/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=NARROWEST --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/ms4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:07:09,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:07:09,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:07:09,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:07:09,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:07:09,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:07:09,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:07:09,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:07:09,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:07:09,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:07:09,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:07:09,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:07:09,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:07:09,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:07:09,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:07:09,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:07:09,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:07:09,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:07:09,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:07:09,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:07:09,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:07:09,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:07:09,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:07:09,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:07:09,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:07:09,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:07:09,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:07:09,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:07:09,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:07:09,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:07:09,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:07:09,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:07:09,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:07:09,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:07:09,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:07:09,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:07:09,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:07:09,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:07:09,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:07:09,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:07:09,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:07:09,911 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 [2020-10-13 05:07:09,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:07:09,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:07:09,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:07:09,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:07:09,965 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:07:09,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:07:09,966 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:07:09,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:07:09,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:07:09,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:07:09,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:07:09,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:07:09,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:07:09,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:07:09,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:07:09,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:07:09,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:07:09,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:07:09,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:07:09,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:07:09,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:07:09,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:07:09,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:07:09,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:07:09,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:07:09,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:07:09,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:07:09,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:07:09,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:07:09,972 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:07:10,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:07:10,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:07:10,303 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:07:10,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:07:10,305 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:07:10,306 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms4.c [2020-10-13 05:07:10,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e07be2d0/5b353d055634451c9406ebcaad6ecb8a/FLAG57836972a [2020-10-13 05:07:10,873 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:07:10,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms4.c [2020-10-13 05:07:10,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e07be2d0/5b353d055634451c9406ebcaad6ecb8a/FLAG57836972a [2020-10-13 05:07:11,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e07be2d0/5b353d055634451c9406ebcaad6ecb8a [2020-10-13 05:07:11,239 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:07:11,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:07:11,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:11,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:07:11,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:07:11,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:11" (1/1) ... [2020-10-13 05:07:11,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@339faaff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11, skipping insertion in model container [2020-10-13 05:07:11,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:11" (1/1) ... [2020-10-13 05:07:11,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:07:11,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:07:11,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:11,537 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:07:11,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:11,575 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:07:11,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11 WrapperNode [2020-10-13 05:07:11,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:11,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:07:11,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:07:11,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:07:11,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11" (1/1) ... [2020-10-13 05:07:11,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11" (1/1) ... [2020-10-13 05:07:11,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11" (1/1) ... [2020-10-13 05:07:11,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11" (1/1) ... [2020-10-13 05:07:11,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11" (1/1) ... [2020-10-13 05:07:11,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11" (1/1) ... [2020-10-13 05:07:11,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11" (1/1) ... [2020-10-13 05:07:11,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:07:11,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:07:11,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:07:11,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:07:11,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11" (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 [2020-10-13 05:07:11,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:07:11,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:07:11,782 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:07:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:07:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:07:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:07:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:07:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:07:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:07:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:07:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:07:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:07:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:07:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:07:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:07:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:07:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:07:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:07:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:07:12,105 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:07:12,106 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:07:12,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:12 BoogieIcfgContainer [2020-10-13 05:07:12,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:07:12,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:07:12,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:07:12,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:07:12,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:07:11" (1/3) ... [2020-10-13 05:07:12,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed7345b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:12, skipping insertion in model container [2020-10-13 05:07:12,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:11" (2/3) ... [2020-10-13 05:07:12,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed7345b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:12, skipping insertion in model container [2020-10-13 05:07:12,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:12" (3/3) ... [2020-10-13 05:07:12,118 INFO L109 eAbstractionObserver]: Analyzing ICFG ms4.c [2020-10-13 05:07:12,129 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:07:12,136 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:07:12,154 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:07:12,177 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:07:12,178 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:07:12,178 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:07:12,178 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:07:12,178 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:07:12,178 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:07:12,178 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:07:12,179 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:07:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-13 05:07:12,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:07:12,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:12,206 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] [2020-10-13 05:07:12,206 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:12,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:12,213 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-10-13 05:07:12,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:12,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476966442] [2020-10-13 05:07:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:12,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:12,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:07:12,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:07:12,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-13 05:07:12,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:12,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:12,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:07:12,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:12,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:07:12,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:12,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:12,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:12,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:07:12,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:12,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:12,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:12,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:12,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:12,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:12,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:12,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:12,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:12,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:12,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:12,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:07:12,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:12,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:12,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476966442] [2020-10-13 05:07:12,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:12,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:07:12,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002851273] [2020-10-13 05:07:12,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:07:12,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:07:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:07:12,978 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-13 05:07:13,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:13,079 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-13 05:07:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:07:13,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-13 05:07:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:13,090 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:07:13,090 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 05:07:13,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:07:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 05:07:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 05:07:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 05:07:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 05:07:13,136 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-10-13 05:07:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:13,136 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 05:07:13,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:07:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 05:07:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:07:13,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:13,138 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] [2020-10-13 05:07:13,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:07:13,139 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-10-13 05:07:13,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:13,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54596702] [2020-10-13 05:07:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:13,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:13,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:07:13,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:07:13,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-13 05:07:13,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:07:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:07:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:07:13,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:13,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:13,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:13,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:13,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:13,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:13,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:13,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:13,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:13,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:13,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:13,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:13,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:13,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:13,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:13,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:07:13,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:13,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:07:13,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:13,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:07:13,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:13,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54596702] [2020-10-13 05:07:13,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:13,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:07:13,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855850120] [2020-10-13 05:07:13,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:07:13,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:07:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:07:13,437 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-10-13 05:07:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:13,547 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-13 05:07:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:07:13,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 05:07:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:13,549 INFO L225 Difference]: With dead ends: 37 [2020-10-13 05:07:13,549 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 05:07:13,550 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 [2020-10-13 05:07:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 05:07:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 05:07:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 05:07:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 05:07:13,558 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-13 05:07:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:13,559 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 05:07:13,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:07:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 05:07:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:07:13,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:13,560 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] [2020-10-13 05:07:13,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:07:13,561 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:13,562 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-10-13 05:07:13,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:13,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584885751] [2020-10-13 05:07:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:13,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:13,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 05:07:13,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:07:13,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-13 05:07:13,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:13,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:07:13,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:07:13,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:07:13,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:13,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:13,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:13,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:13,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:13,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:13,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:13,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:13,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:13,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:13,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:13,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:13,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:13,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:13,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:13,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:13,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:13,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:13,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:13,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:13,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:13,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584885751] [2020-10-13 05:07:13,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:13,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 05:07:13,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829524021] [2020-10-13 05:07:13,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:07:13,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:13,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:07:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:07:13,949 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-13 05:07:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:14,176 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-13 05:07:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:07:14,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-13 05:07:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:14,178 INFO L225 Difference]: With dead ends: 36 [2020-10-13 05:07:14,178 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 05:07:14,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:07:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 05:07:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-13 05:07:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:07:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 05:07:14,186 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2020-10-13 05:07:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:14,187 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 05:07:14,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:07:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 05:07:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:07:14,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:14,188 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] [2020-10-13 05:07:14,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:07:14,189 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:14,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:14,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1255066423, now seen corresponding path program 1 times [2020-10-13 05:07:14,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:14,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640265957] [2020-10-13 05:07:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:14,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:14,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 05:07:14,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:07:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-13 05:07:14,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:07:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:07:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 05:07:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:14,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:14,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:14,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:14,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:14,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:14,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:14,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:14,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:14,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:14,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:14,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:14,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:14,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:14,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:14,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:14,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:14,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:14,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:14,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640265957] [2020-10-13 05:07:14,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:14,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:07:14,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922857243] [2020-10-13 05:07:14,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:07:14,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:14,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:07:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:07:14,796 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 4 states. [2020-10-13 05:07:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:14,865 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-13 05:07:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:07:14,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-13 05:07:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:14,867 INFO L225 Difference]: With dead ends: 42 [2020-10-13 05:07:14,867 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:07:14,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:07:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:07:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 05:07:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:07:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 05:07:14,876 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-13 05:07:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:14,876 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 05:07:14,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:07:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 05:07:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:07:14,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:14,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:14,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:07:14,878 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:14,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1827351009, now seen corresponding path program 1 times [2020-10-13 05:07:14,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:14,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396579919] [2020-10-13 05:07:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:14,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:16,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:07:16,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:07:16,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-10-13 05:07:16,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:16,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:07:16,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:16,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:07:16,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:16,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:16,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:16,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:16,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:16,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:16,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:16,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:16,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:16,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:16,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:16,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:16,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:16,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:16,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:16,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396579919] [2020-10-13 05:07:16,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:16,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:07:16,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572284588] [2020-10-13 05:07:16,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:07:16,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:16,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:07:16,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:07:16,619 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-13 05:07:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:16,841 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 05:07:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:07:16,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-13 05:07:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:16,843 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:07:16,843 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:07:16,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:07:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:07:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-13 05:07:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 05:07:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 05:07:16,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-10-13 05:07:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:16,852 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 05:07:16,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:07:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 05:07:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 05:07:16,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:16,853 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] [2020-10-13 05:07:16,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:07:16,854 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:16,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1246872481, now seen corresponding path program 2 times [2020-10-13 05:07:16,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:16,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211898509] [2020-10-13 05:07:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:16,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:17,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:17,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:17,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:17,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:18,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:18,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 05:07:18,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:07:18,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2013 [2020-10-13 05:07:18,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:18,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:07:18,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:07:18,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:19,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:19,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:19,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:19,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:19,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:19,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:19,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:19,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:19,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:19,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:19,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:19,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:19,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:19,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:19,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:19,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:19,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:19,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:19,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:19,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:19,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:19,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211898509] [2020-10-13 05:07:19,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:19,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:07:19,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700022666] [2020-10-13 05:07:19,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:07:19,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:07:19,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:07:19,407 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2020-10-13 05:07:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:20,472 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-13 05:07:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:07:20,474 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-13 05:07:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:20,475 INFO L225 Difference]: With dead ends: 46 [2020-10-13 05:07:20,475 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:07:20,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:07:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:07:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-13 05:07:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:07:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-13 05:07:20,489 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2020-10-13 05:07:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:20,490 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-13 05:07:20,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:07:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-13 05:07:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 05:07:20,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:20,493 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] [2020-10-13 05:07:20,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:07:20,494 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash -726852151, now seen corresponding path program 3 times [2020-10-13 05:07:20,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:20,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724842372] [2020-10-13 05:07:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:21,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:22,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:22,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:22,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:23,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 05:07:23,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:07:23,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2875 [2020-10-13 05:07:23,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:07:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:07:23,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:23,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:23,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:23,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:23,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:23,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:23,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:23,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:23,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:23,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:23,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:23,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:23,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:23,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:23,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724842372] [2020-10-13 05:07:23,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:23,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:07:23,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193394275] [2020-10-13 05:07:23,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:07:23,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:23,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:07:23,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:07:23,468 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 10 states. [2020-10-13 05:07:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:23,695 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2020-10-13 05:07:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:07:23,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-13 05:07:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:23,697 INFO L225 Difference]: With dead ends: 75 [2020-10-13 05:07:23,697 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 05:07:23,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:07:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 05:07:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2020-10-13 05:07:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:07:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 05:07:23,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 34 [2020-10-13 05:07:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:23,706 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 05:07:23,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:07:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 05:07:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:07:23,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:23,708 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-13 05:07:23,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:07:23,708 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:23,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1923985017, now seen corresponding path program 4 times [2020-10-13 05:07:23,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:23,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748292388] [2020-10-13 05:07:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:23,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:26,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:26,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:07:26,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:07:26,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2612 [2020-10-13 05:07:26,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:07:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:26,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:07:26,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:27,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:27,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:27,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:27,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:27,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:27,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:27,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:27,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:27,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:27,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:27,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:27,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:27,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:27,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:27,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:27,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:27,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:27,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:27,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:27,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:27,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:27,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:27,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748292388] [2020-10-13 05:07:27,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:27,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:07:27,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554662665] [2020-10-13 05:07:27,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:07:27,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:27,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:07:27,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:07:27,370 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 19 states. [2020-10-13 05:07:28,163 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-13 05:07:28,547 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-13 05:07:28,830 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2020-10-13 05:07:29,090 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-13 05:07:29,356 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-13 05:07:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:29,827 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 05:07:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:07:29,828 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-13 05:07:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:29,829 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:07:29,829 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 05:07:29,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:07:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 05:07:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-10-13 05:07:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:07:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 05:07:29,837 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-10-13 05:07:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:29,838 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 05:07:29,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:07:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 05:07:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:07:29,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:29,839 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 05:07:29,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:07:29,839 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:29,840 INFO L82 PathProgramCache]: Analyzing trace with hash -932931423, now seen corresponding path program 5 times [2020-10-13 05:07:29,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:29,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524087576] [2020-10-13 05:07:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:29,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:29,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:29,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:29,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:30,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:30,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:32,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:32,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:33,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:34,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:07:34,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:07:34,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:07:34,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:07:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:07:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:07:34,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:34,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:34,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:34,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:34,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:34,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:34,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:34,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:34,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:34,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:34,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:34,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:34,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:34,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:34,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:34,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:34,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:34,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:34,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 05:07:34,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524087576] [2020-10-13 05:07:34,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:34,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:07:34,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779530249] [2020-10-13 05:07:34,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:07:34,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:07:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:07:34,906 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-13 05:07:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:34,992 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-13 05:07:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:07:34,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-13 05:07:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:34,994 INFO L225 Difference]: With dead ends: 57 [2020-10-13 05:07:34,995 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:07:34,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:07:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:07:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 05:07:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:07:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 05:07:35,002 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 39 [2020-10-13 05:07:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:35,003 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 05:07:35,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:07:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 05:07:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:07:35,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:35,004 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:07:35,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:07:35,005 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash -231866845, now seen corresponding path program 6 times [2020-10-13 05:07:35,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:35,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122783108] [2020-10-13 05:07:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:35,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:37,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:07:39,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:07:39,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4563 [2020-10-13 05:07:39,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:07:39,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:39,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:07:39,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:39,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:39,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:39,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:39,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:39,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:39,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:39,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:39,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:39,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:39,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:39,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:39,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:39,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122783108] [2020-10-13 05:07:39,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:39,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:07:39,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40048041] [2020-10-13 05:07:39,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:07:39,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:39,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:07:39,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:07:39,688 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 12 states. [2020-10-13 05:07:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:39,929 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-13 05:07:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:07:39,930 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-13 05:07:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:39,931 INFO L225 Difference]: With dead ends: 65 [2020-10-13 05:07:39,932 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 05:07:39,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:07:39,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 05:07:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-13 05:07:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:07:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-13 05:07:39,940 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-13 05:07:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:39,940 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-13 05:07:39,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:07:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-13 05:07:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:07:39,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:39,941 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-13 05:07:39,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:07:39,942 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash 604598565, now seen corresponding path program 7 times [2020-10-13 05:07:39,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:39,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082535820] [2020-10-13 05:07:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:42,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:42,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:42,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:07:42,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:07:42,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2231 [2020-10-13 05:07:42,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:42,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:07:42,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:42,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:07:42,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:42,680 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-13 05:07:43,094 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-13 05:07:43,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:43,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:43,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:43,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:43,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:43,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:43,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:43,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:43,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:43,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:43,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:43,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:43,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:43,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:43,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:43,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:43,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:43,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082535820] [2020-10-13 05:07:43,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:43,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:07:43,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721133103] [2020-10-13 05:07:43,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:07:43,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:43,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:07:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:07:43,791 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-10-13 05:07:45,033 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2020-10-13 05:07:45,380 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-13 05:07:45,739 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 104 [2020-10-13 05:07:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:46,775 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-10-13 05:07:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:07:46,776 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-10-13 05:07:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:46,777 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:07:46,777 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 05:07:46,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:07:46,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 05:07:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 05:07:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 05:07:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 05:07:46,787 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2020-10-13 05:07:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:46,788 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 05:07:46,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:07:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 05:07:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:07:46,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:46,789 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:46,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:07:46,790 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:46,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:46,790 INFO L82 PathProgramCache]: Analyzing trace with hash -629780027, now seen corresponding path program 8 times [2020-10-13 05:07:46,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:46,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232259873] [2020-10-13 05:07:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:46,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:50,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:07:50,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:07:50,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4048 [2020-10-13 05:07:50,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:07:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:07:50,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:50,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:50,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:50,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:50,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:50,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:50,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:50,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:50,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:50,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:50,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:50,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:50,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:50,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:50,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232259873] [2020-10-13 05:07:50,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:50,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:07:50,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021475820] [2020-10-13 05:07:50,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:07:50,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:50,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:07:50,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:07:50,969 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 14 states. [2020-10-13 05:07:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:51,239 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-13 05:07:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:07:51,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-13 05:07:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:51,246 INFO L225 Difference]: With dead ends: 73 [2020-10-13 05:07:51,246 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 05:07:51,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:07:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 05:07:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-13 05:07:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 05:07:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-13 05:07:51,262 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-13 05:07:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:51,262 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-13 05:07:51,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:07:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-13 05:07:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:07:51,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:51,268 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:51,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:07:51,269 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:51,269 INFO L82 PathProgramCache]: Analyzing trace with hash -634097661, now seen corresponding path program 9 times [2020-10-13 05:07:51,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:51,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858692104] [2020-10-13 05:07:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:51,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:56,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:56,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:07:56,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:07:56,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 05:07:56,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:56,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:07:56,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:56,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:07:56,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:57,004 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 43 [2020-10-13 05:07:57,217 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 42 [2020-10-13 05:07:57,463 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 60 [2020-10-13 05:07:58,076 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 89 [2020-10-13 05:07:58,268 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 53 [2020-10-13 05:07:58,537 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 59 [2020-10-13 05:07:58,707 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-13 05:07:59,128 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 104 [2020-10-13 05:07:59,490 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 109 [2020-10-13 05:07:59,751 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 83 [2020-10-13 05:08:00,019 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 63 [2020-10-13 05:08:00,227 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 54 [2020-10-13 05:08:00,470 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 65 [2020-10-13 05:08:00,681 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-13 05:08:01,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:01,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:01,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:01,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:01,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:01,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:01,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:01,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:01,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:01,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:01,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:01,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:01,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:01,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:01,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:01,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:01,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:08:01,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858692104] [2020-10-13 05:08:01,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:01,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:08:01,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296480397] [2020-10-13 05:08:01,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:08:01,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:01,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:08:01,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:08:01,509 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 27 states. [2020-10-13 05:08:02,247 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 72 [2020-10-13 05:08:02,831 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-10-13 05:08:03,299 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2020-10-13 05:08:04,131 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2020-10-13 05:08:04,889 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 117 [2020-10-13 05:08:05,506 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-10-13 05:08:06,239 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 101 [2020-10-13 05:08:07,239 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 127 [2020-10-13 05:08:10,206 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 305 DAG size of output: 270 [2020-10-13 05:08:10,745 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 111 [2020-10-13 05:08:11,465 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 122 [2020-10-13 05:08:15,649 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 232 DAG size of output: 185 [2020-10-13 05:08:16,093 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-13 05:08:16,567 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 05:08:16,900 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 05:08:17,326 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2020-10-13 05:08:18,227 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 05:08:18,968 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-13 05:08:19,679 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-13 05:08:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:19,773 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-13 05:08:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:08:19,775 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2020-10-13 05:08:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:19,775 INFO L225 Difference]: With dead ends: 56 [2020-10-13 05:08:19,776 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 05:08:19,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=261, Invalid=2289, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:08:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 05:08:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 05:08:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 05:08:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-13 05:08:19,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2020-10-13 05:08:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:19,788 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-13 05:08:19,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:08:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-13 05:08:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:08:19,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:19,789 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:19,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:08:19,790 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:19,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:19,790 INFO L82 PathProgramCache]: Analyzing trace with hash -270041561, now seen corresponding path program 10 times [2020-10-13 05:08:19,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:19,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123976354] [2020-10-13 05:08:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:19,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:19,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:19,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:21,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:22,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:24,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:24,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:08:24,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:08:24,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:08:24,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:24,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:08:24,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:24,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:08:24,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:24,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:24,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:24,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:24,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:24,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:24,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:24,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:24,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:24,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:24,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:24,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:24,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:24,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:24,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:24,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:24,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:24,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:24,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:24,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:24,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:24,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:24,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123976354] [2020-10-13 05:08:24,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:24,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:08:24,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163682773] [2020-10-13 05:08:24,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:08:24,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:24,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:08:24,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:08:24,988 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 16 states. [2020-10-13 05:08:25,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:25,359 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-13 05:08:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:08:25,360 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-13 05:08:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:25,361 INFO L225 Difference]: With dead ends: 81 [2020-10-13 05:08:25,361 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 05:08:25,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:08:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 05:08:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-13 05:08:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:08:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 05:08:25,374 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-13 05:08:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:25,374 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 05:08:25,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:08:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 05:08:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:08:25,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:25,375 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:25,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:08:25,376 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:25,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:25,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1307011415, now seen corresponding path program 11 times [2020-10-13 05:08:25,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:25,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017591011] [2020-10-13 05:08:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:26,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:27,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:27,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:28,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:30,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:08:30,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:08:30,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5269 [2020-10-13 05:08:30,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:30,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:08:30,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:08:30,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:08:30,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:31,289 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2020-10-13 05:08:31,518 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2020-10-13 05:08:31,751 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2020-10-13 05:08:32,036 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 46 [2020-10-13 05:08:32,483 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 56 [2020-10-13 05:08:33,060 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 57 [2020-10-13 05:08:33,434 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 62 [2020-10-13 05:08:33,706 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 58 [2020-10-13 05:08:33,982 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2020-10-13 05:08:34,766 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 113 [2020-10-13 05:08:35,836 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-13 05:08:36,711 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 105 [2020-10-13 05:08:37,281 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 83 [2020-10-13 05:08:37,911 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 75 [2020-10-13 05:08:38,603 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 75 [2020-10-13 05:08:39,138 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 65 [2020-10-13 05:08:39,651 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 51 [2020-10-13 05:08:39,993 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2020-10-13 05:08:40,317 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2020-10-13 05:08:40,597 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2020-10-13 05:08:41,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:41,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:41,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:41,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:41,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:41,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:41,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:41,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:41,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:41,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:41,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:41,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:41,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:41,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:41,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:41,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:41,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:41,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:08:41,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017591011] [2020-10-13 05:08:41,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:41,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:08:41,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403427974] [2020-10-13 05:08:41,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:08:41,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:08:41,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:08:41,525 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 31 states. [2020-10-13 05:08:42,850 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 89 [2020-10-13 05:08:43,849 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 107 [2020-10-13 05:08:44,167 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-13 05:08:44,610 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 90 [2020-10-13 05:08:49,545 WARN L193 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-13 05:08:53,910 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 59 [2020-10-13 05:08:59,722 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 183 DAG size of output: 128 [2020-10-13 05:09:06,795 WARN L193 SmtUtils]: Spent 6.63 s on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-10-13 05:09:12,192 WARN L193 SmtUtils]: Spent 4.98 s on a formula simplification. DAG size of input: 202 DAG size of output: 116 [2020-10-13 05:09:21,560 WARN L193 SmtUtils]: Spent 9.09 s on a formula simplification. DAG size of input: 132 DAG size of output: 126 [2020-10-13 05:09:30,804 WARN L193 SmtUtils]: Spent 8.78 s on a formula simplification. DAG size of input: 455 DAG size of output: 431 [2020-10-13 05:09:34,525 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 169 DAG size of output: 124 [2020-10-13 05:09:38,138 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 180 DAG size of output: 135 [2020-10-13 05:09:42,864 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 237 DAG size of output: 182 [2020-10-13 05:09:43,901 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-13 05:09:45,358 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 190 DAG size of output: 188 [2020-10-13 05:09:46,653 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 132 [2020-10-13 05:09:47,857 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 124 [2020-10-13 05:09:48,806 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-13 05:09:54,335 WARN L193 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 361 DAG size of output: 342 [2020-10-13 05:09:54,752 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-13 05:10:00,029 WARN L193 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 363 DAG size of output: 344 [2020-10-13 05:10:05,838 WARN L193 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 354 DAG size of output: 338 [2020-10-13 05:10:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:06,057 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-13 05:10:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:10:06,059 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 51 [2020-10-13 05:10:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:06,060 INFO L225 Difference]: With dead ends: 61 [2020-10-13 05:10:06,060 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 05:10:06,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 90.9s TimeCoverageRelationStatistics Valid=327, Invalid=2862, Unknown=3, NotChecked=0, Total=3192 [2020-10-13 05:10:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 05:10:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 05:10:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:10:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 05:10:06,074 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2020-10-13 05:10:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:06,074 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 05:10:06,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:10:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 05:10:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:10:06,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:06,076 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:10:06,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:10:06,076 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:06,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1863650753, now seen corresponding path program 12 times [2020-10-13 05:10:06,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:06,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047957919] [2020-10-13 05:10:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:06,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:06,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:06,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:06,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:06,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:07,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:07,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:07,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:07,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:07,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:07,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:09,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:11,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:11,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:10:11,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:10:11,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 05:10:11,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:10:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:11,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:10:11,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:11,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:11,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:11,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:11,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:11,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:11,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:11,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:11,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:11,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:11,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:11,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:11,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:11,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:11,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:11,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:11,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:11,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 59 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:11,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047957919] [2020-10-13 05:10:11,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:11,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:10:11,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197438988] [2020-10-13 05:10:11,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:10:11,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:11,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:10:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:10:11,480 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 18 states. [2020-10-13 05:10:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:12,218 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-13 05:10:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:10:12,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-13 05:10:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:12,221 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:10:12,222 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 05:10:12,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:10:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 05:10:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-13 05:10:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 05:10:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-13 05:10:12,240 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-13 05:10:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:12,240 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-13 05:10:12,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:10:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-13 05:10:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:10:12,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:12,241 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:10:12,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:10:12,242 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:12,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:12,242 INFO L82 PathProgramCache]: Analyzing trace with hash 900265599, now seen corresponding path program 13 times [2020-10-13 05:10:12,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:12,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358166719] [2020-10-13 05:10:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:12,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:12,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:14,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:16,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:16,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:17,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:17,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:17,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 05:10:17,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:10:17,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:10:17,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:10:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:10:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:10:17,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:17,916 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-10-13 05:10:18,174 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-13 05:10:19,066 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 62 [2020-10-13 05:10:20,970 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 123 DAG size of output: 84 [2020-10-13 05:10:21,482 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 61 [2020-10-13 05:10:22,015 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 71 [2020-10-13 05:10:22,308 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 44 [2020-10-13 05:10:22,624 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2020-10-13 05:10:22,963 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2020-10-13 05:10:23,543 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 61 [2020-10-13 05:10:23,950 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2020-10-13 05:10:25,573 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 131 DAG size of output: 121 [2020-10-13 05:10:27,381 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 131 DAG size of output: 120 [2020-10-13 05:10:28,449 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 113 [2020-10-13 05:10:29,714 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2020-10-13 05:10:30,519 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-10-13 05:10:31,364 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-10-13 05:10:31,882 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-13 05:10:32,340 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-13 05:10:32,703 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-13 05:10:33,109 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2020-10-13 05:10:33,953 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-10-13 05:10:35,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:35,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:35,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:35,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:35,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:35,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:35,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:35,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:35,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:35,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:35,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:35,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:35,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:10:35,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:35,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:35,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:35,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:35,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 20 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:10:35,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358166719] [2020-10-13 05:10:35,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:35,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:10:35,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015106785] [2020-10-13 05:10:35,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:10:35,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:35,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:10:35,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:10:35,395 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 35 states. [2020-10-13 05:10:36,649 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-13 05:10:37,497 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2020-10-13 05:10:39,938 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-13 05:10:40,700 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 86 [2020-10-13 05:10:44,117 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-10-13 05:10:51,125 WARN L193 SmtUtils]: Spent 5.27 s on a formula simplification. DAG size of input: 169 DAG size of output: 123 [2020-10-13 05:10:52,281 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2020-10-13 05:10:59,202 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 209 DAG size of output: 154 [2020-10-13 05:11:01,412 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 119 DAG size of output: 107 [2020-10-13 05:11:11,109 WARN L193 SmtUtils]: Spent 5.50 s on a formula simplification. DAG size of input: 223 DAG size of output: 168 [2020-10-13 05:11:13,048 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 136 DAG size of output: 124 [2020-10-13 05:11:17,664 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 242 DAG size of output: 161 [2020-10-13 05:11:21,034 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 170 DAG size of output: 159