/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/res1o.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:07:31,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:07:31,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:07:31,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:07:31,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:07:31,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:07:31,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:07:31,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:07:31,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:07:31,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:07:31,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:07:31,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:07:31,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:07:31,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:07:31,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:07:31,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:07:31,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:07:31,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:07:31,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:07:31,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:07:31,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:07:31,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:07:31,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:07:31,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:07:31,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:07:31,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:07:31,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:07:31,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:07:31,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:07:31,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:07:31,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:07:31,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:07:31,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:07:31,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:07:31,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:07:31,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:07:31,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:07:31,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:07:31,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:07:31,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:07:31,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:07:31,093 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 05:07:31,116 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:07:31,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:07:31,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:07:31,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:07:31,118 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:07:31,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:07:31,118 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:07:31,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:07:31,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:07:31,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:07:31,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:07:31,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:07:31,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:07:31,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:07:31,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:07:31,120 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:07:31,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:07:31,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:07:31,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:07:31,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:07:31,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:07:31,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:07:31,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:07:31,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:07:31,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:07:31,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:07:31,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:07:31,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:07:31,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:07:31,123 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 05:07:31,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:07:31,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:07:31,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:07:31,457 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:07:31,457 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:07:31,458 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1o.c [2020-10-13 05:07:31,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c4cb9707/b7492a4f2dc244f3ab70e47ba35f0d92/FLAGe23c8e8eb [2020-10-13 05:07:31,984 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:07:31,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1o.c [2020-10-13 05:07:31,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c4cb9707/b7492a4f2dc244f3ab70e47ba35f0d92/FLAGe23c8e8eb [2020-10-13 05:07:32,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c4cb9707/b7492a4f2dc244f3ab70e47ba35f0d92 [2020-10-13 05:07:32,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:07:32,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:07:32,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:32,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:07:32,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:07:32,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:32" (1/1) ... [2020-10-13 05:07:32,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a9d4506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32, skipping insertion in model container [2020-10-13 05:07:32,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:32" (1/1) ... [2020-10-13 05:07:32,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:07:32,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:07:32,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:32,661 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:07:32,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:32,702 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:07:32,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32 WrapperNode [2020-10-13 05:07:32,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:32,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:07:32,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:07:32,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:07:32,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32" (1/1) ... [2020-10-13 05:07:32,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32" (1/1) ... [2020-10-13 05:07:32,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32" (1/1) ... [2020-10-13 05:07:32,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32" (1/1) ... [2020-10-13 05:07:32,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32" (1/1) ... [2020-10-13 05:07:32,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32" (1/1) ... [2020-10-13 05:07:32,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32" (1/1) ... [2020-10-13 05:07:32,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:07:32,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:07:32,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:07:32,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:07:32,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32" (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 05:07:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:07:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:07:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:07:32,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:07:32,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:07:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:07:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:07:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:07:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:07:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:07:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:07:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:07:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:07:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:07:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:07:32,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:07:32,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:07:32,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:07:32,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:07:33,184 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:07:33,184 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 05:07:33,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:33 BoogieIcfgContainer [2020-10-13 05:07:33,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:07:33,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:07:33,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:07:33,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:07:33,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:07:32" (1/3) ... [2020-10-13 05:07:33,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df15b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:33, skipping insertion in model container [2020-10-13 05:07:33,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:32" (2/3) ... [2020-10-13 05:07:33,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df15b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:33, skipping insertion in model container [2020-10-13 05:07:33,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:33" (3/3) ... [2020-10-13 05:07:33,200 INFO L109 eAbstractionObserver]: Analyzing ICFG res1o.c [2020-10-13 05:07:33,220 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:07:33,243 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:07:33,277 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:07:33,321 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:07:33,321 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:07:33,321 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:07:33,321 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:07:33,321 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:07:33,321 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:07:33,322 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:07:33,322 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:07:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-13 05:07:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:07:33,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:33,348 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] [2020-10-13 05:07:33,348 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:33,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:33,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1562148239, now seen corresponding path program 1 times [2020-10-13 05:07:33,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:33,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633352156] [2020-10-13 05:07:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:33,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:33,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:33,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:33,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:33,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:34,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:07:34,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:07:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-13 05:07:34,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:34,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:07:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:34,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 05:07:34,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:34,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:34,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:34,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:34,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:34,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:34,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:34,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:34,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:34,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:34,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:34,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:34,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:34,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:07:34,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:34,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:34,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:34,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:07:34,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:34,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:34,676 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 05:07:34,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633352156] [2020-10-13 05:07:34,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:34,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:07:34,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019331260] [2020-10-13 05:07:34,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:07:34,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:07:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:07:34,713 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-13 05:07:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:34,829 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-10-13 05:07:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:07:34,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-13 05:07:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:34,841 INFO L225 Difference]: With dead ends: 64 [2020-10-13 05:07:34,841 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 05:07:34,845 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 05:07:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 05:07:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 05:07:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:07:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-13 05:07:34,895 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-10-13 05:07:34,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:34,895 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-13 05:07:34,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:07:34,896 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-13 05:07:34,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:07:34,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:34,897 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] [2020-10-13 05:07:34,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:07:34,898 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash 369304979, now seen corresponding path program 1 times [2020-10-13 05:07:34,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:34,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436197703] [2020-10-13 05:07:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:35,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:07:35,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:07:35,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-13 05:07:35,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:07:35,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:07:35,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:07:35,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 05:07:35,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:35,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:35,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:35,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:35,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:35,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:35,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:35,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:35,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:35,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:35,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:35,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:35,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:35,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:07:35,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:07:35,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:35,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:07:35,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:35,746 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 05:07:35,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436197703] [2020-10-13 05:07:35,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:35,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:07:35,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596681787] [2020-10-13 05:07:35,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:07:35,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:35,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:07:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:07:35,751 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-10-13 05:07:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:35,880 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-13 05:07:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:07:35,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-13 05:07:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:35,882 INFO L225 Difference]: With dead ends: 53 [2020-10-13 05:07:35,883 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:07:35,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:07:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:07:35,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-13 05:07:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 05:07:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 05:07:35,893 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-10-13 05:07:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:35,893 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 05:07:35,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:07:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 05:07:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:07:35,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:35,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:35,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:07:35,896 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1815337701, now seen corresponding path program 1 times [2020-10-13 05:07:35,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:35,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821000728] [2020-10-13 05:07:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:35,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:36,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:36,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:36,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:36,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:37,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:37,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:37,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:37,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:38,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:07:38,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:07:38,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2981 [2020-10-13 05:07:38,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:07:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:07:38,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:39,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:39,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:39,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:39,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:39,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:39,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:39,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:39,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:39,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:39,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:39,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:39,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821000728] [2020-10-13 05:07:39,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:39,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:07:39,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477717178] [2020-10-13 05:07:39,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:07:39,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:39,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:07:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:07:39,403 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 17 states. [2020-10-13 05:07:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:40,164 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-13 05:07:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:07:40,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-13 05:07:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:40,166 INFO L225 Difference]: With dead ends: 55 [2020-10-13 05:07:40,166 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 05:07:40,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:07:40,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 05:07:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-13 05:07:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 05:07:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-13 05:07:40,178 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 33 [2020-10-13 05:07:40,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:40,178 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-13 05:07:40,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:07:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-13 05:07:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:07:40,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:40,180 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, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:40,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:07:40,180 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:40,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1714093027, now seen corresponding path program 2 times [2020-10-13 05:07:40,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:40,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156513431] [2020-10-13 05:07:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:40,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:42,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:42,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:07:42,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:07:42,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2382 [2020-10-13 05:07:42,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:42,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:07:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:07:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:07:42,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:42,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:42,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:42,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:42,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:42,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:42,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:42,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:42,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:42,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:42,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:42,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:42,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:42,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:42,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:42,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:42,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:42,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:42,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:42,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:42,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:42,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:07:42,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156513431] [2020-10-13 05:07:42,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:42,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:07:42,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033007856] [2020-10-13 05:07:42,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:07:42,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:42,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:07:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:07:42,680 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 8 states. [2020-10-13 05:07:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:42,935 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2020-10-13 05:07:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:07:42,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 05:07:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:42,937 INFO L225 Difference]: With dead ends: 93 [2020-10-13 05:07:42,937 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 05:07:42,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:07:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 05:07:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2020-10-13 05:07:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 05:07:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-13 05:07:42,947 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-10-13 05:07:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:42,947 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-13 05:07:42,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:07:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-13 05:07:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:07:42,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:42,949 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, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:42,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:07:42,949 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:42,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1542892381, now seen corresponding path program 3 times [2020-10-13 05:07:42,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:42,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891110954] [2020-10-13 05:07:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:42,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:42,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:44,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:44,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:46,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:46,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:47,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:07:47,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:07:47,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:07:47,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:47,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:07:47,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:47,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:07:47,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:48,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:48,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:48,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:48,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:48,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:48,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:48,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:48,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:48,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:48,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:48,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:48,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:48,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:48,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:48,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:48,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:48,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:07:48,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891110954] [2020-10-13 05:07:48,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:48,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:07:48,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118884997] [2020-10-13 05:07:48,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:07:48,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:07:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:07:48,039 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-10-13 05:07:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:48,282 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-13 05:07:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:07:48,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 05:07:48,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:48,283 INFO L225 Difference]: With dead ends: 56 [2020-10-13 05:07:48,284 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 05:07:48,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:07:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 05:07:48,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 05:07:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:07:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 05:07:48,291 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2020-10-13 05:07:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:48,291 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 05:07:48,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:07:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 05:07:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:07:48,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:48,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:48,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:07:48,293 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1006388061, now seen corresponding path program 4 times [2020-10-13 05:07:48,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:48,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873860428] [2020-10-13 05:07:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:48,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:53,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:07:53,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 05:07:53,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-13 05:07:53,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:07:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:07:53,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:53,751 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-13 05:07:53,888 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-13 05:07:55,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:55,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:55,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:55,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:55,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:55,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:55,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:55,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:55,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:55,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:55,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:55,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:55,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:55,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:55,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:55,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:55,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:55,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:55,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873860428] [2020-10-13 05:07:55,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:55,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:07:55,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63712067] [2020-10-13 05:07:55,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:07:55,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:55,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:07:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:07:55,343 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 25 states. [2020-10-13 05:07:56,431 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-13 05:07:56,584 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-10-13 05:07:57,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:57,905 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-10-13 05:07:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:07:57,905 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-10-13 05:07:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:57,906 INFO L225 Difference]: With dead ends: 72 [2020-10-13 05:07:57,907 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:07:57,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:07:57,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:07:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2020-10-13 05:07:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 05:07:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-13 05:07:57,919 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 41 [2020-10-13 05:07:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:57,920 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-13 05:07:57,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:07:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-13 05:07:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:07:57,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:57,921 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:57,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:07:57,922 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:57,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1702569563, now seen corresponding path program 5 times [2020-10-13 05:07:57,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:57,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049863402] [2020-10-13 05:07:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:57,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:02,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:08:02,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:08:02,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4874 [2020-10-13 05:08:02,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:08:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:08:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:08:02,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:02,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:02,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:02,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:02,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:02,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:02,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:02,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:02,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:02,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:02,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:02,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:02,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:02,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:02,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:08:02,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049863402] [2020-10-13 05:08:02,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:02,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:08:02,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548533253] [2020-10-13 05:08:02,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:08:02,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:08:02,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:08:02,894 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 10 states. [2020-10-13 05:08:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:03,206 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2020-10-13 05:08:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:08:03,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-13 05:08:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:03,208 INFO L225 Difference]: With dead ends: 109 [2020-10-13 05:08:03,208 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:08:03,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:08:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:08:03,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-13 05:08:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:08:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-13 05:08:03,232 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2020-10-13 05:08:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:03,232 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-13 05:08:03,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:08:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-13 05:08:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:08:03,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:03,240 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:03,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:08:03,241 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:03,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1254787865, now seen corresponding path program 6 times [2020-10-13 05:08:03,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:03,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759413438] [2020-10-13 05:08:03,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:04,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:05,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:05,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:05,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:08,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:08:08,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:08:08,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:08:08,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:08,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:08:08,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:08:08,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:08:08,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:08,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:08,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:08,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:08,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:08,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:08,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:08,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:08,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:08,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:08,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:08,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:08,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:08,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:08,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:08,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:08,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:08,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:08,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:08,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 05:08:08,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759413438] [2020-10-13 05:08:08,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:08,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:08:08,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390104861] [2020-10-13 05:08:08,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:08:08,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:08,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:08:08,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:08:08,370 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 10 states. [2020-10-13 05:08:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:08,664 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-10-13 05:08:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:08:08,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-13 05:08:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:08,666 INFO L225 Difference]: With dead ends: 62 [2020-10-13 05:08:08,666 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 05:08:08,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:08:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 05:08:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 05:08:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 05:08:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-13 05:08:08,675 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2020-10-13 05:08:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:08,675 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-13 05:08:08,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:08:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-13 05:08:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:08:08,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:08,676 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1] [2020-10-13 05:08:08,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:08:08,677 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:08,677 INFO L82 PathProgramCache]: Analyzing trace with hash -683545557, now seen corresponding path program 7 times [2020-10-13 05:08:08,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:08,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700505204] [2020-10-13 05:08:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:08,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:09,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:13,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:08:13,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:08:13,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-13 05:08:13,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:08:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:08:13,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:14,741 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-13 05:08:16,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:16,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:16,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:16,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:16,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:16,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:16,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:16,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:16,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:16,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:16,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:16,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:16,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:16,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:16,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:16,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700505204] [2020-10-13 05:08:16,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:16,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:08:16,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743508917] [2020-10-13 05:08:16,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:08:16,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:16,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:08:16,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:08:16,451 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 33 states. [2020-10-13 05:08:17,507 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-13 05:08:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:20,140 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-13 05:08:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:08:20,141 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 49 [2020-10-13 05:08:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:20,142 INFO L225 Difference]: With dead ends: 87 [2020-10-13 05:08:20,142 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:08:20,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=335, Invalid=3325, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 05:08:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:08:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-13 05:08:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:08:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-13 05:08:20,162 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 49 [2020-10-13 05:08:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:20,162 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-13 05:08:20,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:08:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-13 05:08:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:08:20,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:20,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1] [2020-10-13 05:08:20,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:08:20,164 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash -688568531, now seen corresponding path program 8 times [2020-10-13 05:08:20,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:20,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952651487] [2020-10-13 05:08:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:20,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:08:25,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:08:25,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:08:25,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:08:25,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:08:25,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:08:25,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:25,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:25,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:25,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:25,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:25,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:25,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:25,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:25,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:25,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:25,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:25,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:25,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:08:25,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952651487] [2020-10-13 05:08:25,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:25,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:08:25,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083368076] [2020-10-13 05:08:25,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:08:25,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:25,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:08:25,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:08:25,282 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 12 states. [2020-10-13 05:08:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:25,657 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2020-10-13 05:08:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:08:25,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 05:08:25,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:25,659 INFO L225 Difference]: With dead ends: 137 [2020-10-13 05:08:25,659 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 05:08:25,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 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 05:08:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 05:08:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-10-13 05:08:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 05:08:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-13 05:08:25,670 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 51 [2020-10-13 05:08:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:25,670 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-13 05:08:25,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:08:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-13 05:08:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:08:25,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:25,675 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1] [2020-10-13 05:08:25,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:08:25,675 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:25,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1049907603, now seen corresponding path program 9 times [2020-10-13 05:08:25,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:25,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243553242] [2020-10-13 05:08:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:28,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:30,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:08:30,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:08:30,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:08:30,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:30,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:08:30,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:30,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:08:30,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:30,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:30,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:30,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:30,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:30,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:30,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:30,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:30,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:30,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:30,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:30,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:30,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:30,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:30,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:08:30,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243553242] [2020-10-13 05:08:30,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:30,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:08:30,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108329393] [2020-10-13 05:08:30,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:08:30,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:30,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:08:30,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:08:30,802 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 12 states. [2020-10-13 05:08:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:31,263 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-10-13 05:08:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:08:31,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 05:08:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:31,265 INFO L225 Difference]: With dead ends: 80 [2020-10-13 05:08:31,265 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 05:08:31,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:08:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 05:08:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 05:08:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:08:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 05:08:31,275 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2020-10-13 05:08:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:31,276 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 05:08:31,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:08:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 05:08:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:08:31,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:31,278 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1] [2020-10-13 05:08:31,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:08:31,278 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:31,278 INFO L82 PathProgramCache]: Analyzing trace with hash 874427315, now seen corresponding path program 10 times [2020-10-13 05:08:31,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:31,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9017130] [2020-10-13 05:08:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:31,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:31,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:32,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:32,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:33,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:33,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:34,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:36,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:36,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:08:36,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:08:36,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 05:08:36,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:08:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:08:36,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:37,320 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-13 05:08:37,486 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-13 05:08:40,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:40,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:40,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:40,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:40,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:40,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:40,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:40,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:40,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:40,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:40,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:40,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:40,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:40,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:40,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9017130] [2020-10-13 05:08:40,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:40,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:08:40,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916356627] [2020-10-13 05:08:40,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:08:40,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:40,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:08:40,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:08:40,168 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 42 states. [2020-10-13 05:08:42,002 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 76 [2020-10-13 05:08:42,246 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 05:08:42,627 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-10-13 05:08:43,168 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 110 [2020-10-13 05:08:43,567 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-13 05:08:43,900 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2020-10-13 05:08:44,165 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-13 05:08:44,552 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-13 05:08:44,745 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-13 05:08:45,285 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-10-13 05:08:45,587 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-10-13 05:08:45,770 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-13 05:08:45,974 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2020-10-13 05:08:46,211 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2020-10-13 05:08:46,744 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-10-13 05:08:47,035 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-10-13 05:08:47,323 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-10-13 05:08:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:47,944 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-10-13 05:08:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 05:08:47,945 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 57 [2020-10-13 05:08:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:47,947 INFO L225 Difference]: With dead ends: 101 [2020-10-13 05:08:47,947 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 05:08:47,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=612, Invalid=5088, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 05:08:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 05:08:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-10-13 05:08:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:08:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-13 05:08:47,961 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 57 [2020-10-13 05:08:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:47,961 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-13 05:08:47,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:08:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-13 05:08:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:08:47,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:47,963 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1, 1] [2020-10-13 05:08:47,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:08:47,963 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1874742453, now seen corresponding path program 11 times [2020-10-13 05:08:47,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:47,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601369464] [2020-10-13 05:08:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:47,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:52,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:52,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:08:52,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:08:52,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:08:52,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:52,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:08:52,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 05:08:52,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:08:52,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:53,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:53,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:53,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:53,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:53,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:53,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:53,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:53,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:53,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:53,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:53,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:53,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:53,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:53,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:53,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:53,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:53,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:53,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 05:08:53,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601369464] [2020-10-13 05:08:53,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:53,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:08:53,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866821667] [2020-10-13 05:08:53,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:08:53,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:53,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:08:53,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:08:53,125 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 14 states. [2020-10-13 05:08:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:53,600 INFO L93 Difference]: Finished difference Result 159 states and 172 transitions. [2020-10-13 05:08:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:08:53,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 05:08:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:53,602 INFO L225 Difference]: With dead ends: 159 [2020-10-13 05:08:53,602 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 05:08:53,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 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 05:08:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 05:08:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-13 05:08:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 05:08:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-13 05:08:53,618 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 59 [2020-10-13 05:08:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:53,618 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-13 05:08:53,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:08:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-13 05:08:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:08:53,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:53,619 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1, 1] [2020-10-13 05:08:53,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:08:53,620 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash -83160075, now seen corresponding path program 12 times [2020-10-13 05:08:53,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:53,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832247560] [2020-10-13 05:08:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:53,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:54,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:55,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:56,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:58,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:58,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:58,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:08:58,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:08:58,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:08:58,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:58,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:08:58,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:08:58,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:58,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:58,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:58,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:58,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:58,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:58,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:58,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:58,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:58,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:58,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:58,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:58,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:58,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:58,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:58,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:58,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 05:08:58,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832247560] [2020-10-13 05:08:58,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:58,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:08:58,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330983450] [2020-10-13 05:08:58,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:08:58,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:58,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:08:58,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:08:58,822 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 14 states. [2020-10-13 05:08:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:59,607 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-10-13 05:08:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:08:59,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 05:08:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:59,609 INFO L225 Difference]: With dead ends: 92 [2020-10-13 05:08:59,609 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:08:59,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:08:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:08:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 05:08:59,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:08:59,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-13 05:08:59,624 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2020-10-13 05:08:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:59,624 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-13 05:08:59,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:08:59,625 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-13 05:08:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:08:59,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:59,627 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1, 1, 1] [2020-10-13 05:08:59,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:08:59,628 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1999770427, now seen corresponding path program 13 times [2020-10-13 05:08:59,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:59,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584774652] [2020-10-13 05:08:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:59,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:01,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:04,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:04,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:04,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:09:04,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:09:04,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:09:04,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:04,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:09:04,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:04,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:09:04,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:05,329 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-13 05:09:05,464 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-13 05:09:05,624 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-13 05:09:05,777 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-13 05:09:05,959 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-13 05:09:06,223 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-13 05:09:06,498 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-13 05:09:06,806 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-13 05:09:10,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:10,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:10,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:10,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:10,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:10,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:10,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:10,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:10,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:10,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:10,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:10,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:10,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:10,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:10,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:10,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:10,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:10,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:10,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:10,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584774652] [2020-10-13 05:09:10,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:10,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 05:09:10,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700280833] [2020-10-13 05:09:10,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 05:09:10,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:10,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 05:09:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1924, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:09:10,381 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 46 states. [2020-10-13 05:09:12,002 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-13 05:09:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:15,915 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2020-10-13 05:09:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 05:09:15,918 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 65 [2020-10-13 05:09:15,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:15,919 INFO L225 Difference]: With dead ends: 100 [2020-10-13 05:09:15,919 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 05:09:15,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=333, Invalid=5069, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 05:09:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 05:09:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2020-10-13 05:09:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:09:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-13 05:09:15,934 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 65 [2020-10-13 05:09:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:15,935 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-13 05:09:15,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 05:09:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-13 05:09:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:09:15,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:15,936 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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, 1, 1, 1] [2020-10-13 05:09:15,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:09:15,936 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:15,937 INFO L82 PathProgramCache]: Analyzing trace with hash 997714493, now seen corresponding path program 14 times [2020-10-13 05:09:15,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:15,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459772468] [2020-10-13 05:09:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:15,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:15,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:16,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:20,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:20,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:09:20,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:09:20,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:09:20,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:20,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:09:20,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 05:09:20,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:09:20,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:21,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:21,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:21,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:21,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:21,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:21,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:09:21,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:21,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:21,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:21,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:21,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:21,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:21,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:21,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:21,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:21,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:21,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:09:21,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:21,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:21,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:21,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:21,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 05:09:21,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459772468] [2020-10-13 05:09:21,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:21,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:09:21,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327959318] [2020-10-13 05:09:21,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:09:21,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:21,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:09:21,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:09:21,223 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 16 states. [2020-10-13 05:09:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:21,933 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2020-10-13 05:09:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:09:21,934 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-13 05:09:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:21,935 INFO L225 Difference]: With dead ends: 169 [2020-10-13 05:09:21,935 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 05:09:21,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:09:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 05:09:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-13 05:09:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 05:09:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-13 05:09:21,948 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 67 [2020-10-13 05:09:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:21,950 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-13 05:09:21,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:09:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-13 05:09:21,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:09:21,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:21,951 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 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, 1, 1, 1] [2020-10-13 05:09:21,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:09:21,952 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:21,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1357942913, now seen corresponding path program 15 times [2020-10-13 05:09:21,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:21,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111204342] [2020-10-13 05:09:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:21,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:22,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:22,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:26,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:26,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:26,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:09:26,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:09:26,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:09:26,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:09:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:09:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:09:26,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:27,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:27,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:27,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:27,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:27,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:27,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 05:09:27,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:27,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:27,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:27,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:27,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:27,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:27,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:27,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:27,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:27,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:27,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:27,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:27,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:27,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:27,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:27,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-13 05:09:27,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111204342] [2020-10-13 05:09:27,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:27,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:09:27,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802347411] [2020-10-13 05:09:27,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:09:27,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:09:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:09:27,223 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 16 states. [2020-10-13 05:09:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:28,097 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-10-13 05:09:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:09:28,098 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-13 05:09:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:28,099 INFO L225 Difference]: With dead ends: 92 [2020-10-13 05:09:28,099 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:09:28,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:09:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:09:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-13 05:09:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 05:09:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-13 05:09:28,111 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 69 [2020-10-13 05:09:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:28,112 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-13 05:09:28,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:09:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-13 05:09:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 05:09:28,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:28,113 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 1, 1, 1] [2020-10-13 05:09:28,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:09:28,114 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:28,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1930693315, now seen corresponding path program 16 times [2020-10-13 05:09:28,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:28,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794680548] [2020-10-13 05:09:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:28,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:30,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:33,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:33,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:09:33,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:09:33,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5356 [2020-10-13 05:09:33,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 05:09:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:33,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:09:33,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:34,220 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2020-10-13 05:09:34,587 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-13 05:09:34,728 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-13 05:09:34,915 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-13 05:09:35,085 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-13 05:09:35,289 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-13 05:09:35,474 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2020-10-13 05:09:35,679 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-13 05:09:35,904 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-13 05:09:36,126 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-13 05:09:36,570 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 69 [2020-10-13 05:09:36,895 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 58 [2020-10-13 05:09:37,204 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 54 [2020-10-13 05:09:37,482 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2020-10-13 05:09:37,792 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2020-10-13 05:09:38,113 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-13 05:09:38,423 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-13 05:09:38,718 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-13 05:09:39,022 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2020-10-13 05:09:39,290 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 05:09:39,619 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-13 05:09:39,889 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-10-13 05:09:40,148 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-10-13 05:09:40,416 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 25 [2020-10-13 05:09:40,693 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2020-10-13 05:09:40,942 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2020-10-13 05:09:41,195 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-13 05:09:41,608 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2020-10-13 05:09:41,933 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2020-10-13 05:09:42,297 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-13 05:09:42,714 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-13 05:09:43,093 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-13 05:09:43,471 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-13 05:09:43,883 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-13 05:09:44,335 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2020-10-13 05:09:44,739 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-13 05:09:44,999 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-13 05:09:45,283 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-13 05:09:45,607 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-13 05:09:45,933 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-13 05:09:46,250 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-13 05:09:46,497 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-13 05:09:46,738 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-13 05:09:47,043 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-13 05:09:47,578 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-13 05:09:48,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:48,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:48,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:48,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:48,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:48,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:48,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:48,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:48,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:48,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:48,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:48,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:48,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:48,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:48,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:48,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:48,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:48,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:48,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:48,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:48,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:48,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 20 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:48,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794680548] [2020-10-13 05:09:48,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:48,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 05:09:48,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607665659] [2020-10-13 05:09:48,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 05:09:48,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 05:09:48,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:09:48,622 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 58 states. [2020-10-13 05:09:50,102 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 40 [2020-10-13 05:09:50,379 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 43 [2020-10-13 05:09:50,707 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 52 [2020-10-13 05:09:51,015 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-13 05:09:51,355 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 52 [2020-10-13 05:09:51,757 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2020-10-13 05:09:52,299 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-13 05:09:52,668 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-13 05:09:52,966 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-13 05:09:53,829 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 114 [2020-10-13 05:09:54,289 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 63 [2020-10-13 05:09:54,650 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2020-10-13 05:09:54,923 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-10-13 05:09:55,240 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 55 [2020-10-13 05:09:55,530 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-10-13 05:09:55,845 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 55 [2020-10-13 05:09:56,119 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2020-10-13 05:09:56,431 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-10-13 05:09:56,723 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2020-10-13 05:09:57,012 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-10-13 05:09:57,308 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2020-10-13 05:09:58,196 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 75 [2020-10-13 05:09:58,514 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 05:09:59,461 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 91 [2020-10-13 05:10:00,269 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2020-10-13 05:10:01,110 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 92 [2020-10-13 05:10:01,713 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2020-10-13 05:10:02,523 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 84 [2020-10-13 05:10:03,081 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 77 [2020-10-13 05:10:03,657 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 82 [2020-10-13 05:10:04,248 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 75 [2020-10-13 05:10:04,757 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 81 [2020-10-13 05:10:05,115 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 50 [2020-10-13 05:10:05,468 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 49 [2020-10-13 05:10:05,849 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 55 [2020-10-13 05:10:06,499 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2020-10-13 05:10:07,494 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 100 [2020-10-13 05:10:07,890 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-13 05:10:09,084 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-13 05:10:09,684 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-13 05:10:10,300 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-10-13 05:10:10,857 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2020-10-13 05:10:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:11,259 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2020-10-13 05:10:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 05:10:11,260 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 73 [2020-10-13 05:10:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:11,261 INFO L225 Difference]: With dead ends: 111 [2020-10-13 05:10:11,262 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 05:10:11,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=1081, Invalid=11129, Unknown=0, NotChecked=0, Total=12210 [2020-10-13 05:10:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 05:10:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 05:10:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:10:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 05:10:11,279 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 73 [2020-10-13 05:10:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:11,279 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 05:10:11,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 05:10:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 05:10:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:10:11,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:11,281 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1, 1, 1] [2020-10-13 05:10:11,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:10:11,281 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:11,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:11,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1353818299, now seen corresponding path program 17 times [2020-10-13 05:10:11,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:11,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550277391] [2020-10-13 05:10:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:11,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:11,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:15,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:16,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:16,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:10:16,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:10:16,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 05:10:16,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:16,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:10:16,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:16,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:10:16,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:16,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:16,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:16,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:16,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:16,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:16,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:16,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:16,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:16,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:16,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:16,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:16,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:16,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:16,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:16,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:16,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:16,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:10:16,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:16,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 05:10:16,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550277391] [2020-10-13 05:10:16,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:16,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:10:16,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088142787] [2020-10-13 05:10:16,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:10:16,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:10:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:10:16,597 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 18 states. [2020-10-13 05:10:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:17,237 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2020-10-13 05:10:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:10:17,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-13 05:10:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:17,239 INFO L225 Difference]: With dead ends: 156 [2020-10-13 05:10:17,239 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 05:10:17,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:10:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 05:10:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2020-10-13 05:10:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 05:10:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-13 05:10:17,249 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 75 [2020-10-13 05:10:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:17,250 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-13 05:10:17,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:10:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-13 05:10:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:10:17,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:17,251 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 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, 1, 1, 1] [2020-10-13 05:10:17,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:10:17,251 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:17,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:17,251 INFO L82 PathProgramCache]: Analyzing trace with hash -36703481, now seen corresponding path program 18 times [2020-10-13 05:10:17,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:17,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755248666] [2020-10-13 05:10:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:17,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:17,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:21,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:21,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:21,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:22,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:22,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 05:10:22,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:10:22,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5713 [2020-10-13 05:10:22,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:10:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:10:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:10:22,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:23,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:23,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:23,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:23,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:23,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:23,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:23,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:23,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:23,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:23,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:23,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:23,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:23,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:23,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:23,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:23,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:23,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:10:23,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:23,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:23,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:23,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:23,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-13 05:10:23,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755248666] [2020-10-13 05:10:23,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:23,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:10:23,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041315221] [2020-10-13 05:10:23,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:10:23,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:10:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:10:23,244 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 18 states. [2020-10-13 05:10:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:24,247 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-10-13 05:10:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:10:24,248 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-10-13 05:10:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:24,249 INFO L225 Difference]: With dead ends: 102 [2020-10-13 05:10:24,249 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 05:10:24,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:10:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 05:10:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 05:10:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:10:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 05:10:24,259 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 77 [2020-10-13 05:10:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:24,259 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 05:10:24,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:10:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 05:10:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:10:24,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:24,260 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 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 05:10:24,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:10:24,261 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:24,261 INFO L82 PathProgramCache]: Analyzing trace with hash 811375179, now seen corresponding path program 19 times [2020-10-13 05:10:24,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:24,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731223772] [2020-10-13 05:10:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:24,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:27,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:29,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:29,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:10:29,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:10:29,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-13 05:10:29,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:29,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 05:10:29,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:29,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 05:10:29,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:30,143 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-13 05:10:30,397 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-13 05:10:30,546 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-13 05:10:30,710 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-13 05:10:31,341 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-13 05:10:31,654 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-13 05:10:31,933 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-13 05:10:32,164 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-13 05:10:32,495 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-13 05:10:32,818 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-13 05:10:33,150 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-10-13 05:10:33,401 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-13 05:10:33,735 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 05:10:34,012 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-13 05:10:34,317 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-13 05:10:34,529 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-13 05:10:34,830 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-13 05:10:35,409 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-13 05:10:36,514 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-13 05:10:36,745 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-13 05:10:37,016 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-13 05:10:37,273 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-13 05:10:37,591 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-13 05:10:37,910 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-13 05:10:38,245 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-13 05:10:38,557 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-13 05:10:38,914 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-13 05:10:39,249 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-13 05:10:39,756 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-13 05:10:40,069 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-13 05:10:40,416 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-13 05:10:40,707 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-13 05:10:41,053 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-13 05:10:41,318 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-13 05:10:41,690 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-13 05:10:41,984 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-13 05:10:42,339 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-13 05:10:42,910 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-13 05:10:43,993 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2020-10-13 05:10:44,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:44,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:44,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:44,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:44,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:44,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:44,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:44,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:44,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:44,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:44,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:44,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:44,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:44,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:44,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:45,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731223772] [2020-10-13 05:10:45,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:45,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 05:10:45,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538041014] [2020-10-13 05:10:45,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 05:10:45,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:45,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 05:10:45,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3701, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 05:10:45,005 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 64 states. [2020-10-13 05:10:45,943 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-13 05:10:46,525 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-13 05:10:46,905 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-10-13 05:10:47,254 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-13 05:10:47,682 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 46 [2020-10-13 05:10:48,088 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-13 05:10:48,544 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2020-10-13 05:10:49,088 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2020-10-13 05:10:49,983 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 70 [2020-10-13 05:10:50,753 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2020-10-13 05:10:51,329 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2020-10-13 05:10:53,400 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 181 DAG size of output: 112 [2020-10-13 05:10:54,270 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 61 [2020-10-13 05:10:54,890 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-13 05:10:55,246 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-13 05:10:56,289 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-13 05:10:56,586 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-13 05:10:57,208 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-10-13 05:10:59,354 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-13 05:11:00,263 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2020-10-13 05:11:00,977 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-13 05:11:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:03,054 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-10-13 05:11:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 05:11:03,056 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 81 [2020-10-13 05:11:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:03,057 INFO L225 Difference]: With dead ends: 124 [2020-10-13 05:11:03,057 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 05:11:03,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=699, Invalid=7311, Unknown=0, NotChecked=0, Total=8010 [2020-10-13 05:11:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 05:11:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2020-10-13 05:11:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 05:11:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-10-13 05:11:03,072 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 81 [2020-10-13 05:11:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:03,072 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-10-13 05:11:03,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 05:11:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-10-13 05:11:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 05:11:03,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:03,073 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 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 05:11:03,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:11:03,074 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:03,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1411181901, now seen corresponding path program 20 times [2020-10-13 05:11:03,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:03,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469445866] [2020-10-13 05:11:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:03,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:03,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:03,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:08,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 05:11:08,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:11:08,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 05:11:08,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:11:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 05:11:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:11:08,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:08,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:08,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:08,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:08,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:08,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:08,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:08,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:08,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:08,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:08,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:08,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:08,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:08,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:08,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:08,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:08,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:08,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-13 05:11:08,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469445866] [2020-10-13 05:11:08,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:08,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:11:08,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498239805] [2020-10-13 05:11:08,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:11:08,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:11:08,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:11:08,474 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 20 states. [2020-10-13 05:11:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:09,574 INFO L93 Difference]: Finished difference Result 209 states and 221 transitions. [2020-10-13 05:11:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:11:09,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2020-10-13 05:11:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:09,580 INFO L225 Difference]: With dead ends: 209 [2020-10-13 05:11:09,580 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 05:11:09,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:11:09,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 05:11:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2020-10-13 05:11:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 05:11:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-13 05:11:09,600 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 83 [2020-10-13 05:11:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:09,600 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-13 05:11:09,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:11:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-13 05:11:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 05:11:09,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:09,601 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 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 05:11:09,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:11:09,601 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:09,601 INFO L82 PathProgramCache]: Analyzing trace with hash -761327985, now seen corresponding path program 21 times [2020-10-13 05:11:09,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:09,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112127759] [2020-10-13 05:11:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:09,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:14,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:14,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:14,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:14,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 05:11:14,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:11:14,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:11:14,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:14,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:11:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 05:11:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:11:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:14,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:14,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:14,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:14,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:14,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:14,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:14,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:14,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:14,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:14,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:14,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:14,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:14,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:14,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:14,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:14,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:14,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:14,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:14,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-13 05:11:14,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112127759] [2020-10-13 05:11:14,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:14,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:11:14,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114100850] [2020-10-13 05:11:14,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:11:14,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:14,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:11:14,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:11:14,923 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 20 states. [2020-10-13 05:11:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:16,175 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-13 05:11:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:11:16,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-10-13 05:11:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:16,178 INFO L225 Difference]: With dead ends: 112 [2020-10-13 05:11:16,178 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 05:11:16,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:11:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 05:11:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-13 05:11:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 05:11:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-13 05:11:16,192 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 85 [2020-10-13 05:11:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:16,192 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-13 05:11:16,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:11:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-13 05:11:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 05:11:16,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:16,193 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 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 05:11:16,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:11:16,193 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash -308035117, now seen corresponding path program 22 times [2020-10-13 05:11:16,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:16,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380840170] [2020-10-13 05:11:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:16,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:19,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:22,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:22,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 05:11:22,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:11:22,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6085 [2020-10-13 05:11:22,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-13 05:11:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 05:11:22,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:22,996 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-13 05:11:23,117 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-13 05:11:23,279 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-10-13 05:11:23,459 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-10-13 05:11:23,618 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44