,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:11,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:11,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299414181] [2020-10-12 16:20:11,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:11,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:20:11,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192831898] [2020-10-12 16:20:11,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:20:11,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:11,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:20:11,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:20:11,949 INFO L87 Difference]: Start difference. First operand 413 states and 521 transitions. Second operand 29 states. [2020-10-12 16:20:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:13,134 INFO L93 Difference]: Finished difference Result 864 states and 1096 transitions. [2020-10-12 16:20:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:20:13,135 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 93 [2020-10-12 16:20:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:13,137 INFO L225 Difference]: With dead ends: 864 [2020-10-12 16:20:13,137 INFO L226 Difference]: Without dead ends: 463 [2020-10-12 16:20:13,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1059, Invalid=1911, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:20:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-10-12 16:20:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 436. [2020-10-12 16:20:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-12 16:20:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 549 transitions. [2020-10-12 16:20:13,174 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 549 transitions. Word has length 93 [2020-10-12 16:20:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:13,175 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 549 transitions. [2020-10-12 16:20:13,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:20:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 549 transitions. [2020-10-12 16:20:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 16:20:13,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:13,176 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:13,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:20:13,176 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 676389945, now seen corresponding path program 13 times [2020-10-12 16:20:13,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:13,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329745388] [2020-10-12 16:20:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:13,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:13,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:13,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:13,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:13,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:13,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:14,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:14,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 16:20:14,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:20:14,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-12 16:20:14,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:14,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:20:14,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:14,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 16:20:14,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:14,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:14,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:14,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:14,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:14,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:14,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:14,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:14,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:14,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:14,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:14,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:14,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:14,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:14,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:14,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:14,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:14,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:14,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:14,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:14,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:14,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:14,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:14,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329745388] [2020-10-12 16:20:14,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:14,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:20:14,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650904280] [2020-10-12 16:20:14,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:20:14,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:14,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:20:14,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=571, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:20:14,727 INFO L87 Difference]: Start difference. First operand 436 states and 549 transitions. Second operand 31 states. [2020-10-12 16:20:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:18,905 INFO L93 Difference]: Finished difference Result 976 states and 1240 transitions. [2020-10-12 16:20:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-10-12 16:20:18,906 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 96 [2020-10-12 16:20:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:18,909 INFO L225 Difference]: With dead ends: 976 [2020-10-12 16:20:18,909 INFO L226 Difference]: Without dead ends: 552 [2020-10-12 16:20:18,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6101 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4999, Invalid=13091, Unknown=0, NotChecked=0, Total=18090 [2020-10-12 16:20:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-10-12 16:20:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 435. [2020-10-12 16:20:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-12 16:20:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 549 transitions. [2020-10-12 16:20:18,943 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 549 transitions. Word has length 96 [2020-10-12 16:20:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:18,943 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 549 transitions. [2020-10-12 16:20:18,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:20:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 549 transitions. [2020-10-12 16:20:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 16:20:18,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:18,945 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:18,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:20:18,945 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash -303443079, now seen corresponding path program 25 times [2020-10-12 16:20:18,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:18,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802350602] [2020-10-12 16:20:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:18,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:18,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:19,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:19,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 16:20:19,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:19,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-12 16:20:19,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:20:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 16:20:19,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:19,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:19,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:19,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:19,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:19,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:19,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:19,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:19,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:19,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:19,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:19,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:19,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:19,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:19,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:19,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:19,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:19,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802350602] [2020-10-12 16:20:19,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:19,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:20:19,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977550318] [2020-10-12 16:20:19,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:20:19,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:19,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:20:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:20:19,731 INFO L87 Difference]: Start difference. First operand 435 states and 549 transitions. Second operand 30 states. [2020-10-12 16:20:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:20,767 INFO L93 Difference]: Finished difference Result 903 states and 1145 transitions. [2020-10-12 16:20:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:20:20,767 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 96 [2020-10-12 16:20:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:20,769 INFO L225 Difference]: With dead ends: 903 [2020-10-12 16:20:20,770 INFO L226 Difference]: Without dead ends: 480 [2020-10-12 16:20:20,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1140, Invalid=2052, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:20:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-10-12 16:20:20,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 455. [2020-10-12 16:20:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-12 16:20:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 573 transitions. [2020-10-12 16:20:20,810 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 573 transitions. Word has length 96 [2020-10-12 16:20:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:20,810 INFO L479 AbstractCegarLoop]: Abstraction has 455 states and 573 transitions. [2020-10-12 16:20:20,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:20:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 573 transitions. [2020-10-12 16:20:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 16:20:20,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:20,812 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:20,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:20:20,812 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:20,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1261840999, now seen corresponding path program 26 times [2020-10-12 16:20:20,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:20,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384140691] [2020-10-12 16:20:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:20,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:20,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:21,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:21,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-12 16:20:21,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:21,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-12 16:20:21,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:21,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:20:21,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:21,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 16:20:21,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:21,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:21,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:21,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:21,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:21,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:21,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:21,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:21,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:21,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:21,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:21,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:21,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:21,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:21,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:21,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:21,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:21,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:21,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:21,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:21,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384140691] [2020-10-12 16:20:21,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:21,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:20:21,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62103396] [2020-10-12 16:20:21,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:20:21,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:20:21,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:20:21,680 INFO L87 Difference]: Start difference. First operand 455 states and 573 transitions. Second operand 31 states. [2020-10-12 16:20:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:23,010 INFO L93 Difference]: Finished difference Result 948 states and 1200 transitions. [2020-10-12 16:20:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:20:23,013 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 99 [2020-10-12 16:20:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:23,015 INFO L225 Difference]: With dead ends: 948 [2020-10-12 16:20:23,015 INFO L226 Difference]: Without dead ends: 505 [2020-10-12 16:20:23,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1224, Invalid=2198, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:20:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-10-12 16:20:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 478. [2020-10-12 16:20:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-10-12 16:20:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 601 transitions. [2020-10-12 16:20:23,058 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 601 transitions. Word has length 99 [2020-10-12 16:20:23,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:23,058 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 601 transitions. [2020-10-12 16:20:23,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:20:23,059 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 601 transitions. [2020-10-12 16:20:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 16:20:23,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:23,060 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:23,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:20:23,060 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1135258247, now seen corresponding path program 14 times [2020-10-12 16:20:23,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:23,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960814298] [2020-10-12 16:20:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:23,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:23,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:23,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:23,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:23,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:23,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:23,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:24,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:24,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:24,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 16:20:24,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:20:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-12 16:20:24,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:20:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 16:20:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:24,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:25,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:25,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:25,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:25,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:25,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:25,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:25,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:25,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:25,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:25,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:25,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:25,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:25,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:25,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:25,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960814298] [2020-10-12 16:20:25,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:25,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:20:25,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951790524] [2020-10-12 16:20:25,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:20:25,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:25,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:20:25,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=642, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:20:25,028 INFO L87 Difference]: Start difference. First operand 478 states and 601 transitions. Second operand 33 states. [2020-10-12 16:20:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:29,777 INFO L93 Difference]: Finished difference Result 1066 states and 1352 transitions. [2020-10-12 16:20:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-10-12 16:20:29,778 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 102 [2020-10-12 16:20:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:29,780 INFO L225 Difference]: With dead ends: 1066 [2020-10-12 16:20:29,781 INFO L226 Difference]: Without dead ends: 600 [2020-10-12 16:20:29,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7102 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5775, Invalid=15105, Unknown=0, NotChecked=0, Total=20880 [2020-10-12 16:20:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-10-12 16:20:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 477. [2020-10-12 16:20:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-12 16:20:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 601 transitions. [2020-10-12 16:20:29,826 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 601 transitions. Word has length 102 [2020-10-12 16:20:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:29,826 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 601 transitions. [2020-10-12 16:20:29,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:20:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 601 transitions. [2020-10-12 16:20:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 16:20:29,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:29,828 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:29,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:20:29,828 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2115091271, now seen corresponding path program 27 times [2020-10-12 16:20:29,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:29,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037459135] [2020-10-12 16:20:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 16:20:30,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:30,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-12 16:20:30,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:20:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-12 16:20:30,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:30,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:30,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:30,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:30,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:30,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:30,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:30,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037459135] [2020-10-12 16:20:30,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:30,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:20:30,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16622631] [2020-10-12 16:20:30,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:20:30,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:30,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:20:30,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:20:30,713 INFO L87 Difference]: Start difference. First operand 477 states and 601 transitions. Second operand 32 states. [2020-10-12 16:20:31,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:31,925 INFO L93 Difference]: Finished difference Result 987 states and 1249 transitions. [2020-10-12 16:20:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:20:31,926 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 102 [2020-10-12 16:20:31,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:31,928 INFO L225 Difference]: With dead ends: 987 [2020-10-12 16:20:31,928 INFO L226 Difference]: Without dead ends: 522 [2020-10-12 16:20:31,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1311, Invalid=2349, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:20:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-10-12 16:20:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 497. [2020-10-12 16:20:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-12 16:20:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 625 transitions. [2020-10-12 16:20:31,960 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 625 transitions. Word has length 102 [2020-10-12 16:20:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:31,961 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 625 transitions. [2020-10-12 16:20:31,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:20:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 625 transitions. [2020-10-12 16:20:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-12 16:20:31,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:31,962 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:31,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:20:31,963 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1009594663, now seen corresponding path program 28 times [2020-10-12 16:20:31,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:31,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986991523] [2020-10-12 16:20:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:32,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:32,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:32,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 16:20:32,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:32,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-12 16:20:32,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:32,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:20:32,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:32,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 16:20:32,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:32,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:32,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:32,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:32,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:32,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:32,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:32,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:32,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:32,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:32,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:32,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:32,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:32,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:32,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:32,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:32,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:32,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:32,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:32,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:32,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:32,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:32,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986991523] [2020-10-12 16:20:32,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:32,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:20:32,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498739275] [2020-10-12 16:20:32,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:20:32,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:20:32,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:20:32,962 INFO L87 Difference]: Start difference. First operand 497 states and 625 transitions. Second operand 33 states. [2020-10-12 16:20:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:34,479 INFO L93 Difference]: Finished difference Result 1032 states and 1304 transitions. [2020-10-12 16:20:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:20:34,479 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 105 [2020-10-12 16:20:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:34,482 INFO L225 Difference]: With dead ends: 1032 [2020-10-12 16:20:34,482 INFO L226 Difference]: Without dead ends: 547 [2020-10-12 16:20:34,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1401, Invalid=2505, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:20:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-12 16:20:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 520. [2020-10-12 16:20:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-10-12 16:20:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 653 transitions. [2020-10-12 16:20:34,531 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 653 transitions. Word has length 105 [2020-10-12 16:20:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:34,532 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 653 transitions. [2020-10-12 16:20:34,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:20:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 653 transitions. [2020-10-12 16:20:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 16:20:34,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:34,533 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:34,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:20:34,534 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:34,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:34,534 INFO L82 PathProgramCache]: Analyzing trace with hash 386913977, now seen corresponding path program 15 times [2020-10-12 16:20:34,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:34,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284626410] [2020-10-12 16:20:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:34,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:34,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:34,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:34,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:34,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:34,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:35,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:35,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:35,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 16:20:35,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:20:35,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-12 16:20:35,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:20:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-12 16:20:35,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:36,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:36,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:36,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:36,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:36,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:36,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:36,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:36,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:36,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:36,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:36,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:36,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:36,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:36,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:36,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:36,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:36,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:36,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284626410] [2020-10-12 16:20:36,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:36,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:20:36,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235665002] [2020-10-12 16:20:36,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:20:36,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:20:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=717, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:20:36,330 INFO L87 Difference]: Start difference. First operand 520 states and 653 transitions. Second operand 35 states. [2020-10-12 16:20:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:41,769 INFO L93 Difference]: Finished difference Result 1156 states and 1464 transitions. [2020-10-12 16:20:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-10-12 16:20:41,770 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 108 [2020-10-12 16:20:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:41,773 INFO L225 Difference]: With dead ends: 1156 [2020-10-12 16:20:41,773 INFO L226 Difference]: Without dead ends: 648 [2020-10-12 16:20:41,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8179 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6607, Invalid=17263, Unknown=0, NotChecked=0, Total=23870 [2020-10-12 16:20:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-10-12 16:20:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 519. [2020-10-12 16:20:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-10-12 16:20:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 653 transitions. [2020-10-12 16:20:41,812 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 653 transitions. Word has length 108 [2020-10-12 16:20:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:41,812 INFO L479 AbstractCegarLoop]: Abstraction has 519 states and 653 transitions. [2020-10-12 16:20:41,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:20:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 653 transitions. [2020-10-12 16:20:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 16:20:41,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:41,813 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:41,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:20:41,813 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:41,814 INFO L82 PathProgramCache]: Analyzing trace with hash -592919047, now seen corresponding path program 29 times [2020-10-12 16:20:41,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:41,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501414881] [2020-10-12 16:20:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:41,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:42,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:42,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 16:20:42,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:42,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-12 16:20:42,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:20:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-12 16:20:42,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:42,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:42,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:42,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:42,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:42,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:42,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:42,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:42,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:42,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:42,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:42,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:42,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:42,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:42,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:42,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:42,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:42,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:42,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:42,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501414881] [2020-10-12 16:20:42,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:42,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:20:42,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636757806] [2020-10-12 16:20:42,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:20:42,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:42,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:20:42,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:20:42,872 INFO L87 Difference]: Start difference. First operand 519 states and 653 transitions. Second operand 34 states. [2020-10-12 16:20:44,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:44,479 INFO L93 Difference]: Finished difference Result 1071 states and 1353 transitions. [2020-10-12 16:20:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:20:44,480 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 108 [2020-10-12 16:20:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:44,482 INFO L225 Difference]: With dead ends: 1071 [2020-10-12 16:20:44,482 INFO L226 Difference]: Without dead ends: 564 [2020-10-12 16:20:44,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1494, Invalid=2666, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:20:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-12 16:20:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 539. [2020-10-12 16:20:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-10-12 16:20:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 677 transitions. [2020-10-12 16:20:44,532 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 677 transitions. Word has length 108 [2020-10-12 16:20:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:44,533 INFO L479 AbstractCegarLoop]: Abstraction has 539 states and 677 transitions. [2020-10-12 16:20:44,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:20:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 677 transitions. [2020-10-12 16:20:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-12 16:20:44,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:44,534 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:44,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:20:44,535 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:44,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:44,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1777608679, now seen corresponding path program 30 times [2020-10-12 16:20:44,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:44,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111911405] [2020-10-12 16:20:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:44,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:44,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:44,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:44,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 16:20:44,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:44,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-12 16:20:44,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:44,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:20:44,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:44,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-12 16:20:44,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:45,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:45,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:45,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:45,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:45,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:45,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:45,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:45,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:45,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:45,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:45,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:45,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:45,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:45,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:45,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:45,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111911405] [2020-10-12 16:20:45,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:45,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:20:45,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786605603] [2020-10-12 16:20:45,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:20:45,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:45,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:20:45,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:20:45,721 INFO L87 Difference]: Start difference. First operand 539 states and 677 transitions. Second operand 35 states. [2020-10-12 16:20:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:47,407 INFO L93 Difference]: Finished difference Result 1116 states and 1408 transitions. [2020-10-12 16:20:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:20:47,407 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 111 [2020-10-12 16:20:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:47,409 INFO L225 Difference]: With dead ends: 1116 [2020-10-12 16:20:47,409 INFO L226 Difference]: Without dead ends: 589 [2020-10-12 16:20:47,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1590, Invalid=2832, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:20:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-12 16:20:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 562. [2020-10-12 16:20:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-10-12 16:20:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 705 transitions. [2020-10-12 16:20:47,450 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 705 transitions. Word has length 111 [2020-10-12 16:20:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:47,451 INFO L479 AbstractCegarLoop]: Abstraction has 562 states and 705 transitions. [2020-10-12 16:20:47,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:20:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 705 transitions. [2020-10-12 16:20:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 16:20:47,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:47,452 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:47,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:20:47,452 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1001678841, now seen corresponding path program 16 times [2020-10-12 16:20:47,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:47,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253705029] [2020-10-12 16:20:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:47,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:47,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:47,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:47,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:48,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 16:20:48,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:20:48,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1416 [2020-10-12 16:20:48,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:20:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-12 16:20:48,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:49,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:49,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:49,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:49,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:49,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:49,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:49,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:49,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:49,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:49,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:49,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:49,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:49,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:49,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:49,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:49,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:49,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:49,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:49,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:49,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:49,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:49,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:49,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253705029] [2020-10-12 16:20:49,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:49,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:20:49,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500662935] [2020-10-12 16:20:49,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:20:49,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:20:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=796, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:20:49,734 INFO L87 Difference]: Start difference. First operand 562 states and 705 transitions. Second operand 37 states. [2020-10-12 16:20:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:53,225 INFO L93 Difference]: Finished difference Result 1239 states and 1567 transitions. [2020-10-12 16:20:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 16:20:53,226 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 114 [2020-10-12 16:20:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:53,228 INFO L225 Difference]: With dead ends: 1239 [2020-10-12 16:20:53,228 INFO L226 Difference]: Without dead ends: 687 [2020-10-12 16:20:53,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2228 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3223, Invalid=7283, Unknown=0, NotChecked=0, Total=10506 [2020-10-12 16:20:53,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-10-12 16:20:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 401. [2020-10-12 16:20:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-12 16:20:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 501 transitions. [2020-10-12 16:20:53,281 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 501 transitions. Word has length 114 [2020-10-12 16:20:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:53,282 INFO L479 AbstractCegarLoop]: Abstraction has 401 states and 501 transitions. [2020-10-12 16:20:53,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:20:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 501 transitions. [2020-10-12 16:20:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 16:20:53,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:53,283 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:53,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:20:53,284 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash 21845817, now seen corresponding path program 31 times [2020-10-12 16:20:53,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:53,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916432485] [2020-10-12 16:20:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:53,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:53,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:53,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:53,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 16:20:53,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:53,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-12 16:20:53,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:20:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 16:20:53,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:20:54,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:54,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:54,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:54,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:54,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:54,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:54,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:54,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:54,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:54,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:54,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:54,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:54,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:54,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:54,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:54,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:54,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:54,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916432485] [2020-10-12 16:20:54,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:54,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:20:54,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817252768] [2020-10-12 16:20:54,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:20:54,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:54,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:20:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:20:54,508 INFO L87 Difference]: Start difference. First operand 401 states and 501 transitions. Second operand 36 states. [2020-10-12 16:20:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:56,121 INFO L93 Difference]: Finished difference Result 818 states and 1026 transitions. [2020-10-12 16:20:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:20:56,122 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 114 [2020-10-12 16:20:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:56,124 INFO L225 Difference]: With dead ends: 818 [2020-10-12 16:20:56,124 INFO L226 Difference]: Without dead ends: 429 [2020-10-12 16:20:56,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1689, Invalid=3003, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:20:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-12 16:20:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 412. [2020-10-12 16:20:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-12 16:20:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 514 transitions. [2020-10-12 16:20:56,157 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 514 transitions. Word has length 114 [2020-10-12 16:20:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:56,157 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 514 transitions. [2020-10-12 16:20:56,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:20:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 514 transitions. [2020-10-12 16:20:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-12 16:20:56,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:56,159 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:56,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:20:56,159 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:56,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:56,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1797845337, now seen corresponding path program 32 times [2020-10-12 16:20:56,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:56,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335314251] [2020-10-12 16:20:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:56,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:56,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:56,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:56,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-12 16:20:56,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:56,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-12 16:20:56,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:56,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:20:56,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:20:56,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-12 16:20:56,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:57,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:57,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:57,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:57,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:57,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:57,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:57,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:57,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:57,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:57,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:20:57,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:57,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:20:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:57,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:57,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:57,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:57,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:57,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:57,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:57,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:57,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:57,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:57,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:57,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335314251] [2020-10-12 16:20:57,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:57,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:20:57,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244802483] [2020-10-12 16:20:57,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:20:57,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:57,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:20:57,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:20:57,386 INFO L87 Difference]: Start difference. First operand 412 states and 514 transitions. Second operand 37 states. [2020-10-12 16:20:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:59,264 INFO L93 Difference]: Finished difference Result 845 states and 1059 transitions. [2020-10-12 16:20:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:20:59,265 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 117 [2020-10-12 16:20:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:59,268 INFO L225 Difference]: With dead ends: 845 [2020-10-12 16:20:59,268 INFO L226 Difference]: Without dead ends: 445 [2020-10-12 16:20:59,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1791, Invalid=3179, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:20:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-12 16:20:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 426. [2020-10-12 16:20:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-12 16:20:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 531 transitions. [2020-10-12 16:20:59,307 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 531 transitions. Word has length 117 [2020-10-12 16:20:59,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:59,308 INFO L479 AbstractCegarLoop]: Abstraction has 426 states and 531 transitions. [2020-10-12 16:20:59,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:20:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 531 transitions. [2020-10-12 16:20:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 16:20:59,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:59,309 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:59,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:20:59,310 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:59,310 INFO L82 PathProgramCache]: Analyzing trace with hash -159971015, now seen corresponding path program 17 times [2020-10-12 16:20:59,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:59,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391631406] [2020-10-12 16:20:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:59,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:00,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:00,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 16:21:00,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:21:00,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1429 [2020-10-12 16:21:00,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:00,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:21:00,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:00,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-12 16:21:00,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:01,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:01,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:01,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:01,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:01,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:01,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:01,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:01,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:01,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:01,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:01,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:01,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:01,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:01,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:01,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:01,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:01,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:01,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:01,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:01,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:01,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:01,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:01,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391631406] [2020-10-12 16:21:01,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:01,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:21:01,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943532143] [2020-10-12 16:21:01,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:21:01,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:01,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:21:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=879, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:21:01,728 INFO L87 Difference]: Start difference. First operand 426 states and 531 transitions. Second operand 39 states. [2020-10-12 16:21:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:05,726 INFO L93 Difference]: Finished difference Result 972 states and 1225 transitions. [2020-10-12 16:21:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 16:21:05,727 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 120 [2020-10-12 16:21:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:05,729 INFO L225 Difference]: With dead ends: 972 [2020-10-12 16:21:05,729 INFO L226 Difference]: Without dead ends: 557 [2020-10-12 16:21:05,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3627, Invalid=8145, Unknown=0, NotChecked=0, Total=11772 [2020-10-12 16:21:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2020-10-12 16:21:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 425. [2020-10-12 16:21:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-12 16:21:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 531 transitions. [2020-10-12 16:21:05,771 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 531 transitions. Word has length 120 [2020-10-12 16:21:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:05,771 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 531 transitions. [2020-10-12 16:21:05,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:21:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 531 transitions. [2020-10-12 16:21:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 16:21:05,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:05,772 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:05,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:21:05,773 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1139804039, now seen corresponding path program 33 times [2020-10-12 16:21:05,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:05,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504689364] [2020-10-12 16:21:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:05,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:05,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:06,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:06,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 16:21:06,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:06,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-12 16:21:06,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:21:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 16:21:06,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:07,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:07,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:07,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:07,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:07,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:07,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:07,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:07,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:07,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:07,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:07,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:07,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:07,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:07,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:07,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:07,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:07,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:07,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:07,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:07,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:07,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:07,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:07,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504689364] [2020-10-12 16:21:07,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:07,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:21:07,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943691649] [2020-10-12 16:21:07,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:21:07,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:21:07,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:21:07,156 INFO L87 Difference]: Start difference. First operand 425 states and 531 transitions. Second operand 38 states. [2020-10-12 16:21:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:09,154 INFO L93 Difference]: Finished difference Result 866 states and 1086 transitions. [2020-10-12 16:21:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:21:09,154 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 120 [2020-10-12 16:21:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:09,156 INFO L225 Difference]: With dead ends: 866 [2020-10-12 16:21:09,156 INFO L226 Difference]: Without dead ends: 453 [2020-10-12 16:21:09,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1896, Invalid=3360, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:21:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-12 16:21:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 436. [2020-10-12 16:21:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-12 16:21:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 544 transitions. [2020-10-12 16:21:09,194 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 544 transitions. Word has length 120 [2020-10-12 16:21:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:09,194 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 544 transitions. [2020-10-12 16:21:09,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:21:09,194 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 544 transitions. [2020-10-12 16:21:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-12 16:21:09,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:09,196 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:09,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:21:09,196 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:09,196 INFO L82 PathProgramCache]: Analyzing trace with hash 337765735, now seen corresponding path program 34 times [2020-10-12 16:21:09,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:09,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015658986] [2020-10-12 16:21:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:09,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:09,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:09,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:09,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-12 16:21:09,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:09,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-12 16:21:09,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:21:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-12 16:21:09,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:10,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:10,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:10,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:10,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:10,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:10,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:10,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:10,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:10,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:10,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:10,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:10,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:10,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:10,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:10,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:10,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:10,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:10,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:10,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:10,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:10,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:10,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015658986] [2020-10-12 16:21:10,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:10,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:21:10,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086083469] [2020-10-12 16:21:10,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:21:10,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:10,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:21:10,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:21:10,637 INFO L87 Difference]: Start difference. First operand 436 states and 544 transitions. Second operand 39 states. [2020-10-12 16:21:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:12,482 INFO L93 Difference]: Finished difference Result 893 states and 1119 transitions. [2020-10-12 16:21:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:21:12,482 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 123 [2020-10-12 16:21:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:12,484 INFO L225 Difference]: With dead ends: 893 [2020-10-12 16:21:12,484 INFO L226 Difference]: Without dead ends: 469 [2020-10-12 16:21:12,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2004, Invalid=3546, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:21:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-12 16:21:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 450. [2020-10-12 16:21:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-12 16:21:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 561 transitions. [2020-10-12 16:21:12,534 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 561 transitions. Word has length 123 [2020-10-12 16:21:12,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:12,535 INFO L479 AbstractCegarLoop]: Abstraction has 450 states and 561 transitions. [2020-10-12 16:21:12,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:21:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 561 transitions. [2020-10-12 16:21:12,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 16:21:12,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:12,536 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:12,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:21:12,537 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash 478919289, now seen corresponding path program 18 times [2020-10-12 16:21:12,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:12,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865616514] [2020-10-12 16:21:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:12,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:12,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:12,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:12,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:12,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:13,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:13,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:14,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:14,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 16:21:14,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:21:14,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1605 [2020-10-12 16:21:14,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:14,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:21:14,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:14,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 16:21:14,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:15,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:15,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:15,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:15,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:15,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:15,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:15,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:15,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:15,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:15,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:15,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:15,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:15,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:15,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:15,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:15,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865616514] [2020-10-12 16:21:15,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:15,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:21:15,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43111508] [2020-10-12 16:21:15,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:21:15,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:15,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:21:15,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=966, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:21:15,270 INFO L87 Difference]: Start difference. First operand 450 states and 561 transitions. Second operand 41 states. [2020-10-12 16:21:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:19,375 INFO L93 Difference]: Finished difference Result 1026 states and 1293 transitions. [2020-10-12 16:21:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-12 16:21:19,376 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 126 [2020-10-12 16:21:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:19,378 INFO L225 Difference]: With dead ends: 1026 [2020-10-12 16:21:19,378 INFO L226 Difference]: Without dead ends: 587 [2020-10-12 16:21:19,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4055, Invalid=9055, Unknown=0, NotChecked=0, Total=13110 [2020-10-12 16:21:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-12 16:21:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 449. [2020-10-12 16:21:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-12 16:21:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 561 transitions. [2020-10-12 16:21:19,426 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 561 transitions. Word has length 126 [2020-10-12 16:21:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:19,427 INFO L479 AbstractCegarLoop]: Abstraction has 449 states and 561 transitions. [2020-10-12 16:21:19,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:21:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 561 transitions. [2020-10-12 16:21:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 16:21:19,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:19,428 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:19,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:21:19,429 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash -500913735, now seen corresponding path program 35 times [2020-10-12 16:21:19,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:19,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612398000] [2020-10-12 16:21:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:19,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:19,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:19,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:19,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 16:21:19,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:19,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-12 16:21:19,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:21:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-12 16:21:19,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:20,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:20,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:20,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:20,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:20,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:20,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:20,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:20,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:20,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:20,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:20,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:20,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:20,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:20,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:20,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:20,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:20,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:20,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:20,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:20,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:20,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:20,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612398000] [2020-10-12 16:21:20,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:20,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:21:20,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842876731] [2020-10-12 16:21:20,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:21:20,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:21:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:21:20,947 INFO L87 Difference]: Start difference. First operand 449 states and 561 transitions. Second operand 40 states. [2020-10-12 16:21:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:22,853 INFO L93 Difference]: Finished difference Result 914 states and 1146 transitions. [2020-10-12 16:21:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:21:22,853 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 126 [2020-10-12 16:21:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:22,855 INFO L225 Difference]: With dead ends: 914 [2020-10-12 16:21:22,855 INFO L226 Difference]: Without dead ends: 477 [2020-10-12 16:21:22,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2115, Invalid=3737, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:21:22,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-10-12 16:21:22,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 460. [2020-10-12 16:21:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-12 16:21:22,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 574 transitions. [2020-10-12 16:21:22,897 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 574 transitions. Word has length 126 [2020-10-12 16:21:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:22,897 INFO L479 AbstractCegarLoop]: Abstraction has 460 states and 574 transitions. [2020-10-12 16:21:22,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:21:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 574 transitions. [2020-10-12 16:21:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-12 16:21:22,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:22,898 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:22,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:21:22,899 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:22,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1776243673, now seen corresponding path program 36 times [2020-10-12 16:21:22,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:22,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282771743] [2020-10-12 16:21:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:22,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:22,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:23,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:23,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-12 16:21:23,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:23,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-12 16:21:23,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:21:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-12 16:21:23,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:24,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:24,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:24,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:24,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:24,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:24,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:24,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:24,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:24,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:24,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:24,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:24,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:24,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:24,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:24,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:24,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:24,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:24,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:24,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:24,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282771743] [2020-10-12 16:21:24,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:24,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:21:24,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833565569] [2020-10-12 16:21:24,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:21:24,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:24,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:21:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:21:24,504 INFO L87 Difference]: Start difference. First operand 460 states and 574 transitions. Second operand 41 states. [2020-10-12 16:21:26,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:26,528 INFO L93 Difference]: Finished difference Result 941 states and 1179 transitions. [2020-10-12 16:21:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:21:26,529 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 129 [2020-10-12 16:21:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:26,531 INFO L225 Difference]: With dead ends: 941 [2020-10-12 16:21:26,531 INFO L226 Difference]: Without dead ends: 493 [2020-10-12 16:21:26,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2229, Invalid=3933, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:21:26,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2020-10-12 16:21:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 474. [2020-10-12 16:21:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2020-10-12 16:21:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 591 transitions. [2020-10-12 16:21:26,575 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 591 transitions. Word has length 129 [2020-10-12 16:21:26,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:26,575 INFO L479 AbstractCegarLoop]: Abstraction has 474 states and 591 transitions. [2020-10-12 16:21:26,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:21:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 591 transitions. [2020-10-12 16:21:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 16:21:26,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:26,577 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:26,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:21:26,577 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:26,578 INFO L82 PathProgramCache]: Analyzing trace with hash -869893191, now seen corresponding path program 19 times [2020-10-12 16:21:26,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:26,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639873032] [2020-10-12 16:21:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:26,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:26,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:26,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:27,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:27,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:27,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 16:21:28,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:21:28,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1558 [2020-10-12 16:21:28,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:21:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 16:21:28,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:29,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:29,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:29,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:29,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:29,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:29,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:29,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:29,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:29,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:29,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:29,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:29,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:29,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:29,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:29,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639873032] [2020-10-12 16:21:29,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:29,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:21:29,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356924354] [2020-10-12 16:21:29,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:21:29,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:29,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:21:29,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=1057, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:21:29,444 INFO L87 Difference]: Start difference. First operand 474 states and 591 transitions. Second operand 43 states. [2020-10-12 16:21:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:37,814 INFO L93 Difference]: Finished difference Result 1085 states and 1368 transitions. [2020-10-12 16:21:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2020-10-12 16:21:37,815 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 132 [2020-10-12 16:21:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:37,818 INFO L225 Difference]: With dead ends: 1085 [2020-10-12 16:21:37,818 INFO L226 Difference]: Without dead ends: 623 [2020-10-12 16:21:37,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13247 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=10495, Invalid=27335, Unknown=0, NotChecked=0, Total=37830 [2020-10-12 16:21:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-12 16:21:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 604. [2020-10-12 16:21:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2020-10-12 16:21:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 765 transitions. [2020-10-12 16:21:37,877 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 765 transitions. Word has length 132 [2020-10-12 16:21:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:37,877 INFO L479 AbstractCegarLoop]: Abstraction has 604 states and 765 transitions. [2020-10-12 16:21:37,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:21:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 765 transitions. [2020-10-12 16:21:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 16:21:37,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:37,879 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:37,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:21:37,879 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1849726215, now seen corresponding path program 37 times [2020-10-12 16:21:37,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:37,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019985501] [2020-10-12 16:21:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:37,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:37,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:38,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:38,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 16:21:38,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:38,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-12 16:21:38,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:38,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:21:38,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:38,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-12 16:21:38,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:39,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:39,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:39,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:39,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:39,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:39,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:39,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:39,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:39,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:39,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:39,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:39,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:39,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:39,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:39,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:39,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:39,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019985501] [2020-10-12 16:21:39,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:39,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:21:39,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457954777] [2020-10-12 16:21:39,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:21:39,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:39,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:21:39,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:21:39,659 INFO L87 Difference]: Start difference. First operand 604 states and 765 transitions. Second operand 42 states. [2020-10-12 16:21:41,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:41,581 INFO L93 Difference]: Finished difference Result 1240 states and 1575 transitions. [2020-10-12 16:21:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:21:41,581 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 132 [2020-10-12 16:21:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:41,584 INFO L225 Difference]: With dead ends: 1240 [2020-10-12 16:21:41,584 INFO L226 Difference]: Without dead ends: 648 [2020-10-12 16:21:41,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2346, Invalid=4134, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:21:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-10-12 16:21:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 623. [2020-10-12 16:21:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-10-12 16:21:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 787 transitions. [2020-10-12 16:21:41,631 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 787 transitions. Word has length 132 [2020-10-12 16:21:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:41,631 INFO L479 AbstractCegarLoop]: Abstraction has 623 states and 787 transitions. [2020-10-12 16:21:41,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:21:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 787 transitions. [2020-10-12 16:21:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-12 16:21:41,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:41,632 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:41,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:21:41,632 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash -534813977, now seen corresponding path program 38 times [2020-10-12 16:21:41,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:41,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365514807] [2020-10-12 16:21:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:41,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:42,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:42,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-12 16:21:42,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-12 16:21:42,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:21:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-12 16:21:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:43,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:43,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:43,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:43,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:43,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:43,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:43,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:43,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:43,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:43,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:43,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:43,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:43,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:43,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:43,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:43,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:43,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:43,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:43,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365514807] [2020-10-12 16:21:43,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:43,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:21:43,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973403739] [2020-10-12 16:21:43,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:21:43,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:43,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:21:43,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:21:43,470 INFO L87 Difference]: Start difference. First operand 623 states and 787 transitions. Second operand 43 states. [2020-10-12 16:21:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:45,744 INFO L93 Difference]: Finished difference Result 1284 states and 1628 transitions. [2020-10-12 16:21:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:21:45,745 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 135 [2020-10-12 16:21:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:45,747 INFO L225 Difference]: With dead ends: 1284 [2020-10-12 16:21:45,747 INFO L226 Difference]: Without dead ends: 673 [2020-10-12 16:21:45,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2466, Invalid=4340, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:21:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2020-10-12 16:21:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 646. [2020-10-12 16:21:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-10-12 16:21:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 815 transitions. [2020-10-12 16:21:45,799 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 815 transitions. Word has length 135 [2020-10-12 16:21:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:45,799 INFO L479 AbstractCegarLoop]: Abstraction has 646 states and 815 transitions. [2020-10-12 16:21:45,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:21:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 815 transitions. [2020-10-12 16:21:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 16:21:45,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:45,800 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:45,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:21:45,800 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:45,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1401205511, now seen corresponding path program 20 times [2020-10-12 16:21:45,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:45,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109533260] [2020-10-12 16:21:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:45,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:45,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:45,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:45,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:46,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:46,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:46,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:47,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:47,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:47,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 16:21:47,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:21:47,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1881 [2020-10-12 16:21:47,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:47,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:21:47,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:47,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-12 16:21:47,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:49,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:49,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:49,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:49,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:49,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:49,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:49,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:49,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:49,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:49,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:49,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:49,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:49,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:49,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109533260] [2020-10-12 16:21:49,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:49,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:21:49,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446948582] [2020-10-12 16:21:49,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:21:49,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:49,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:21:49,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1152, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:21:49,122 INFO L87 Difference]: Start difference. First operand 646 states and 815 transitions. Second operand 45 states. [2020-10-12 16:21:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:54,259 INFO L93 Difference]: Finished difference Result 1431 states and 1819 transitions. [2020-10-12 16:21:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-12 16:21:54,260 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 138 [2020-10-12 16:21:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:54,263 INFO L225 Difference]: With dead ends: 1431 [2020-10-12 16:21:54,263 INFO L226 Difference]: Without dead ends: 795 [2020-10-12 16:21:54,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3428 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4983, Invalid=11019, Unknown=0, NotChecked=0, Total=16002 [2020-10-12 16:21:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-10-12 16:21:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 497. [2020-10-12 16:21:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-12 16:21:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 621 transitions. [2020-10-12 16:21:54,315 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 621 transitions. Word has length 138 [2020-10-12 16:21:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:54,315 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 621 transitions. [2020-10-12 16:21:54,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:21:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 621 transitions. [2020-10-12 16:21:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 16:21:54,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:54,316 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:54,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:21:54,316 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1913928761, now seen corresponding path program 39 times [2020-10-12 16:21:54,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:54,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811683400] [2020-10-12 16:21:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:54,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:54,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:54,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:54,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 16:21:54,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-12 16:21:54,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:21:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-12 16:21:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:56,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:56,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:56,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:56,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:56,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:56,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:56,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:21:56,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:56,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:21:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:56,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:56,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:56,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:56,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:56,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:56,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:56,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:56,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:56,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:56,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:56,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811683400] [2020-10-12 16:21:56,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:56,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:21:56,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028462262] [2020-10-12 16:21:56,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:21:56,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:56,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:21:56,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:21:56,331 INFO L87 Difference]: Start difference. First operand 497 states and 621 transitions. Second operand 44 states. [2020-10-12 16:21:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:58,775 INFO L93 Difference]: Finished difference Result 1010 states and 1266 transitions. [2020-10-12 16:21:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:21:58,776 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 138 [2020-10-12 16:21:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:58,778 INFO L225 Difference]: With dead ends: 1010 [2020-10-12 16:21:58,778 INFO L226 Difference]: Without dead ends: 525 [2020-10-12 16:21:58,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2589, Invalid=4551, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 16:21:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-12 16:21:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 508. [2020-10-12 16:21:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-12 16:21:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 634 transitions. [2020-10-12 16:21:58,828 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 634 transitions. Word has length 138 [2020-10-12 16:21:58,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:58,828 INFO L479 AbstractCegarLoop]: Abstraction has 508 states and 634 transitions. [2020-10-12 16:21:58,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:21:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 634 transitions. [2020-10-12 16:21:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-12 16:21:58,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:58,829 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:58,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:21:58,830 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:58,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1905653337, now seen corresponding path program 40 times [2020-10-12 16:21:58,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:58,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99555109] [2020-10-12 16:21:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:58,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:58,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:59,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:59,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-12 16:21:59,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:59,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-12 16:21:59,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:59,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:21:59,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:21:59,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-12 16:21:59,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:00,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:00,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:00,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:00,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:00,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:00,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:00,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:00,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:00,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:00,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:22:00,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:00,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:22:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:00,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:00,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:00,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:00,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:00,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:00,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:00,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:00,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99555109] [2020-10-12 16:22:00,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:00,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:22:00,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650882675] [2020-10-12 16:22:00,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:22:00,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:00,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:22:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:22:00,905 INFO L87 Difference]: Start difference. First operand 508 states and 634 transitions. Second operand 45 states. [2020-10-12 16:22:03,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:03,253 INFO L93 Difference]: Finished difference Result 1037 states and 1299 transitions. [2020-10-12 16:22:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:22:03,254 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 141 [2020-10-12 16:22:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:03,256 INFO L225 Difference]: With dead ends: 1037 [2020-10-12 16:22:03,256 INFO L226 Difference]: Without dead ends: 541 [2020-10-12 16:22:03,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2715, Invalid=4767, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:22:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-10-12 16:22:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 522. [2020-10-12 16:22:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-12 16:22:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 651 transitions. [2020-10-12 16:22:03,308 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 651 transitions. Word has length 141 [2020-10-12 16:22:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:03,309 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 651 transitions. [2020-10-12 16:22:03,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:22:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 651 transitions. [2020-10-12 16:22:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 16:22:03,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:03,310 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:03,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:22:03,310 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash 767438393, now seen corresponding path program 21 times [2020-10-12 16:22:03,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:03,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404418024] [2020-10-12 16:22:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:03,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:03,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:03,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:03,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:03,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:03,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:04,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:05,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:05,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:05,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 16:22:05,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:22:05,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-12 16:22:05,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:22:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:22:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-12 16:22:05,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:07,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:07,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:07,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:07,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:07,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:07,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:07,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:07,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:07,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:07,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:22:07,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:07,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:22:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:07,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:07,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:07,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:07,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:07,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:07,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:07,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:07,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404418024] [2020-10-12 16:22:07,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:07,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:22:07,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22017313] [2020-10-12 16:22:07,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:22:07,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:22:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1251, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:22:07,223 INFO L87 Difference]: Start difference. First operand 522 states and 651 transitions. Second operand 47 states. [2020-10-12 16:22:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:12,970 INFO L93 Difference]: Finished difference Result 1188 states and 1497 transitions. [2020-10-12 16:22:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-12 16:22:12,971 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 144 [2020-10-12 16:22:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:12,974 INFO L225 Difference]: With dead ends: 1188 [2020-10-12 16:22:12,974 INFO L226 Difference]: Without dead ends: 677 [2020-10-12 16:22:12,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5483, Invalid=12073, Unknown=0, NotChecked=0, Total=17556 [2020-10-12 16:22:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-10-12 16:22:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 521. [2020-10-12 16:22:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-12 16:22:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 651 transitions. [2020-10-12 16:22:13,044 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 651 transitions. Word has length 144 [2020-10-12 16:22:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:13,045 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 651 transitions. [2020-10-12 16:22:13,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:22:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 651 transitions. [2020-10-12 16:22:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 16:22:13,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:13,046 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:13,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:22:13,046 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:13,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:13,047 INFO L82 PathProgramCache]: Analyzing trace with hash -212394631, now seen corresponding path program 41 times [2020-10-12 16:22:13,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:13,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938133182] [2020-10-12 16:22:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:13,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:13,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:13,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:13,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 16:22:13,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:13,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-12 16:22:13,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:13,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:22:13,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:22:13,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-12 16:22:13,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:15,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:15,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:15,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:15,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:15,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:15,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:15,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:15,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:15,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:15,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:22:15,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:15,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:22:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:15,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:15,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:15,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:15,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:15,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:15,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:15,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:15,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:15,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:15,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938133182] [2020-10-12 16:22:15,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:15,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:22:15,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141133862] [2020-10-12 16:22:15,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:22:15,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:15,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:22:15,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:22:15,203 INFO L87 Difference]: Start difference. First operand 521 states and 651 transitions. Second operand 46 states. [2020-10-12 16:22:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:17,948 INFO L93 Difference]: Finished difference Result 1058 states and 1326 transitions. [2020-10-12 16:22:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:22:17,951 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 144 [2020-10-12 16:22:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:17,953 INFO L225 Difference]: With dead ends: 1058 [2020-10-12 16:22:17,953 INFO L226 Difference]: Without dead ends: 549 [2020-10-12 16:22:17,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2844, Invalid=4988, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 16:22:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-12 16:22:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 532. [2020-10-12 16:22:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2020-10-12 16:22:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 664 transitions. [2020-10-12 16:22:18,024 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 664 transitions. Word has length 144 [2020-10-12 16:22:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:18,024 INFO L479 AbstractCegarLoop]: Abstraction has 532 states and 664 transitions. [2020-10-12 16:22:18,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:22:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 664 transitions. [2020-10-12 16:22:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-12 16:22:18,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:18,025 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:18,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:22:18,026 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash -733175705, now seen corresponding path program 42 times [2020-10-12 16:22:18,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:18,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990867727] [2020-10-12 16:22:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:18,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:18,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:18,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:18,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-12 16:22:18,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:18,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-12 16:22:18,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:22:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:22:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-12 16:22:18,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:20,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:20,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:20,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:20,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:20,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:20,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:20,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:22:20,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:20,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:22:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:20,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:20,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:20,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:20,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:20,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:20,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:20,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990867727] [2020-10-12 16:22:20,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:20,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:22:20,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159609997] [2020-10-12 16:22:20,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:22:20,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:22:20,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:22:20,336 INFO L87 Difference]: Start difference. First operand 532 states and 664 transitions. Second operand 47 states. [2020-10-12 16:22:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:22,994 INFO L93 Difference]: Finished difference Result 1085 states and 1359 transitions. [2020-10-12 16:22:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:22:22,995 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 147 [2020-10-12 16:22:22,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:22,997 INFO L225 Difference]: With dead ends: 1085 [2020-10-12 16:22:22,998 INFO L226 Difference]: Without dead ends: 565 [2020-10-12 16:22:23,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2976, Invalid=5214, Unknown=0, NotChecked=0, Total=8190 [2020-10-12 16:22:23,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2020-10-12 16:22:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 546. [2020-10-12 16:22:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-10-12 16:22:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 681 transitions. [2020-10-12 16:22:23,056 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 681 transitions. Word has length 147 [2020-10-12 16:22:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:23,056 INFO L479 AbstractCegarLoop]: Abstraction has 546 states and 681 transitions. [2020-10-12 16:22:23,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:22:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 681 transitions. [2020-10-12 16:22:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 16:22:23,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:23,057 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:23,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:22:23,057 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:23,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash -920445063, now seen corresponding path program 22 times [2020-10-12 16:22:23,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:23,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107575778] [2020-10-12 16:22:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:23,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:24,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:24,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:24,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:24,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:25,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:25,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 16:22:25,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:22:25,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2489 [2020-10-12 16:22:25,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:22:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:22:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-12 16:22:25,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:27,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:27,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:27,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:27,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:27,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:27,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:27,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:22:27,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:27,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:22:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:27,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:27,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:27,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:27,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:27,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:27,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:27,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107575778] [2020-10-12 16:22:27,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:27,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:22:27,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329018173] [2020-10-12 16:22:27,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:22:27,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:27,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:22:27,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1354, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:22:27,401 INFO L87 Difference]: Start difference. First operand 546 states and 681 transitions. Second operand 49 states. [2020-10-12 16:22:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:33,637 INFO L93 Difference]: Finished difference Result 1242 states and 1565 transitions. [2020-10-12 16:22:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-12 16:22:33,638 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 150 [2020-10-12 16:22:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:33,642 INFO L225 Difference]: With dead ends: 1242 [2020-10-12 16:22:33,642 INFO L226 Difference]: Without dead ends: 707 [2020-10-12 16:22:33,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4124 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6007, Invalid=13175, Unknown=0, NotChecked=0, Total=19182 [2020-10-12 16:22:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2020-10-12 16:22:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 545. [2020-10-12 16:22:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-10-12 16:22:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 681 transitions. [2020-10-12 16:22:33,702 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 681 transitions. Word has length 150 [2020-10-12 16:22:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:33,702 INFO L479 AbstractCegarLoop]: Abstraction has 545 states and 681 transitions. [2020-10-12 16:22:33,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:22:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 681 transitions. [2020-10-12 16:22:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 16:22:33,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:33,703 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:33,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:22:33,703 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:33,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1900278087, now seen corresponding path program 43 times [2020-10-12 16:22:33,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:33,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121060520] [2020-10-12 16:22:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:33,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:34,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:34,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 16:22:34,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:34,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-12 16:22:34,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:34,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:22:34,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:22:34,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-12 16:22:34,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:36,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:36,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:36,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:36,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:36,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:36,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:36,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:36,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:36,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:36,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:22:36,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:36,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:22:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:36,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:36,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:36,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:36,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:36,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:36,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:36,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:36,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:36,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:36,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:36,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121060520] [2020-10-12 16:22:36,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:36,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:22:36,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924593419] [2020-10-12 16:22:36,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:22:36,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:36,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:22:36,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:22:36,409 INFO L87 Difference]: Start difference. First operand 545 states and 681 transitions. Second operand 48 states. [2020-10-12 16:22:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:39,366 INFO L93 Difference]: Finished difference Result 1106 states and 1386 transitions. [2020-10-12 16:22:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:22:39,367 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 150 [2020-10-12 16:22:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:39,369 INFO L225 Difference]: With dead ends: 1106 [2020-10-12 16:22:39,369 INFO L226 Difference]: Without dead ends: 573 [2020-10-12 16:22:39,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3111, Invalid=5445, Unknown=0, NotChecked=0, Total=8556 [2020-10-12 16:22:39,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-10-12 16:22:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 556. [2020-10-12 16:22:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-10-12 16:22:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 694 transitions. [2020-10-12 16:22:39,434 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 694 transitions. Word has length 150 [2020-10-12 16:22:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:39,435 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 694 transitions. [2020-10-12 16:22:39,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:22:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 694 transitions. [2020-10-12 16:22:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-12 16:22:39,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:39,436 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:39,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:22:39,436 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:39,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1007888167, now seen corresponding path program 44 times [2020-10-12 16:22:39,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:39,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489925324] [2020-10-12 16:22:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:39,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:40,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:40,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-12 16:22:40,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:40,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-12 16:22:40,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:40,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:22:40,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:22:40,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-12 16:22:40,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:42,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:42,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:42,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:42,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:42,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:42,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:42,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:22:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:42,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:22:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:42,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:42,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:42,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:42,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:42,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:42,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:42,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:42,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:42,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:42,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:42,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489925324] [2020-10-12 16:22:42,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:42,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:22:42,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253491561] [2020-10-12 16:22:42,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:22:42,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:42,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:22:42,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:22:42,065 INFO L87 Difference]: Start difference. First operand 556 states and 694 transitions. Second operand 49 states. [2020-10-12 16:22:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:45,201 INFO L93 Difference]: Finished difference Result 1133 states and 1419 transitions. [2020-10-12 16:22:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:22:45,202 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 153 [2020-10-12 16:22:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:45,205 INFO L225 Difference]: With dead ends: 1133 [2020-10-12 16:22:45,205 INFO L226 Difference]: Without dead ends: 589 [2020-10-12 16:22:45,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3249, Invalid=5681, Unknown=0, NotChecked=0, Total=8930 [2020-10-12 16:22:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-12 16:22:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 570. [2020-10-12 16:22:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-10-12 16:22:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 711 transitions. [2020-10-12 16:22:45,268 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 711 transitions. Word has length 153 [2020-10-12 16:22:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:45,268 INFO L479 AbstractCegarLoop]: Abstraction has 570 states and 711 transitions. [2020-10-12 16:22:45,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:22:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 711 transitions. [2020-10-12 16:22:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 16:22:45,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:45,269 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:45,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:22:45,269 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:45,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1088299193, now seen corresponding path program 23 times [2020-10-12 16:22:45,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:45,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501223475] [2020-10-12 16:22:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:45,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:45,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:45,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:45,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:46,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:46,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:46,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:46,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:47,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:47,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 16:22:47,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:22:47,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2542 [2020-10-12 16:22:47,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:22:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:22:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-12 16:22:47,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:49,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:49,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:49,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:49,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:22:49,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:49,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:49,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:49,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:22:49,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:49,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:22:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:49,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:49,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:49,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:49,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:49,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:22:49,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:49,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501223475] [2020-10-12 16:22:49,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:49,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 16:22:49,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156104787] [2020-10-12 16:22:49,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 16:22:49,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:49,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 16:22:49,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1461, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:22:49,990 INFO L87 Difference]: Start difference. First operand 570 states and 711 transitions. Second operand 51 states. [2020-10-12 16:22:57,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:57,442 INFO L93 Difference]: Finished difference Result 1296 states and 1633 transitions. [2020-10-12 16:22:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-12 16:22:57,443 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 156 [2020-10-12 16:22:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:57,446 INFO L225 Difference]: With dead ends: 1296 [2020-10-12 16:22:57,446 INFO L226 Difference]: Without dead ends: 737 [2020-10-12 16:22:57,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4496 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=6555, Invalid=14325, Unknown=0, NotChecked=0, Total=20880 [2020-10-12 16:22:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2020-10-12 16:22:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 569. [2020-10-12 16:22:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-12 16:22:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 711 transitions. [2020-10-12 16:22:57,512 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 711 transitions. Word has length 156 [2020-10-12 16:22:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:57,512 INFO L479 AbstractCegarLoop]: Abstraction has 569 states and 711 transitions. [2020-10-12 16:22:57,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 16:22:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 711 transitions. [2020-10-12 16:22:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 16:22:57,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:57,514 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:57,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:22:57,514 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:57,514 INFO L82 PathProgramCache]: Analyzing trace with hash 108466169, now seen corresponding path program 45 times [2020-10-12 16:22:57,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:57,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327471439] [2020-10-12 16:22:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:57,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:57,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:58,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:58,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 16:22:58,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:58,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-12 16:22:58,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:58,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:22:58,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:22:58,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-12 16:22:58,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:00,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:00,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:00,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:00,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:00,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:00,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:00,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:00,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:23:00,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:00,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:23:00,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:00,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:23:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:00,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:00,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:00,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:23:00,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:00,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:00,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:00,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:23:00,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:00,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:23:00,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:00,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327471439] [2020-10-12 16:23:00,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:00,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:23:00,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084298961] [2020-10-12 16:23:00,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:23:00,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:00,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:23:00,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:23:00,374 INFO L87 Difference]: Start difference. First operand 569 states and 711 transitions. Second operand 50 states. [2020-10-12 16:23:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:03,976 INFO L93 Difference]: Finished difference Result 1154 states and 1446 transitions. [2020-10-12 16:23:03,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:23:03,978 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 156 [2020-10-12 16:23:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:03,980 INFO L225 Difference]: With dead ends: 1154 [2020-10-12 16:23:03,980 INFO L226 Difference]: Without dead ends: 597 [2020-10-12 16:23:03,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3390, Invalid=5922, Unknown=0, NotChecked=0, Total=9312 [2020-10-12 16:23:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2020-10-12 16:23:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 580. [2020-10-12 16:23:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-10-12 16:23:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 724 transitions. [2020-10-12 16:23:04,048 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 724 transitions. Word has length 156 [2020-10-12 16:23:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:04,049 INFO L479 AbstractCegarLoop]: Abstraction has 580 states and 724 transitions. [2020-10-12 16:23:04,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:23:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 724 transitions. [2020-10-12 16:23:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-12 16:23:04,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:04,050 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:04,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:23:04,050 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:04,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1728683495, now seen corresponding path program 46 times [2020-10-12 16:23:04,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:04,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851767073] [2020-10-12 16:23:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:04,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:04,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:04,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:04,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-12 16:23:04,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:04,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-12 16:23:04,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:04,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:23:04,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:23:04,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-12 16:23:04,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0