/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/array-fpi/brs4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:07:48,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:07:48,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:07:49,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:07:49,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:07:49,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:07:49,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:07:49,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:07:49,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:07:49,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:07:49,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:07:49,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:07:49,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:07:49,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:07:49,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:07:49,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:07:49,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:07:49,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:07:49,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:07:49,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:07:49,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:07:49,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:07:49,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:07:49,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:07:49,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:07:49,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:07:49,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:07:49,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:07:49,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:07:49,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:07:49,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:07:49,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:07:49,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:07:49,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:07:49,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:07:49,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:07:49,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:07:49,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:07:49,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:07:49,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:07:49,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:07:49,034 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 10:07:49,056 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:07:49,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:07:49,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:07:49,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:07:49,058 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:07:49,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:07:49,059 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:07:49,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:07:49,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:07:49,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:07:49,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:07:49,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:07:49,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:07:49,060 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:07:49,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:07:49,060 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:07:49,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:07:49,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:07:49,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:07:49,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:07:49,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:07:49,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:07:49,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:07:49,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:07:49,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:07:49,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:07:49,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:07:49,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:07:49,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:07:49,063 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 10:07:49,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:07:49,369 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:07:49,372 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:07:49,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:07:49,374 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:07:49,375 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4.c [2020-10-12 10:07:49,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59d51af8b/17d227f1bef44ed896321aad3a377636/FLAGdc0cb51d7 [2020-10-12 10:07:49,826 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:07:49,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4.c [2020-10-12 10:07:49,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59d51af8b/17d227f1bef44ed896321aad3a377636/FLAGdc0cb51d7 [2020-10-12 10:07:50,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59d51af8b/17d227f1bef44ed896321aad3a377636 [2020-10-12 10:07:50,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:07:50,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:07:50,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:07:50,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:07:50,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:07:50,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:07:50" (1/1) ... [2020-10-12 10:07:50,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f54623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50, skipping insertion in model container [2020-10-12 10:07:50,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:07:50" (1/1) ... [2020-10-12 10:07:50,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:07:50,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:07:50,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:07:50,422 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:07:50,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:07:50,460 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:07:50,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50 WrapperNode [2020-10-12 10:07:50,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:07:50,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:07:50,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:07:50,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:07:50,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50" (1/1) ... [2020-10-12 10:07:50,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50" (1/1) ... [2020-10-12 10:07:50,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50" (1/1) ... [2020-10-12 10:07:50,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50" (1/1) ... [2020-10-12 10:07:50,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50" (1/1) ... [2020-10-12 10:07:50,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50" (1/1) ... [2020-10-12 10:07:50,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50" (1/1) ... [2020-10-12 10:07:50,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:07:50,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:07:50,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:07:50,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:07:50,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50" (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 10:07:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:07:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:07:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:07:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:07:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:07:50,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:07:50,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:07:50,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:07:50,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:07:50,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:07:50,898 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:07:50,898 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:07:50,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:07:50 BoogieIcfgContainer [2020-10-12 10:07:50,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:07:50,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:07:50,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:07:50,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:07:50,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:07:50" (1/3) ... [2020-10-12 10:07:50,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2a1dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:07:50, skipping insertion in model container [2020-10-12 10:07:50,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:50" (2/3) ... [2020-10-12 10:07:50,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2a1dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:07:50, skipping insertion in model container [2020-10-12 10:07:50,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:07:50" (3/3) ... [2020-10-12 10:07:50,911 INFO L109 eAbstractionObserver]: Analyzing ICFG brs4.c [2020-10-12 10:07:50,922 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:07:50,930 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:07:50,944 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:07:50,968 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:07:50,969 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:07:50,969 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:07:50,969 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:07:50,969 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:07:50,969 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:07:50,970 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:07:50,970 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:07:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-12 10:07:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:07:50,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:50,997 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 10:07:50,998 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:51,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:51,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-10-12 10:07:51,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:51,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769854514] [2020-10-12 10:07:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:51,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:51,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 10:07:51,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:51,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-12 10:07:51,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:51,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:07:51,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:07:51,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:07:51,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:07:51,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:51,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:51,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:51,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:51,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:07:51,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:51,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:51,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:51,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:51,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:07:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:51,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:51,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:51,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:51,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:07:51,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:07:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:07:51,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:07:51,636 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 10:07:51,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769854514] [2020-10-12 10:07:51,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:07:51,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 10:07:51,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557102269] [2020-10-12 10:07:51,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:07:51,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:51,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:07:51,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:07:51,663 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-10-12 10:07:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:51,837 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-10-12 10:07:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:07:51,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-12 10:07:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:51,848 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:07:51,849 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 10:07:51,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 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 10:07:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 10:07:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 10:07:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 10:07:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-12 10:07:51,896 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-10-12 10:07:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:51,897 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-12 10:07:51,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:07:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-12 10:07:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:07:51,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:51,899 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, 1, 1, 1] [2020-10-12 10:07:51,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:07:51,899 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-10-12 10:07:51,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:51,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805048989] [2020-10-12 10:07:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:51,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:52,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:07:52,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:52,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-12 10:07:52,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:52,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:07:52,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:07:52,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:07:52,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:52,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:52,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:52,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:52,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:52,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:07:52,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:52,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:52,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:52,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:52,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:52,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:07:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:52,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:52,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:52,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:52,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:52,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:52,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:52,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:52,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:52,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:07:52,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805048989] [2020-10-12 10:07:52,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:52,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:07:52,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369939804] [2020-10-12 10:07:52,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:07:52,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:52,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:07:52,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:07:52,479 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2020-10-12 10:07:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:52,721 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-12 10:07:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:07:52,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-12 10:07:52,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:52,724 INFO L225 Difference]: With dead ends: 37 [2020-10-12 10:07:52,724 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 10:07:52,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:07:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 10:07:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-12 10:07:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 10:07:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-12 10:07:52,733 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-10-12 10:07:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:52,734 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-12 10:07:52,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:07:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-12 10:07:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:07:52,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:52,735 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, 1, 1, 1] [2020-10-12 10:07:52,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:07:52,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:52,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-10-12 10:07:52,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:52,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734346920] [2020-10-12 10:07:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:52,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:53,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:53,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:07:53,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:53,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-12 10:07:53,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:07:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:07:53,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:07:53,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:53,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:53,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:53,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:53,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:53,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:53,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:53,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:53,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:53,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:53,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:07:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:53,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:53,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:53,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:53,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:53,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:53,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:53,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:53,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:53,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:07:53,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734346920] [2020-10-12 10:07:53,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:53,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:07:53,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300354724] [2020-10-12 10:07:53,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:07:53,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:53,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:07:53,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:07:53,293 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-12 10:07:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:53,565 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-12 10:07:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:07:53,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-12 10:07:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:53,567 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:07:53,567 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 10:07:53,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:07:53,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 10:07:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-12 10:07:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:07:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-12 10:07:53,576 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-10-12 10:07:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:53,576 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-12 10:07:53,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:07:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-12 10:07:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:07:53,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:53,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2020-10-12 10:07:53,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:07:53,578 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-10-12 10:07:53,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:53,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045955181] [2020-10-12 10:07:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:53,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:53,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:53,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:53,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:53,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:55,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:55,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:55,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:57,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:57,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:57,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:57,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 10:07:57,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 10:07:57,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3887 [2020-10-12 10:07:57,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:07:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:07:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:07:57,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:57,886 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-10-12 10:07:58,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:58,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:58,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:58,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:58,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:58,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:58,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:58,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:07:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:58,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:58,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:58,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:58,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:58,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:58,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:07:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:07:58,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:07:58,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045955181] [2020-10-12 10:07:58,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:58,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:07:58,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958818255] [2020-10-12 10:07:58,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:07:58,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:07:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:07:58,306 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 18 states. [2020-10-12 10:07:58,627 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-12 10:07:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:59,403 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-12 10:07:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:07:59,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-12 10:07:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:59,405 INFO L225 Difference]: With dead ends: 50 [2020-10-12 10:07:59,405 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 10:07:59,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:07:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 10:07:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-10-12 10:07:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:07:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-12 10:07:59,419 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 33 [2020-10-12 10:07:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:59,419 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-12 10:07:59,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:07:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-12 10:07:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:07:59,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:59,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1] [2020-10-12 10:07:59,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:07:59,424 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:59,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-10-12 10:07:59,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:59,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257424111] [2020-10-12 10:07:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:59,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:01,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:01,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:02,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:03,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:03,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:03,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:03,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:04,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:04,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:04,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:08:04,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:08:04,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4874 [2020-10-12 10:08:04,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:04,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:08:04,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:08:04,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:08:04,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:04,875 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-12 10:08:05,025 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-12 10:08:05,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:05,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:05,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:05,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:05,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:05,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:08:05,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:05,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:05,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:05,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:05,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:05,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:05,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:05,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:05,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:05,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257424111] [2020-10-12 10:08:05,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:05,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:08:05,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147727693] [2020-10-12 10:08:05,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:08:05,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:05,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:08:05,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:08:05,567 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 20 states. [2020-10-12 10:08:06,017 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-12 10:08:06,470 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-10-12 10:08:06,759 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-10-12 10:08:06,988 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-12 10:08:07,182 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-10-12 10:08:07,457 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-12 10:08:07,657 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-12 10:08:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:08,177 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-12 10:08:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:08:08,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-12 10:08:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:08,179 INFO L225 Difference]: With dead ends: 64 [2020-10-12 10:08:08,179 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:08:08,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:08:08,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:08:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-12 10:08:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 10:08:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-12 10:08:08,190 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 36 [2020-10-12 10:08:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:08,190 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-12 10:08:08,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:08:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-12 10:08:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:08:08,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:08,192 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 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 10:08:08,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:08:08,192 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:08,192 INFO L82 PathProgramCache]: Analyzing trace with hash -768762887, now seen corresponding path program 3 times [2020-10-12 10:08:08,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:08,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909902833] [2020-10-12 10:08:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:09,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:09,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:09,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:09,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:09,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:09,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:10,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:10,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:10,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:10,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:10,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:10,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:13,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:08:13,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 42 [2020-10-12 10:08:13,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:08:13,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:08:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:08:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:08:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:13,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:13,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:13,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:13,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:13,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:13,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:13,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:13,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:13,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:13,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:13,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:13,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:13,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:13,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:13,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:13,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:13,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:13,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:13,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:13,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:13,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909902833] [2020-10-12 10:08:13,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:13,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:08:13,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103408978] [2020-10-12 10:08:13,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:08:13,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:08:13,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:08:13,952 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 21 states. [2020-10-12 10:08:15,393 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-12 10:08:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:15,938 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-10-12 10:08:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:08:15,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-12 10:08:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:15,942 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:08:15,942 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 10:08:15,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:08:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 10:08:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-10-12 10:08:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:08:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-12 10:08:15,957 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 39 [2020-10-12 10:08:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:15,957 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-12 10:08:15,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:08:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-12 10:08:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:08:15,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:15,958 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1] [2020-10-12 10:08:15,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:08:15,959 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash -67698309, now seen corresponding path program 4 times [2020-10-12 10:08:15,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:15,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453780374] [2020-10-12 10:08:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:15,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:15,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:18,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:18,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:19,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:20,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:08:20,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 10:08:20,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:08:20,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:08:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:08:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:08:20,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:21,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:21,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:21,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:21,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:21,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:21,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:21,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:08:21,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:21,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:21,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:21,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:21,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:21,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:21,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:21,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:21,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:21,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:08:21,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453780374] [2020-10-12 10:08:21,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:21,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:08:21,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017794849] [2020-10-12 10:08:21,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:08:21,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:08:21,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:08:21,175 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 15 states. [2020-10-12 10:08:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:21,599 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-10-12 10:08:21,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:08:21,599 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-12 10:08:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:21,600 INFO L225 Difference]: With dead ends: 114 [2020-10-12 10:08:21,601 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 10:08:21,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:08:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 10:08:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-10-12 10:08:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:08:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-12 10:08:21,614 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 39 [2020-10-12 10:08:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:21,614 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-12 10:08:21,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:08:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-12 10:08:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:08:21,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:21,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 10:08:21,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:08:21,616 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash 925984472, now seen corresponding path program 5 times [2020-10-12 10:08:21,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:21,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699079537] [2020-10-12 10:08:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:21,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:22,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:22,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:22,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:22,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:22,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:23,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:23,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:24,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:24,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:24,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:24,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:24,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:24,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:26,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:08:26,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-12 10:08:26,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-12 10:08:26,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:08:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:08:26,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:08:26,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:27,240 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2020-10-12 10:08:27,376 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2020-10-12 10:08:27,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:27,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:27,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:27,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:27,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:27,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:27,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:27,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:27,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:27,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:27,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:27,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:27,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:27,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:27,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:27,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:27,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:27,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:27,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:27,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:27,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:27,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:27,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699079537] [2020-10-12 10:08:27,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:27,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:08:27,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669948698] [2020-10-12 10:08:27,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:08:27,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:27,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:08:27,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:08:27,896 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 22 states. [2020-10-12 10:08:28,771 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-12 10:08:29,275 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-12 10:08:29,593 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-12 10:08:29,834 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 10:08:29,992 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-12 10:08:30,189 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-12 10:08:30,356 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-12 10:08:30,846 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-10-12 10:08:31,104 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-12 10:08:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:31,627 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2020-10-12 10:08:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:08:31,627 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-10-12 10:08:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:31,630 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:08:31,630 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 10:08:31,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:08:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 10:08:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 69. [2020-10-12 10:08:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 10:08:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-10-12 10:08:31,651 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 39 [2020-10-12 10:08:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:31,652 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-10-12 10:08:31,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:08:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-10-12 10:08:31,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:08:31,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:31,653 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1] [2020-10-12 10:08:31,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:08:31,654 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:31,654 INFO L82 PathProgramCache]: Analyzing trace with hash 295677591, now seen corresponding path program 6 times [2020-10-12 10:08:31,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:31,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550350831] [2020-10-12 10:08:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:31,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:32,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:32,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:32,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:32,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:33,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:33,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:33,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:36,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:08:36,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 10:08:36,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:08:36,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:08:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:08:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:08:36,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:37,365 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-12 10:08:37,528 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-12 10:08:38,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:38,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:38,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:38,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:38,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:38,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:38,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:38,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:38,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:38,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:38,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:38,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:38,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:38,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:38,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:38,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:38,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:38,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:38,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550350831] [2020-10-12 10:08:38,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:38,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:08:38,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742546382] [2020-10-12 10:08:38,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:08:38,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:38,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:08:38,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:08:38,134 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 24 states. [2020-10-12 10:08:39,753 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 109 [2020-10-12 10:08:40,126 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-12 10:08:40,390 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-12 10:08:40,648 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-12 10:08:40,844 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 10:08:41,018 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-12 10:08:41,258 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-10-12 10:08:41,526 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-10-12 10:08:41,937 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 10:08:42,694 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 118 [2020-10-12 10:08:43,107 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 10:08:43,294 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-12 10:08:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:43,435 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2020-10-12 10:08:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:08:43,436 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-10-12 10:08:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:43,438 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:08:43,438 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 10:08:43,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=387, Invalid=2919, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:08:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 10:08:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-10-12 10:08:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 10:08:43,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-10-12 10:08:43,456 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 42 [2020-10-12 10:08:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:43,456 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-10-12 10:08:43,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:08:43,456 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-10-12 10:08:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:08:43,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:43,457 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1] [2020-10-12 10:08:43,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:08:43,458 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:43,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1289360372, now seen corresponding path program 7 times [2020-10-12 10:08:43,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:43,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127672430] [2020-10-12 10:08:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:43,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:47,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:47,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:47,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:47,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:47,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:47,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:48,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:48,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:48,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:48,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:08:48,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-12 10:08:48,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:08:48,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:48,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:08:48,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:08:48,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:08:48,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:49,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:49,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:49,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:49,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:49,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:49,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:49,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:49,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:49,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:49,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:49,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:49,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:49,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:49,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:49,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:49,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:49,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:49,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:49,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127672430] [2020-10-12 10:08:49,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:49,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:08:49,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297110317] [2020-10-12 10:08:49,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:08:49,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:49,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:08:49,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:08:49,553 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 23 states. [2020-10-12 10:08:50,016 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-12 10:08:50,292 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-12 10:08:52,140 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-12 10:08:52,325 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-12 10:08:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:52,494 INFO L93 Difference]: Finished difference Result 197 states and 240 transitions. [2020-10-12 10:08:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:08:52,494 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-12 10:08:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:52,495 INFO L225 Difference]: With dead ends: 197 [2020-10-12 10:08:52,495 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 10:08:52,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=559, Invalid=2197, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:08:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 10:08:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2020-10-12 10:08:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 10:08:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-10-12 10:08:52,515 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 42 [2020-10-12 10:08:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:52,515 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-10-12 10:08:52,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:08:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-10-12 10:08:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 10:08:52,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:52,517 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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, 1] [2020-10-12 10:08:52,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:08:52,517 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash 420403832, now seen corresponding path program 8 times [2020-10-12 10:08:52,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:52,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985935439] [2020-10-12 10:08:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:52,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:55,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:55,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:55,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:55,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:56,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:56,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:56,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:57,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:57,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:57,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:57,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:57,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:57,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:08:57,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-12 10:08:57,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:08:57,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:08:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:08:57,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:08:57,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:57,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:57,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:57,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:57,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:57,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:57,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:08:57,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:57,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:57,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:57,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:57,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:57,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:57,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:57,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:57,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:57,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:57,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:57,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:57,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:57,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:08:57,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985935439] [2020-10-12 10:08:57,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:57,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:08:57,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043814873] [2020-10-12 10:08:57,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:08:57,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:57,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:08:57,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:08:57,800 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 17 states. [2020-10-12 10:08:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:58,501 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2020-10-12 10:08:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:08:58,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-12 10:08:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:58,503 INFO L225 Difference]: With dead ends: 178 [2020-10-12 10:08:58,503 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 10:08:58,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:08:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 10:08:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2020-10-12 10:08:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 10:08:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2020-10-12 10:08:58,521 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 45 [2020-10-12 10:08:58,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:58,521 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2020-10-12 10:08:58,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:08:58,521 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2020-10-12 10:08:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 10:08:58,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:58,523 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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 10:08:58,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:08:58,523 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1985438725, now seen corresponding path program 9 times [2020-10-12 10:08:58,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:58,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246196478] [2020-10-12 10:08:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:58,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:01,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:01,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:01,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:01,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:02,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:02,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:02,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:02,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:02,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:03,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:09:03,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-12 10:09:03,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-12 10:09:03,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:09:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:09:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:09:03,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:03,893 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2020-10-12 10:09:04,032 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-12 10:09:04,223 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2020-10-12 10:09:04,355 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-12 10:09:04,537 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 42 [2020-10-12 10:09:04,820 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2020-10-12 10:09:04,986 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2020-10-12 10:09:05,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:05,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:05,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:05,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:05,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:05,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:05,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:05,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:05,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:05,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:05,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:05,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:05,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:05,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:05,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:05,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:05,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:05,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:05,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:09:05,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246196478] [2020-10-12 10:09:05,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:05,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:09:05,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462975503] [2020-10-12 10:09:05,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:09:05,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:09:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:09:05,580 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 25 states. [2020-10-12 10:09:06,610 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 36 [2020-10-12 10:09:07,077 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-12 10:09:07,414 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-12 10:09:08,617 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-12 10:09:09,025 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-12 10:09:09,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:09,763 INFO L93 Difference]: Finished difference Result 171 states and 209 transitions. [2020-10-12 10:09:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:09:09,764 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 45 [2020-10-12 10:09:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:09,766 INFO L225 Difference]: With dead ends: 171 [2020-10-12 10:09:09,766 INFO L226 Difference]: Without dead ends: 163 [2020-10-12 10:09:09,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=681, Invalid=3225, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 10:09:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-12 10:09:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 107. [2020-10-12 10:09:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 10:09:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2020-10-12 10:09:09,791 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 45 [2020-10-12 10:09:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:09,792 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2020-10-12 10:09:09,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:09:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2020-10-12 10:09:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:09:09,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:09,793 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 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 10:09:09,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:09:09,793 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:09,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1343208812, now seen corresponding path program 10 times [2020-10-12 10:09:09,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:09,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249114154] [2020-10-12 10:09:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:09,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:09,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:09,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:09,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:11,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:11,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:14,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:14,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:09:14,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:09:14,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:09:14,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:14,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:09:14,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:09:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:09:14,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:15,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:15,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:15,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:15,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:15,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:15,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:15,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:15,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:15,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:15,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:15,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:15,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:15,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:15,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:15,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:15,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:09:15,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249114154] [2020-10-12 10:09:15,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:15,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:09:15,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772704344] [2020-10-12 10:09:15,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:09:15,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:09:15,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:09:15,164 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 19 states. [2020-10-12 10:09:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:16,301 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2020-10-12 10:09:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:09:16,302 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-12 10:09:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:16,303 INFO L225 Difference]: With dead ends: 161 [2020-10-12 10:09:16,303 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 10:09:16,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:09:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 10:09:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2020-10-12 10:09:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 10:09:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2020-10-12 10:09:16,324 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 48 [2020-10-12 10:09:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:16,324 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2020-10-12 10:09:16,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:09:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2020-10-12 10:09:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:09:16,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:16,325 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 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 10:09:16,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:09:16,326 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:16,326 INFO L82 PathProgramCache]: Analyzing trace with hash 176115899, now seen corresponding path program 11 times [2020-10-12 10:09:16,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:16,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856704566] [2020-10-12 10:09:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:16,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:20,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:21,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:21,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:21,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:09:21,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 10:09:21,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:09:21,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:09:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:09:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:09:21,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:21,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:21,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:21,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:21,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:21,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:21,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:21,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:21,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:21,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:21,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:21,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:21,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:21,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:21,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:21,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:21,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:21,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:21,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:21,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:21,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:21,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:21,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:09:21,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856704566] [2020-10-12 10:09:21,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:21,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:09:21,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442133978] [2020-10-12 10:09:21,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:09:21,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:21,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:09:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:09:21,734 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand 18 states. [2020-10-12 10:09:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:26,622 INFO L93 Difference]: Finished difference Result 278 states and 349 transitions. [2020-10-12 10:09:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:09:26,623 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-12 10:09:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:26,624 INFO L225 Difference]: With dead ends: 278 [2020-10-12 10:09:26,624 INFO L226 Difference]: Without dead ends: 151 [2020-10-12 10:09:26,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=383, Invalid=2166, Unknown=1, NotChecked=0, Total=2550 [2020-10-12 10:09:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-12 10:09:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 65. [2020-10-12 10:09:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 10:09:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-12 10:09:26,640 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 51 [2020-10-12 10:09:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:26,640 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-12 10:09:26,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:09:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-12 10:09:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:09:26,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:26,641 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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 10:09:26,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:09:26,641 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:26,642 INFO L82 PathProgramCache]: Analyzing trace with hash -933102858, now seen corresponding path program 12 times [2020-10-12 10:09:26,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:26,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275710255] [2020-10-12 10:09:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:26,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:27,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:27,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:27,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:27,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:28,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:28,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:28,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:28,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:28,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:29,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:29,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:29,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:29,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:30,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:31,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:31,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:31,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:31,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:31,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:09:31,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 10:09:31,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:09:31,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:31,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:09:31,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:09:31,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:09:31,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:33,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:33,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:33,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:33,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:33,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:33,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:33,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:33,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:33,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:33,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:33,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:33,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:33,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:33,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:33,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:33,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:33,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:33,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:33,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:33,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:33,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:33,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:09:33,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275710255] [2020-10-12 10:09:33,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:33,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:09:33,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40739447] [2020-10-12 10:09:33,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:09:33,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:33,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:09:33,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:09:33,470 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 29 states. [2020-10-12 10:09:35,050 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-12 10:09:35,348 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-12 10:09:35,646 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-12 10:09:35,838 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-12 10:09:36,173 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-12 10:09:36,391 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-12 10:09:36,687 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-12 10:09:36,975 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-12 10:09:37,164 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-12 10:09:37,412 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-12 10:09:37,649 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-12 10:09:37,974 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-12 10:09:38,156 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-12 10:09:38,474 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-12 10:09:38,656 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-12 10:09:38,888 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-12 10:09:39,457 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-12 10:09:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:39,540 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2020-10-12 10:09:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:09:39,541 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 51 [2020-10-12 10:09:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:39,542 INFO L225 Difference]: With dead ends: 118 [2020-10-12 10:09:39,542 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 10:09:39,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=511, Invalid=3271, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 10:09:39,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 10:09:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2020-10-12 10:09:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 10:09:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2020-10-12 10:09:39,563 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 51 [2020-10-12 10:09:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:39,563 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2020-10-12 10:09:39,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:09:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2020-10-12 10:09:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:09:39,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:39,564 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1] [2020-10-12 10:09:39,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:09:39,565 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash -171688519, now seen corresponding path program 13 times [2020-10-12 10:09:39,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:39,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669602640] [2020-10-12 10:09:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:39,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:41,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:44,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:44,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:09:44,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 10:09:44,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:09:44,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:44,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:09:44,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:09:44,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:09:44,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:45,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:45,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:45,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:45,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:45,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:45,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:45,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:45,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:45,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:45,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:45,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:45,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:45,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:45,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:45,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:45,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:45,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:09:45,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669602640] [2020-10-12 10:09:45,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:45,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:09:45,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584796614] [2020-10-12 10:09:45,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:09:45,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:45,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:09:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:09:45,077 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand 21 states. [2020-10-12 10:09:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:46,467 INFO L93 Difference]: Finished difference Result 157 states and 186 transitions. [2020-10-12 10:09:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:09:46,472 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2020-10-12 10:09:46,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:46,473 INFO L225 Difference]: With dead ends: 157 [2020-10-12 10:09:46,474 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 10:09:46,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:09:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 10:09:46,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-10-12 10:09:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 10:09:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2020-10-12 10:09:46,491 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 54 [2020-10-12 10:09:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:46,491 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2020-10-12 10:09:46,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:09:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2020-10-12 10:09:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:09:46,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:46,492 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 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 10:09:46,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:09:46,492 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:46,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1646382932, now seen corresponding path program 14 times [2020-10-12 10:09:46,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:46,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185817815] [2020-10-12 10:09:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:46,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:51,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:51,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:51,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:09:51,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-12 10:09:51,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:09:51,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:09:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:09:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 10:09:51,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:52,762 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-12 10:09:53,059 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-12 10:09:53,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:53,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:53,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:53,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:53,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:53,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:53,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:53,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:53,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:53,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:53,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:53,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:53,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:53,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:53,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:53,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:53,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:53,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:53,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:09:53,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185817815] [2020-10-12 10:09:53,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:53,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:09:53,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980885114] [2020-10-12 10:09:53,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:09:53,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:09:53,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:09:53,883 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand 29 states. [2020-10-12 10:09:54,982 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-12 10:09:55,386 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-12 10:09:55,690 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 55 [2020-10-12 10:09:55,856 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2020-10-12 10:09:56,231 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-12 10:09:56,697 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2020-10-12 10:09:56,995 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-12 10:09:57,299 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2020-10-12 10:09:57,576 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-12 10:09:57,906 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-12 10:09:58,229 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-12 10:09:58,550 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-12 10:09:58,823 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-12 10:09:59,066 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-12 10:09:59,430 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-12 10:09:59,708 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2020-10-12 10:09:59,930 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-12 10:10:00,210 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 60 [2020-10-12 10:10:00,398 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-12 10:10:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:00,766 INFO L93 Difference]: Finished difference Result 215 states and 253 transitions. [2020-10-12 10:10:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 10:10:00,767 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2020-10-12 10:10:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:00,768 INFO L225 Difference]: With dead ends: 215 [2020-10-12 10:10:00,768 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 10:10:00,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=592, Invalid=4100, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 10:10:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 10:10:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2020-10-12 10:10:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 10:10:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2020-10-12 10:10:00,786 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 54 [2020-10-12 10:10:00,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:00,787 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2020-10-12 10:10:00,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:10:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2020-10-12 10:10:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:10:00,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:00,787 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 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 10:10:00,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:10:00,788 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:00,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1786931542, now seen corresponding path program 15 times [2020-10-12 10:10:00,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:00,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49675501] [2020-10-12 10:10:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:00,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:00,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:00,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:00,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:00,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:01,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:01,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:01,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:01,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:01,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:01,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:01,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:01,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:03,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:03,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:04,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:04,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:04,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:04,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:04,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:04,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:04,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:04,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:05,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:05,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:10:05,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-12 10:10:05,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:10:05,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:10:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 10:10:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:10:05,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:06,196 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-10-12 10:10:06,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:06,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:06,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:06,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:06,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:06,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:06,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:10:06,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:06,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:06,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:06,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:06,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:06,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:06,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:06,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:10:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:10:06,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49675501] [2020-10-12 10:10:06,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:06,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:10:06,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381816305] [2020-10-12 10:10:06,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:10:06,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:06,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:10:06,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:10:06,829 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand 20 states. [2020-10-12 10:10:09,115 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-12 10:10:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:09,740 INFO L93 Difference]: Finished difference Result 190 states and 225 transitions. [2020-10-12 10:10:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:10:09,745 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-12 10:10:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:09,746 INFO L225 Difference]: With dead ends: 190 [2020-10-12 10:10:09,746 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 10:10:09,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:10:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 10:10:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 105. [2020-10-12 10:10:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 10:10:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2020-10-12 10:10:09,770 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 54 [2020-10-12 10:10:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:09,770 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2020-10-12 10:10:09,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:10:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2020-10-12 10:10:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:10:09,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:09,771 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 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 10:10:09,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:10:09,772 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash -774851751, now seen corresponding path program 16 times [2020-10-12 10:10:09,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:09,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361895307] [2020-10-12 10:10:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:09,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:13,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:13,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:14,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:14,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:14,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:10:14,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 10:10:14,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:10:14,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:14,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:10:14,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:10:14,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 10:10:14,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:15,316 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-10-12 10:10:15,548 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-10-12 10:10:15,730 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-12 10:10:15,913 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-12 10:10:16,176 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-12 10:10:16,402 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-12 10:10:16,638 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-12 10:10:16,994 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2020-10-12 10:10:17,307 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-12 10:10:17,680 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-12 10:10:18,468 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 79 [2020-10-12 10:10:18,763 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-12 10:10:18,973 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-12 10:10:19,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:19,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:19,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:19,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:19,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:19,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:19,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:19,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:19,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:19,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:19,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:19,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:19,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:19,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:19,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:19,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:19,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:19,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:19,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:10:19,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361895307] [2020-10-12 10:10:19,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:19,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:10:19,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105086884] [2020-10-12 10:10:19,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:10:19,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:19,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:10:19,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:10:19,901 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand 33 states. [2020-10-12 10:10:21,597 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 80 [2020-10-12 10:10:22,170 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 59 [2020-10-12 10:10:22,600 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 67 [2020-10-12 10:10:23,202 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 53 [2020-10-12 10:10:23,559 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 57 [2020-10-12 10:10:24,076 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 81 [2020-10-12 10:10:24,555 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 82 [2020-10-12 10:10:25,025 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 86 [2020-10-12 10:10:25,373 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-12 10:10:25,772 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-10-12 10:10:26,253 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 71 [2020-10-12 10:10:26,719 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 73 [2020-10-12 10:10:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:26,930 INFO L93 Difference]: Finished difference Result 224 states and 274 transitions. [2020-10-12 10:10:26,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:10:26,931 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 57 [2020-10-12 10:10:26,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:26,933 INFO L225 Difference]: With dead ends: 224 [2020-10-12 10:10:26,933 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 10:10:26,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=399, Invalid=3023, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 10:10:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 10:10:26,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-12 10:10:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 10:10:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-10-12 10:10:26,959 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 57 [2020-10-12 10:10:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:26,959 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-10-12 10:10:26,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:10:26,959 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-10-12 10:10:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:10:26,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:26,960 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 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 10:10:26,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:10:26,960 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1183768310, now seen corresponding path program 17 times [2020-10-12 10:10:26,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:26,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665195122] [2020-10-12 10:10:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:26,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:27,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:28,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:28,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:28,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:28,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:28,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:28,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:30,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:30,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:31,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:31,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:10:31,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 43 [2020-10-12 10:10:31,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:10:31,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:10:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:10:31,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:10:31,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:32,664 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2020-10-12 10:10:32,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:32,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:32,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:32,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:32,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:32,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:32,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:32,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:32,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:32,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:32,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:32,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:32,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:32,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:32,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:32,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:32,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:32,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:32,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 24 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:10:32,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665195122] [2020-10-12 10:10:32,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:32,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:10:32,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962968294] [2020-10-12 10:10:32,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:10:32,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:10:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:10:32,924 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 21 states. [2020-10-12 10:10:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:33,894 INFO L93 Difference]: Finished difference Result 166 states and 197 transitions. [2020-10-12 10:10:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:10:33,895 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-12 10:10:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:33,896 INFO L225 Difference]: With dead ends: 166 [2020-10-12 10:10:33,896 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 10:10:33,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:10:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 10:10:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 61. [2020-10-12 10:10:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 10:10:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-12 10:10:33,911 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2020-10-12 10:10:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:33,911 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-12 10:10:33,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:10:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-12 10:10:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 10:10:33,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:33,912 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 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 10:10:33,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:10:33,913 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:33,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1041943291, now seen corresponding path program 18 times [2020-10-12 10:10:33,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:33,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119586036] [2020-10-12 10:10:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:33,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:33,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:33,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:34,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:34,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:34,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:34,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:35,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:35,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:35,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:35,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:35,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:35,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:36,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:36,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:36,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:36,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:37,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:38,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:38,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 10:10:38,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-10-12 10:10:38,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:10:38,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:38,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:10:38,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 10:10:38,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:10:38,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:39,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:39,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:39,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:39,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:39,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:39,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:39,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:39,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:39,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:39,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:39,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:39,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:39,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:39,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:39,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:39,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:39,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:39,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:39,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 35 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:10:39,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119586036] [2020-10-12 10:10:39,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:39,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:10:39,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898251122] [2020-10-12 10:10:39,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:10:39,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:39,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:10:39,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:10:39,765 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 22 states. [2020-10-12 10:10:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:43,125 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-10-12 10:10:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 10:10:43,125 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-12 10:10:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:43,126 INFO L225 Difference]: With dead ends: 125 [2020-10-12 10:10:43,127 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 10:10:43,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=659, Invalid=4171, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 10:10:43,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 10:10:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 86. [2020-10-12 10:10:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 10:10:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-10-12 10:10:43,150 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 60 [2020-10-12 10:10:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:43,150 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-10-12 10:10:43,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:10:43,151 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-10-12 10:10:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 10:10:43,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:43,151 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 3, 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 10:10:43,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:10:43,151 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:43,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1671148436, now seen corresponding path program 19 times [2020-10-12 10:10:43,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:43,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718208000] [2020-10-12 10:10:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:43,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:44,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:44,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:44,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:47,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:47,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:48,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:48,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 10:10:48,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:10:48,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:10:48,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:48,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:10:48,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:10:48,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 10:10:48,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:48,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:48,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:48,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:48,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:48,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:48,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:48,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:48,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:48,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:48,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:48,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:48,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:48,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:48,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:48,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:48,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:48,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:10:48,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718208000] [2020-10-12 10:10:48,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:48,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:10:48,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113233055] [2020-10-12 10:10:48,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:10:48,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:10:48,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:10:48,521 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 22 states. [2020-10-12 10:10:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:49,737 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2020-10-12 10:10:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:10:49,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-12 10:10:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:49,741 INFO L225 Difference]: With dead ends: 175 [2020-10-12 10:10:49,741 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 10:10:49,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=376, Invalid=1264, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:10:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 10:10:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 85. [2020-10-12 10:10:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 10:10:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-10-12 10:10:49,763 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 63 [2020-10-12 10:10:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:49,763 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-10-12 10:10:49,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:10:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-10-12 10:10:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 10:10:49,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:49,764 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 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 10:10:49,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:10:49,764 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:49,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:49,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1922218986, now seen corresponding path program 20 times [2020-10-12 10:10:49,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:49,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022092686] [2020-10-12 10:10:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:49,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:50,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:50,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:50,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:50,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:50,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:51,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:52,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:52,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:52,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:53,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:53,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:54,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:54,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 10:10:54,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:10:54,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:10:54,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:54,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:10:54,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:10:54,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:10:54,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:56,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:56,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:56,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:56,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:56,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:56,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:56,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:56,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:56,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:56,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:56,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:56,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:56,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:56,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:56,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:56,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:56,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:56,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:56,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:10:56,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022092686] [2020-10-12 10:10:56,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:56,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:10:56,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809311779] [2020-10-12 10:10:56,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:10:56,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:56,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:10:56,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=981, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:10:56,650 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 33 states. [2020-10-12 10:10:58,244 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-12 10:10:58,685 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-12 10:11:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:00,509 INFO L93 Difference]: Finished difference Result 164 states and 178 transitions. [2020-10-12 10:11:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:11:00,510 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2020-10-12 10:11:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:00,511 INFO L225 Difference]: With dead ends: 164 [2020-10-12 10:11:00,511 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 10:11:00,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=213, Invalid=2139, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:11:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 10:11:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 68. [2020-10-12 10:11:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 10:11:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-12 10:11:00,537 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2020-10-12 10:11:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:00,537 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-12 10:11:00,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:11:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-12 10:11:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:11:00,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:00,538 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 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, 1] [2020-10-12 10:11:00,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:11:00,539 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash 840360089, now seen corresponding path program 21 times [2020-10-12 10:11:00,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:00,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987816454] [2020-10-12 10:11:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:00,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:00,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:00,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:01,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:01,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:01,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:01,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:02,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:02,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:02,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:02,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:05,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:05,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:05,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 10:11:05,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-12 10:11:05,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:11:05,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:05,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:11:05,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:05,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 10:11:05,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:06,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:06,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:06,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:06,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:06,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:06,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:06,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:06,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:06,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:06,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:06,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:06,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:06,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:11:06,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:06,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:11:06,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987816454] [2020-10-12 10:11:06,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:06,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:11:06,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394787908] [2020-10-12 10:11:06,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:11:06,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:06,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:11:06,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:11:06,534 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 27 states. [2020-10-12 10:11:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:08,926 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-12 10:11:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:11:08,927 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 66 [2020-10-12 10:11:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:08,928 INFO L225 Difference]: With dead ends: 114 [2020-10-12 10:11:08,928 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 10:11:08,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=644, Invalid=2662, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:11:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 10:11:08,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-12 10:11:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 10:11:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-12 10:11:08,959 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 66 [2020-10-12 10:11:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:08,960 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-12 10:11:08,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:11:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-12 10:11:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 10:11:08,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:08,960 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 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 10:11:08,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:11:08,961 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1342170681, now seen corresponding path program 22 times [2020-10-12 10:11:08,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:08,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921066453] [2020-10-12 10:11:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:09,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:09,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:09,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:11,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:12,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:12,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:13,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:13,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:13,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 10:11:13,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:11:13,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:11:13,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:13,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:11:13,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:13,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 10:11:13,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:14,619 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-10-12 10:11:14,866 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2020-10-12 10:11:15,476 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-12 10:11:15,778 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-12 10:11:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:18,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:18,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:18,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:18,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:18,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:18,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:18,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:18,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:18,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:18,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:18,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:18,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:18,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:18,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:18,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:11:18,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:18,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:18,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:18,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:18,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:18,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921066453] [2020-10-12 10:11:18,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:18,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:11:18,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386114068] [2020-10-12 10:11:18,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:11:18,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:18,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:11:18,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1537, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:11:18,398 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 41 states. [2020-10-12 10:11:21,869 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-12 10:11:22,151 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-12 10:11:22,751 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 97 [2020-10-12 10:11:23,424 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-12 10:11:23,677 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2020-10-12 10:11:23,968 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-12 10:11:24,239 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-12 10:11:24,484 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-12 10:11:24,838 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-12 10:11:25,189 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 69 [2020-10-12 10:11:25,554 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 72 [2020-10-12 10:11:25,902 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2020-10-12 10:11:26,322 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 76 [2020-10-12 10:11:26,719 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 76 [2020-10-12 10:11:27,042 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 71 [2020-10-12 10:11:27,404 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2020-10-12 10:11:27,784 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 66 [2020-10-12 10:11:28,071 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2020-10-12 10:11:28,436 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2020-10-12 10:11:28,808 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-10-12 10:11:29,220 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2020-10-12 10:11:29,556 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-12 10:11:29,866 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2020-10-12 10:11:30,093 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-12 10:11:30,541 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 83 [2020-10-12 10:11:30,998 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 86 [2020-10-12 10:11:31,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:31,560 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2020-10-12 10:11:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 10:11:31,562 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 69 [2020-10-12 10:11:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:31,563 INFO L225 Difference]: With dead ends: 124 [2020-10-12 10:11:31,563 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 10:11:31,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=550, Invalid=6932, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 10:11:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 10:11:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-12 10:11:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 10:11:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-12 10:11:31,599 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2020-10-12 10:11:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:31,600 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-12 10:11:31,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:11:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-12 10:11:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 10:11:31,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:31,601 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 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 10:11:31,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:11:31,601 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:31,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:31,602 INFO L82 PathProgramCache]: Analyzing trace with hash -671553642, now seen corresponding path program 23 times [2020-10-12 10:11:31,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:31,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685332054] [2020-10-12 10:11:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:31,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:31,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:32,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:33,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:33,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:33,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:33,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:34,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:34,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:35,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:36,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:36,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 10:11:36,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:11:36,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:11:36,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:36,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:11:36,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:36,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 10:11:36,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:37,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:37,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:37,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:37,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:37,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:37,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:37,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:37,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:37,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:37,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:37,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:37,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:37,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:37,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:37,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:37,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:11:37,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:37,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:37,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:37,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:37,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 39 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:37,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685332054] [2020-10-12 10:11:37,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:37,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:11:37,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489408515] [2020-10-12 10:11:37,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:11:37,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:11:37,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:11:37,695 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 32 states. [2020-10-12 10:11:40,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:40,112 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-10-12 10:11:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 10:11:40,114 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-12 10:11:40,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:40,115 INFO L225 Difference]: With dead ends: 164 [2020-10-12 10:11:40,115 INFO L226 Difference]: Without dead ends: 129 [2020-10-12 10:11:40,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=880, Invalid=3950, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 10:11:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-12 10:11:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2020-10-12 10:11:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 10:11:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2020-10-12 10:11:40,152 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 72 [2020-10-12 10:11:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:40,152 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2020-10-12 10:11:40,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:11:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2020-10-12 10:11:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 10:11:40,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:40,153 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 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 10:11:40,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:11:40,153 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:40,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2050624421, now seen corresponding path program 24 times [2020-10-12 10:11:40,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:40,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506419439] [2020-10-12 10:11:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:45,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 10:11:45,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-12 10:11:45,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:11:45,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:45,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:11:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:11:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 10:11:45,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:45,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:45,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:45,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:45,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:45,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:45,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:45,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:45,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:45,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:45,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:45,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:45,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:45,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:45,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:45,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:45,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:11:45,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:45,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:45,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:45,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:45,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 17 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:45,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506419439] [2020-10-12 10:11:45,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:45,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:11:45,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623197096] [2020-10-12 10:11:45,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:11:45,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:11:45,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:11:45,913 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand 25 states. [2020-10-12 10:11:47,744 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-10-12 10:11:48,624 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-12 10:11:48,799 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-12 10:11:49,073 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-10-12 10:11:49,379 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-12 10:11:49,586 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-12 10:11:49,887 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-12 10:11:50,409 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42