/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/loop-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:44:08,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:44:08,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:44:08,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:44:08,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:44:08,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:44:08,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:44:08,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:44:08,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:44:08,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:44:08,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:44:08,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:44:08,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:44:08,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:44:08,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:44:08,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:44:08,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:44:08,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:44:08,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:44:08,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:44:08,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:44:08,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:44:08,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:44:08,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:44:08,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:44:08,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:44:08,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:44:08,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:44:08,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:44:08,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:44:08,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:44:08,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:44:08,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:44:08,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:44:08,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:44:08,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:44:08,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:44:08,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:44:08,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:44:08,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:44:08,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:44:08,116 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 [2020-10-14 23:44:08,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:44:08,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:44:08,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:44:08,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:44:08,153 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:44:08,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:44:08,154 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:44:08,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:44:08,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:44:08,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:44:08,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:44:08,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:44:08,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:44:08,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:44:08,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:44:08,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:44:08,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:44:08,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:44:08,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:44:08,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:44:08,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:44:08,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:44:08,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:44:08,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:44:08,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:44:08,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:44:08,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:44:08,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:44:08,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:44:08,160 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:44:08,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:44:08,525 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:44:08,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:44:08,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:44:08,531 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:44:08,531 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2020-10-14 23:44:08,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19990839b/1e188ece24604d0fae27e638d4bf4a45/FLAGfc92eec92 [2020-10-14 23:44:09,047 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:44:09,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2020-10-14 23:44:09,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19990839b/1e188ece24604d0fae27e638d4bf4a45/FLAGfc92eec92 [2020-10-14 23:44:09,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19990839b/1e188ece24604d0fae27e638d4bf4a45 [2020-10-14 23:44:09,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:44:09,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:44:09,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:44:09,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:44:09,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:44:09,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:09" (1/1) ... [2020-10-14 23:44:09,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75024412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09, skipping insertion in model container [2020-10-14 23:44:09,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:09" (1/1) ... [2020-10-14 23:44:09,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:44:09,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:44:09,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:44:09,679 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:44:09,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:44:09,716 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:44:09,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09 WrapperNode [2020-10-14 23:44:09,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:44:09,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:44:09,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:44:09,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:44:09,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09" (1/1) ... [2020-10-14 23:44:09,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09" (1/1) ... [2020-10-14 23:44:09,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09" (1/1) ... [2020-10-14 23:44:09,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09" (1/1) ... [2020-10-14 23:44:09,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09" (1/1) ... [2020-10-14 23:44:09,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09" (1/1) ... [2020-10-14 23:44:09,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09" (1/1) ... [2020-10-14 23:44:09,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:44:09,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:44:09,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:44:09,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:44:09,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09" (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 [2020-10-14 23:44:09,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:44:09,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:44:09,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:44:09,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:44:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:44:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:44:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:44:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 23:44:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:44:09,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:44:09,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:44:09,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:44:09,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:44:10,112 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:44:10,112 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:44:10,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:10 BoogieIcfgContainer [2020-10-14 23:44:10,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:44:10,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:44:10,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:44:10,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:44:10,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:44:09" (1/3) ... [2020-10-14 23:44:10,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5d9f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:10, skipping insertion in model container [2020-10-14 23:44:10,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:09" (2/3) ... [2020-10-14 23:44:10,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5d9f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:10, skipping insertion in model container [2020-10-14 23:44:10,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:10" (3/3) ... [2020-10-14 23:44:10,125 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2020-10-14 23:44:10,137 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:44:10,144 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:44:10,160 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:44:10,215 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:44:10,216 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:44:10,216 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:44:10,216 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:44:10,216 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:44:10,217 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:44:10,217 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:44:10,217 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:44:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-14 23:44:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:44:10,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:10,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:10,266 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-10-14 23:44:10,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:10,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673691276] [2020-10-14 23:44:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:10,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:10,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:10,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:44:10,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:10,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-14 23:44:10,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:10,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:10,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:10,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:44:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:44:10,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:10,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:10,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:10,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:10,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:10,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 23:44:10,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:10,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:10,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:10,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:10,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 23:44:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:10,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673691276] [2020-10-14 23:44:10,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:44:10,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:44:10,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407199265] [2020-10-14 23:44:10,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:44:10,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:10,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:44:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:44:10,641 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-10-14 23:44:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:10,795 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-14 23:44:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:44:10,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 23:44:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:10,812 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:44:10,812 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 23:44:10,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:44:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 23:44:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 23:44:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:44:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-14 23:44:10,869 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-14 23:44:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:10,870 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-14 23:44:10,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:44:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-14 23:44:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:44:10,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:10,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:10,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:44:10,872 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:10,874 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-10-14 23:44:10,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:10,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854975238] [2020-10-14 23:44:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:10,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:11,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:11,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:44:11,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:11,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-14 23:44:11,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:11,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:11,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:44:11,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:11,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:44:11,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:11,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:11,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:11,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:11,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:11,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:11,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:44:11,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:11,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:11,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:11,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:11,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854975238] [2020-10-14 23:44:11,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:44:11,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:44:11,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322405576] [2020-10-14 23:44:11,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:44:11,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:11,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:44:11,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:44:11,083 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-10-14 23:44:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:11,128 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-14 23:44:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:44:11,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-14 23:44:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:11,130 INFO L225 Difference]: With dead ends: 22 [2020-10-14 23:44:11,130 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:44:11,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:44:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:44:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 23:44:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:44:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-14 23:44:11,139 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-14 23:44:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:11,139 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-14 23:44:11,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:44:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-14 23:44:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:44:11,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:11,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:11,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:44:11,141 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:11,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-10-14 23:44:11,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:11,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327918670] [2020-10-14 23:44:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:11,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:11,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:11,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:44:11,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:11,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-14 23:44:11,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:11,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:44:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:44:11,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:11,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:11,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:11,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:11,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:11,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:11,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:44:11,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:11,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:11,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:11,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:11,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:11,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:11,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327918670] [2020-10-14 23:44:11,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:11,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:44:11,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480109008] [2020-10-14 23:44:11,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:44:11,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:11,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:44:11,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:44:11,284 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-14 23:44:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:11,332 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-14 23:44:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:44:11,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 23:44:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:11,334 INFO L225 Difference]: With dead ends: 24 [2020-10-14 23:44:11,334 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 23:44:11,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:44:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 23:44:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-14 23:44:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:44:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 23:44:11,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-14 23:44:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:11,341 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 23:44:11,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:44:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 23:44:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:44:11,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:11,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:11,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:44:11,343 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:11,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2020-10-14 23:44:11,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:11,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533666345] [2020-10-14 23:44:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:11,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:11,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:11,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:44:11,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:11,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-14 23:44:11,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:11,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:11,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:44:11,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:11,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:44:11,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:11,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:11,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:11,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:11,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:11,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:11,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 23:44:11,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:11,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:11,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:11,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:11,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:11,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 23:44:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:11,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533666345] [2020-10-14 23:44:11,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:11,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:44:11,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703042458] [2020-10-14 23:44:11,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:44:11,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:11,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:44:11,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:44:11,604 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-14 23:44:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:11,669 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-14 23:44:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:44:11,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 23:44:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:11,671 INFO L225 Difference]: With dead ends: 26 [2020-10-14 23:44:11,671 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:44:11,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:44:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:44:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-14 23:44:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:44:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-14 23:44:11,677 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-14 23:44:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:11,678 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-14 23:44:11,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:44:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-14 23:44:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:44:11,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:11,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:11,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:44:11,679 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:11,680 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2020-10-14 23:44:11,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:11,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775637412] [2020-10-14 23:44:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:11,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:11,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:11,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:44:11,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:11,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-14 23:44:11,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:11,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:11,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:44:11,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:11,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:44:11,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:11,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:11,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:11,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:11,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:11,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:11,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:44:11,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:11,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:11,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:11,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775637412] [2020-10-14 23:44:11,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:11,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:44:11,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656612726] [2020-10-14 23:44:11,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:44:11,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:11,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:44:11,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:44:11,833 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-14 23:44:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:11,890 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-14 23:44:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:44:11,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 23:44:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:11,891 INFO L225 Difference]: With dead ends: 28 [2020-10-14 23:44:11,892 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:44:11,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:44:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:44:11,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 23:44:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 23:44:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-14 23:44:11,898 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-14 23:44:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:11,899 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-14 23:44:11,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:44:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-14 23:44:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:44:11,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:11,900 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:11,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:44:11,901 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 4 times [2020-10-14 23:44:11,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:11,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28029995] [2020-10-14 23:44:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:11,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:12,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:12,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:44:12,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:12,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-14 23:44:12,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:12,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:44:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:44:12,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:12,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:12,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:12,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:12,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:12,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:12,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:44:12,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:12,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:12,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:12,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:12,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:12,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:44:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:12,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28029995] [2020-10-14 23:44:12,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:12,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:44:12,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217206700] [2020-10-14 23:44:12,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:44:12,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:44:12,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:44:12,093 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-14 23:44:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:12,170 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-14 23:44:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:44:12,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 23:44:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:12,172 INFO L225 Difference]: With dead ends: 30 [2020-10-14 23:44:12,172 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 23:44:12,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:44:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 23:44:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-14 23:44:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:44:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-14 23:44:12,181 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-14 23:44:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:12,181 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-14 23:44:12,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:44:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-14 23:44:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:44:12,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:12,184 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:12,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:44:12,185 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:12,185 INFO L82 PathProgramCache]: Analyzing trace with hash 954425671, now seen corresponding path program 5 times [2020-10-14 23:44:12,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:12,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732768833] [2020-10-14 23:44:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:12,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:12,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:12,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:44:12,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:12,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-14 23:44:12,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:12,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:12,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:44:12,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:12,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:44:12,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:12,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:12,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:12,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:12,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:12,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:12,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:12,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:12,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:12,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:12,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:12,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732768833] [2020-10-14 23:44:12,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:12,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:44:12,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984539305] [2020-10-14 23:44:12,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:44:12,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:12,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:44:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:44:12,439 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-14 23:44:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:12,522 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-14 23:44:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:44:12,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 23:44:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:12,524 INFO L225 Difference]: With dead ends: 32 [2020-10-14 23:44:12,524 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:44:12,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:44:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:44:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-14 23:44:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:44:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-14 23:44:12,530 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-14 23:44:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:12,531 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-14 23:44:12,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:44:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-14 23:44:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:44:12,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:12,532 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:12,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:44:12,533 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:12,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:12,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1534314089, now seen corresponding path program 6 times [2020-10-14 23:44:12,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:12,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720979311] [2020-10-14 23:44:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:12,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:12,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:12,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:44:12,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:12,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-14 23:44:12,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:12,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:12,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:44:12,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:12,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:44:12,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:12,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:12,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:12,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:12,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:12,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:12,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:12,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:12,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:12,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:12,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:12,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:12,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:12,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720979311] [2020-10-14 23:44:12,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:12,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:44:12,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545129197] [2020-10-14 23:44:12,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:44:12,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:12,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:44:12,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:44:12,737 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-14 23:44:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:12,814 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-14 23:44:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:44:12,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 23:44:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:12,815 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:44:12,815 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:44:12,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:44:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:44:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 23:44:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:44:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-14 23:44:12,822 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-14 23:44:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:12,822 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-14 23:44:12,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:44:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-14 23:44:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:44:12,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:12,824 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:12,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:44:12,824 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash 461335307, now seen corresponding path program 7 times [2020-10-14 23:44:12,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:12,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082822577] [2020-10-14 23:44:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:12,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:12,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:12,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:44:12,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:12,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-14 23:44:12,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:12,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:44:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:44:12,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:13,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:13,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:13,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:13,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:13,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:13,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:13,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:13,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:13,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082822577] [2020-10-14 23:44:13,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:13,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:44:13,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577429613] [2020-10-14 23:44:13,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:44:13,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:13,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:44:13,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:44:13,045 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-14 23:44:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:13,123 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-14 23:44:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:44:13,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-14 23:44:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:13,125 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:44:13,125 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 23:44:13,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:44:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 23:44:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 23:44:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:44:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-14 23:44:13,131 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-14 23:44:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:13,131 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-14 23:44:13,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:44:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-14 23:44:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:44:13,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:13,132 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:13,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:44:13,133 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:13,133 INFO L82 PathProgramCache]: Analyzing trace with hash 120876845, now seen corresponding path program 8 times [2020-10-14 23:44:13,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:13,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859328826] [2020-10-14 23:44:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:13,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:13,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:13,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:44:13,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:13,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-14 23:44:13,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:13,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:44:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:44:13,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:13,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:13,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:13,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:13,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:13,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:13,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:13,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:13,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:13,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:13,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:13,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:13,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859328826] [2020-10-14 23:44:13,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:13,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:44:13,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651278841] [2020-10-14 23:44:13,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:44:13,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:44:13,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:44:13,400 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-14 23:44:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:13,478 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-14 23:44:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:44:13,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 23:44:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:13,480 INFO L225 Difference]: With dead ends: 38 [2020-10-14 23:44:13,480 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 23:44:13,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:44:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 23:44:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 23:44:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:44:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-14 23:44:13,486 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-14 23:44:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:13,486 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-14 23:44:13,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:44:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-14 23:44:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:44:13,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:13,487 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:13,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:44:13,488 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:13,488 INFO L82 PathProgramCache]: Analyzing trace with hash -642190641, now seen corresponding path program 9 times [2020-10-14 23:44:13,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:13,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34312281] [2020-10-14 23:44:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:13,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:13,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:13,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:44:13,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-14 23:44:13,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:13,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:13,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:44:13,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:13,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:44:13,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:13,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:13,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:13,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:13,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:13,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:44:13,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:13,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:13,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:13,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34312281] [2020-10-14 23:44:13,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:13,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:44:13,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149636951] [2020-10-14 23:44:13,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:44:13,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:13,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:44:13,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:44:13,743 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-14 23:44:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:13,826 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-14 23:44:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:44:13,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-14 23:44:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:13,827 INFO L225 Difference]: With dead ends: 40 [2020-10-14 23:44:13,827 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:44:13,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:44:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:44:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 23:44:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 23:44:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-14 23:44:13,833 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-14 23:44:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:13,833 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-14 23:44:13,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:44:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-14 23:44:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:44:13,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:13,834 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:13,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:44:13,835 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash 489362929, now seen corresponding path program 10 times [2020-10-14 23:44:13,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:13,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035251965] [2020-10-14 23:44:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:13,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:44:14,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-14 23:44:14,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:44:14,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:14,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:44:14,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:14,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:14,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:14,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:14,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:14,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035251965] [2020-10-14 23:44:14,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:14,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:44:14,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223149530] [2020-10-14 23:44:14,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:44:14,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:14,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:44:14,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:44:14,131 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-14 23:44:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:14,203 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-14 23:44:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:44:14,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-14 23:44:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:14,205 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:44:14,205 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:44:14,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:44:14,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:44:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 23:44:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:44:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-14 23:44:14,211 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-14 23:44:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:14,211 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-14 23:44:14,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:44:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-14 23:44:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:44:14,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:14,212 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:14,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:44:14,213 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:14,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1285617811, now seen corresponding path program 11 times [2020-10-14 23:44:14,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:14,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821918677] [2020-10-14 23:44:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:44:14,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-14 23:44:14,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:44:14,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:14,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:44:14,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:14,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:14,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:44:14,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:14,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:14,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:14,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:14,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821918677] [2020-10-14 23:44:14,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:14,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:44:14,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054863] [2020-10-14 23:44:14,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:44:14,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:14,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:44:14,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:44:14,655 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-14 23:44:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:14,765 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-14 23:44:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:44:14,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-14 23:44:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:14,767 INFO L225 Difference]: With dead ends: 44 [2020-10-14 23:44:14,767 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:44:14,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:44:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:44:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 23:44:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:44:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-14 23:44:14,777 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-14 23:44:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:14,777 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-14 23:44:14,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:44:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-14 23:44:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:44:14,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:14,779 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:14,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:44:14,780 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:14,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1982380725, now seen corresponding path program 12 times [2020-10-14 23:44:14,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:14,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808251130] [2020-10-14 23:44:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:44:15,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-14 23:44:15,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:44:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:15,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:44:15,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:15,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:15,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:15,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:15,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:15,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:15,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808251130] [2020-10-14 23:44:15,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:15,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:44:15,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048634963] [2020-10-14 23:44:15,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:44:15,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:44:15,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:44:15,320 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-14 23:44:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:15,396 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-14 23:44:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:44:15,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-14 23:44:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:15,397 INFO L225 Difference]: With dead ends: 46 [2020-10-14 23:44:15,397 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 23:44:15,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:44:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 23:44:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 23:44:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:44:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-14 23:44:15,404 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-14 23:44:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:15,405 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-14 23:44:15,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:44:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-14 23:44:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:44:15,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:15,406 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:15,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:44:15,406 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1556642903, now seen corresponding path program 13 times [2020-10-14 23:44:15,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:15,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872552731] [2020-10-14 23:44:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:44:15,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-14 23:44:15,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:44:15,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:15,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:44:15,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:15,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:15,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:15,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:15,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:15,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:15,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872552731] [2020-10-14 23:44:15,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:15,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:44:15,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487968870] [2020-10-14 23:44:15,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:44:15,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:44:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:44:15,861 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-14 23:44:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:15,970 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-14 23:44:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:44:15,971 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-14 23:44:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:15,972 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:44:15,972 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:44:15,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:44:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:44:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 23:44:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:44:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-14 23:44:15,978 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-14 23:44:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:15,978 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-14 23:44:15,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:44:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-14 23:44:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:44:15,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:15,979 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:15,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:44:15,980 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:15,980 INFO L82 PathProgramCache]: Analyzing trace with hash 444489081, now seen corresponding path program 14 times [2020-10-14 23:44:15,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:15,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998035559] [2020-10-14 23:44:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:16,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:16,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:16,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:44:16,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:16,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-14 23:44:16,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:16,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:16,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:44:16,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:16,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:44:16,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:16,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:16,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:16,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:16,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:16,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:16,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:16,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:16,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:16,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:44:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:16,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998035559] [2020-10-14 23:44:16,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:16,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:44:16,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251206912] [2020-10-14 23:44:16,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:44:16,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:16,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:44:16,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:44:16,496 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-14 23:44:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:16,756 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-14 23:44:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:44:16,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-14 23:44:16,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:16,758 INFO L225 Difference]: With dead ends: 50 [2020-10-14 23:44:16,758 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 23:44:16,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:44:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 23:44:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 23:44:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:44:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-14 23:44:16,773 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-14 23:44:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:16,774 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-14 23:44:16,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:44:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-14 23:44:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:44:16,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:16,777 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:16,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:44:16,778 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:16,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:16,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1111522843, now seen corresponding path program 15 times [2020-10-14 23:44:16,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:16,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207949340] [2020-10-14 23:44:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:44:17,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:17,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-14 23:44:17,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:44:17,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:44:17,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:17,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:17,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:17,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:17,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:17,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:17,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:17,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:17,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:17,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207949340] [2020-10-14 23:44:17,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:17,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:44:17,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678065642] [2020-10-14 23:44:17,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:44:17,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:44:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:44:17,415 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-14 23:44:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:17,521 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-14 23:44:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:44:17,522 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-14 23:44:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:17,522 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:44:17,523 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:44:17,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:44:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:44:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 23:44:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 23:44:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-14 23:44:17,531 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-14 23:44:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:17,531 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-14 23:44:17,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:44:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-14 23:44:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:44:17,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:17,534 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:17,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:44:17,534 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2114126275, now seen corresponding path program 16 times [2020-10-14 23:44:17,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:17,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499377393] [2020-10-14 23:44:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:17,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:44:17,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:17,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-14 23:44:17,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:44:17,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:17,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:44:17,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:18,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:18,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:18,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:18,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:18,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:18,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:18,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:18,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:18,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:18,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:18,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:18,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499377393] [2020-10-14 23:44:18,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:18,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:44:18,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30633830] [2020-10-14 23:44:18,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:44:18,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:18,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:44:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:44:18,099 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-14 23:44:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:18,213 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-14 23:44:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:44:18,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-14 23:44:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:18,214 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:44:18,214 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:44:18,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:44:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:44:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 23:44:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:44:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-14 23:44:18,224 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-14 23:44:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:18,227 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-14 23:44:18,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:44:18,228 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-14 23:44:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:44:18,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:18,228 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:18,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:44:18,229 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:18,232 INFO L82 PathProgramCache]: Analyzing trace with hash -996540961, now seen corresponding path program 17 times [2020-10-14 23:44:18,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:18,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716293535] [2020-10-14 23:44:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:18,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:18,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:44:18,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:18,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-14 23:44:18,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:18,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:44:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:44:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:18,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:18,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:18,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:18,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:18,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:18,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:18,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:18,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:18,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716293535] [2020-10-14 23:44:18,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:18,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:44:18,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313535280] [2020-10-14 23:44:18,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:44:18,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:44:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:44:18,840 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-14 23:44:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:18,933 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-14 23:44:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:44:18,934 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-14 23:44:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:18,935 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:44:18,935 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:44:18,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:44:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:44:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 23:44:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:44:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-14 23:44:18,942 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-14 23:44:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:18,943 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-14 23:44:18,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:44:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-14 23:44:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:44:18,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:18,945 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:18,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:44:18,945 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash -738878207, now seen corresponding path program 18 times [2020-10-14 23:44:18,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:18,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836359108] [2020-10-14 23:44:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:18,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:19,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:19,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:44:19,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:19,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-14 23:44:19,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:19,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:19,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:44:19,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:19,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:44:19,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:19,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:19,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:19,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:19,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:19,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:19,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:19,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:19,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:19,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:19,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:19,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:19,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:19,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836359108] [2020-10-14 23:44:19,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:19,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:44:19,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746898370] [2020-10-14 23:44:19,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:44:19,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:44:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:44:19,603 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-14 23:44:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:19,704 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-14 23:44:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:44:19,705 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-14 23:44:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:19,705 INFO L225 Difference]: With dead ends: 58 [2020-10-14 23:44:19,706 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:44:19,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:44:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:44:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 23:44:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:44:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-14 23:44:19,710 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-14 23:44:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:19,711 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-14 23:44:19,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:44:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-14 23:44:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:44:19,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:19,715 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:19,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:44:19,716 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:19,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2061892515, now seen corresponding path program 19 times [2020-10-14 23:44:19,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:19,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171988531] [2020-10-14 23:44:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:19,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:20,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:20,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:44:20,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:20,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-14 23:44:20,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:20,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:20,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:44:20,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:20,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:44:20,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:20,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:20,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:20,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:20,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:20,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:20,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:20,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:20,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:20,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:20,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:20,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:20,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171988531] [2020-10-14 23:44:20,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:20,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:44:20,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069318836] [2020-10-14 23:44:20,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:44:20,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:20,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:44:20,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:44:20,532 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-14 23:44:20,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:20,660 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-14 23:44:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:44:20,661 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-14 23:44:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:20,661 INFO L225 Difference]: With dead ends: 60 [2020-10-14 23:44:20,661 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:44:20,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:44:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:44:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 23:44:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:44:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-14 23:44:20,666 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-14 23:44:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:20,671 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-14 23:44:20,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:44:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-14 23:44:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:44:20,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:20,672 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:20,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:44:20,673 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:20,675 INFO L82 PathProgramCache]: Analyzing trace with hash 658061765, now seen corresponding path program 20 times [2020-10-14 23:44:20,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:20,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313857109] [2020-10-14 23:44:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:20,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:21,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:21,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:44:21,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:21,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-14 23:44:21,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:21,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:44:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:44:21,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:21,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:21,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:21,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:21,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:21,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:21,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:21,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:21,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:21,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:21,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313857109] [2020-10-14 23:44:21,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:21,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:44:21,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841972798] [2020-10-14 23:44:21,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:44:21,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:44:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:44:21,402 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-14 23:44:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:21,512 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-14 23:44:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:44:21,513 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-14 23:44:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:21,514 INFO L225 Difference]: With dead ends: 62 [2020-10-14 23:44:21,514 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:44:21,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:44:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:44:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 23:44:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:44:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-14 23:44:21,519 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-14 23:44:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:21,519 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-14 23:44:21,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:44:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-14 23:44:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:44:21,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:21,520 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:21,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:44:21,520 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:21,521 INFO L82 PathProgramCache]: Analyzing trace with hash 196441959, now seen corresponding path program 21 times [2020-10-14 23:44:21,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:21,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490079704] [2020-10-14 23:44:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:21,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:21,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:21,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:44:21,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:21,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-14 23:44:21,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:21,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:21,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:44:21,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:21,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:44:21,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:22,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:22,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:22,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:22,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:22,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:22,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:22,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:22,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:22,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:22,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:22,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:22,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:22,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490079704] [2020-10-14 23:44:22,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:22,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:44:22,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489699556] [2020-10-14 23:44:22,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:44:22,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:22,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:44:22,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:44:22,308 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-10-14 23:44:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:22,461 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-14 23:44:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:44:22,462 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-14 23:44:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:22,463 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:44:22,463 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 23:44:22,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:44:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 23:44:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-14 23:44:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 23:44:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-14 23:44:22,469 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-14 23:44:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:22,469 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-14 23:44:22,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:44:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-14 23:44:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:44:22,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:22,471 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:22,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:44:22,471 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:22,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1038560119, now seen corresponding path program 22 times [2020-10-14 23:44:22,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:22,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128937635] [2020-10-14 23:44:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:22,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:23,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:23,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:44:23,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:23,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-14 23:44:23,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:23,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:23,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:44:23,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:23,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:44:23,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:23,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:23,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:23,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:23,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:23,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:23,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:23,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:23,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:23,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:23,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:23,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:23,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:23,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128937635] [2020-10-14 23:44:23,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:23,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:44:23,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286054415] [2020-10-14 23:44:23,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:44:23,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:23,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:44:23,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:44:23,493 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-14 23:44:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:23,638 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-14 23:44:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:44:23,639 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-14 23:44:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:23,639 INFO L225 Difference]: With dead ends: 66 [2020-10-14 23:44:23,640 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 23:44:23,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:44:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 23:44:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 23:44:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:44:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-14 23:44:23,643 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-14 23:44:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:23,644 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-14 23:44:23,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:44:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-14 23:44:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:44:23,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:23,645 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:23,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:44:23,645 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1830383915, now seen corresponding path program 23 times [2020-10-14 23:44:23,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:23,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798157901] [2020-10-14 23:44:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:23,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:24,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:24,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:44:24,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:24,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-14 23:44:24,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:24,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:24,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:44:24,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:24,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:44:24,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:24,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:24,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:24,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:24,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:24,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:24,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:24,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:24,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:24,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:24,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:24,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:24,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798157901] [2020-10-14 23:44:24,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:24,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:44:24,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997944974] [2020-10-14 23:44:24,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:44:24,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:24,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:44:24,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:44:24,627 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-10-14 23:44:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:24,771 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-14 23:44:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:44:24,772 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-14 23:44:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:24,773 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:44:24,773 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 23:44:24,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:44:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 23:44:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 23:44:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 23:44:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-14 23:44:24,777 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-14 23:44:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:24,777 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-14 23:44:24,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:44:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-14 23:44:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:44:24,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:24,778 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:24,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:44:24,779 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1516596557, now seen corresponding path program 24 times [2020-10-14 23:44:24,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:24,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005873344] [2020-10-14 23:44:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:24,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:25,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:25,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:44:25,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:25,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-14 23:44:25,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:25,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:44:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:44:25,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:25,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:25,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:25,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:25,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:25,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:25,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:25,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:25,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:25,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:25,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:25,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:25,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005873344] [2020-10-14 23:44:25,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:25,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:44:25,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588625002] [2020-10-14 23:44:25,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:44:25,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:44:25,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:44:25,681 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-14 23:44:25,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:25,904 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-14 23:44:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:44:25,904 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-14 23:44:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:25,905 INFO L225 Difference]: With dead ends: 70 [2020-10-14 23:44:25,905 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 23:44:25,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:44:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 23:44:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-14 23:44:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 23:44:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-14 23:44:25,910 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-14 23:44:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:25,910 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-14 23:44:25,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:44:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-14 23:44:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:44:25,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:25,911 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:25,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:44:25,911 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:25,912 INFO L82 PathProgramCache]: Analyzing trace with hash 614656239, now seen corresponding path program 25 times [2020-10-14 23:44:25,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:25,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574798210] [2020-10-14 23:44:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:25,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:26,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:26,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 23:44:26,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:26,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-14 23:44:26,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:26,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:26,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:44:26,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:26,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 23:44:26,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:26,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:26,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:26,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:26,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:26,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:26,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:26,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:26,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:26,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:26,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:26,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:26,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:26,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574798210] [2020-10-14 23:44:26,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:26,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:44:26,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642316809] [2020-10-14 23:44:26,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:44:26,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:26,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:44:26,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:44:26,846 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-14 23:44:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:27,020 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-14 23:44:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:44:27,020 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-14 23:44:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:27,021 INFO L225 Difference]: With dead ends: 72 [2020-10-14 23:44:27,021 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:44:27,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:44:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:44:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 23:44:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 23:44:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-14 23:44:27,026 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-14 23:44:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:27,026 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-14 23:44:27,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 23:44:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-14 23:44:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 23:44:27,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:27,027 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:27,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:44:27,028 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1433404433, now seen corresponding path program 26 times [2020-10-14 23:44:27,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:27,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467729301] [2020-10-14 23:44:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:27,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:27,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:27,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 23:44:27,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:27,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-14 23:44:27,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:27,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:27,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:44:27,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:27,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:44:27,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:28,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:28,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:28,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:28,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:28,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:28,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:28,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:28,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:28,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:28,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467729301] [2020-10-14 23:44:28,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:28,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 23:44:28,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384073970] [2020-10-14 23:44:28,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 23:44:28,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 23:44:28,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:44:28,118 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-14 23:44:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:28,296 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-14 23:44:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:44:28,296 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-14 23:44:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:28,297 INFO L225 Difference]: With dead ends: 74 [2020-10-14 23:44:28,297 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:44:28,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:44:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:44:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-14 23:44:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 23:44:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-14 23:44:28,307 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-14 23:44:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:28,307 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-14 23:44:28,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 23:44:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-14 23:44:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 23:44:28,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:28,308 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:28,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:44:28,308 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:28,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2023563597, now seen corresponding path program 27 times [2020-10-14 23:44:28,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:28,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009869003] [2020-10-14 23:44:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:28,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:28,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:28,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 23:44:28,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:28,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-14 23:44:28,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:28,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:44:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:28,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 23:44:28,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:29,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:29,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:29,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:29,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:29,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:29,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:29,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:29,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:29,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:29,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:29,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:44:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:29,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009869003] [2020-10-14 23:44:29,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:29,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:44:29,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469040287] [2020-10-14 23:44:29,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:44:29,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:29,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:44:29,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:44:29,435 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-14 23:44:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:29,604 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-14 23:44:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:44:29,604 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-14 23:44:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:29,605 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:44:29,605 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:44:29,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:44:29,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:44:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 23:44:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 23:44:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-14 23:44:29,611 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-14 23:44:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:29,612 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-14 23:44:29,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:44:29,612 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-14 23:44:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 23:44:29,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:29,613 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:29,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:44:29,613 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:29,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:29,615 INFO L82 PathProgramCache]: Analyzing trace with hash 134846677, now seen corresponding path program 28 times [2020-10-14 23:44:29,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:29,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795956103] [2020-10-14 23:44:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:29,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:30,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:30,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:44:30,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:30,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-14 23:44:30,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:30,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 23:44:30,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:30,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 23:44:30,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:30,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:30,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:30,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:30,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:30,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:30,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:30,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:30,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:30,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:30,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:30,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:30,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795956103] [2020-10-14 23:44:30,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:30,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 23:44:30,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954898093] [2020-10-14 23:44:30,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 23:44:30,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 23:44:30,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:44:30,797 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-14 23:44:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:31,049 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-14 23:44:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:44:31,050 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-14 23:44:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:31,051 INFO L225 Difference]: With dead ends: 78 [2020-10-14 23:44:31,052 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:44:31,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:44:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:44:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-14 23:44:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 23:44:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-14 23:44:31,058 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-14 23:44:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:31,058 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-14 23:44:31,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 23:44:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-14 23:44:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:44:31,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:31,060 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:31,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:44:31,060 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -102083977, now seen corresponding path program 29 times [2020-10-14 23:44:31,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:31,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081331670] [2020-10-14 23:44:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:31,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:31,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:31,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 23:44:31,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:31,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 774 [2020-10-14 23:44:31,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:31,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:31,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 23:44:31,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:31,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 23:44:31,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:32,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:32,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:32,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:32,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:32,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:32,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:32,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:32,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:32,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:32,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081331670] [2020-10-14 23:44:32,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:32,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 23:44:32,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065640817] [2020-10-14 23:44:32,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 23:44:32,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:32,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 23:44:32,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:44:32,437 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-14 23:44:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:32,637 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-14 23:44:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:44:32,638 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-14 23:44:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:32,639 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:44:32,639 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 23:44:32,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:44:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 23:44:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-14 23:44:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 23:44:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-14 23:44:32,643 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-14 23:44:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:32,644 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-14 23:44:32,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 23:44:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-14 23:44:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 23:44:32,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:32,645 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:32,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:44:32,645 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:32,646 INFO L82 PathProgramCache]: Analyzing trace with hash -159175783, now seen corresponding path program 30 times [2020-10-14 23:44:32,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:32,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680139612] [2020-10-14 23:44:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:32,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:33,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:33,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 23:44:33,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:33,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-14 23:44:33,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:33,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:33,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 23:44:33,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:33,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 23:44:33,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:33,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:33,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:33,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:33,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:33,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:33,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:33,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:33,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:33,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:33,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680139612] [2020-10-14 23:44:33,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:33,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 23:44:33,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938220934] [2020-10-14 23:44:33,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 23:44:33,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:33,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 23:44:33,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:44:33,941 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-14 23:44:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:34,162 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-14 23:44:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:44:34,162 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-14 23:44:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:34,163 INFO L225 Difference]: With dead ends: 82 [2020-10-14 23:44:34,163 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:44:34,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:44:34,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:44:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-14 23:44:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 23:44:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-14 23:44:34,168 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-14 23:44:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:34,169 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-14 23:44:34,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 23:44:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-14 23:44:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 23:44:34,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:34,170 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:34,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:44:34,170 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:34,171 INFO L82 PathProgramCache]: Analyzing trace with hash 810173499, now seen corresponding path program 31 times [2020-10-14 23:44:34,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:34,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562152596] [2020-10-14 23:44:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:34,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:34,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 23:44:34,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-14 23:44:34,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:34,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 23:44:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 23:44:34,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:35,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:35,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:35,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:35,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:35,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:35,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:35,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:35,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:35,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:35,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:35,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562152596] [2020-10-14 23:44:35,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:35,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 23:44:35,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237843198] [2020-10-14 23:44:35,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 23:44:35,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:35,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 23:44:35,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:44:35,544 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-14 23:44:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:35,790 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-14 23:44:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:44:35,791 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-14 23:44:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:35,792 INFO L225 Difference]: With dead ends: 84 [2020-10-14 23:44:35,793 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 23:44:35,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:44:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 23:44:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-14 23:44:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:44:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-14 23:44:35,798 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-14 23:44:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:35,799 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-14 23:44:35,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 23:44:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-14 23:44:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 23:44:35,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:35,801 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:35,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:44:35,801 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:35,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:35,802 INFO L82 PathProgramCache]: Analyzing trace with hash 346930269, now seen corresponding path program 32 times [2020-10-14 23:44:35,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:35,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522566921] [2020-10-14 23:44:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:35,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:36,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:36,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 23:44:36,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:36,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-14 23:44:36,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:36,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:36,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 23:44:36,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:36,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 23:44:36,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:37,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:37,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:37,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:37,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:37,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:37,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:37,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:37,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:37,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:37,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:37,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:37,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522566921] [2020-10-14 23:44:37,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:37,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 23:44:37,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912702984] [2020-10-14 23:44:37,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 23:44:37,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:37,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 23:44:37,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:44:37,066 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-14 23:44:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:37,227 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-14 23:44:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:44:37,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-14 23:44:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:37,229 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:44:37,229 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 23:44:37,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:44:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 23:44:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-14 23:44:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 23:44:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-14 23:44:37,234 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-14 23:44:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:37,234 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-14 23:44:37,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 23:44:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-14 23:44:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 23:44:37,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:37,235 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:37,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:44:37,235 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:37,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1846785023, now seen corresponding path program 33 times [2020-10-14 23:44:37,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:37,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051450094] [2020-10-14 23:44:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:37,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:37,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 23:44:37,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-14 23:44:37,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:37,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:37,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 23:44:37,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:37,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 23:44:37,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:38,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:38,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:38,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:38,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:38,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:38,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:38,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:38,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:38,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051450094] [2020-10-14 23:44:38,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:38,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 23:44:38,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502321590] [2020-10-14 23:44:38,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 23:44:38,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:38,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 23:44:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:44:38,493 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-14 23:44:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:38,723 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-14 23:44:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:44:38,724 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-14 23:44:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:38,725 INFO L225 Difference]: With dead ends: 88 [2020-10-14 23:44:38,725 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 23:44:38,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:44:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 23:44:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-14 23:44:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 23:44:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-14 23:44:38,730 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-14 23:44:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:38,730 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-14 23:44:38,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 23:44:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-14 23:44:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 23:44:38,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:38,732 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:38,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:44:38,732 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:38,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:38,732 INFO L82 PathProgramCache]: Analyzing trace with hash 98192161, now seen corresponding path program 34 times [2020-10-14 23:44:38,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:38,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811837641] [2020-10-14 23:44:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:38,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:39,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:39,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 23:44:39,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:39,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-14 23:44:39,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:39,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:39,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 23:44:39,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:39,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 23:44:39,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:40,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:40,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:40,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:40,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:40,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:40,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:40,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:40,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:40,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:40,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811837641] [2020-10-14 23:44:40,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:40,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 23:44:40,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310099161] [2020-10-14 23:44:40,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 23:44:40,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:40,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 23:44:40,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:44:40,112 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-14 23:44:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:40,315 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-14 23:44:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 23:44:40,316 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-14 23:44:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:40,317 INFO L225 Difference]: With dead ends: 90 [2020-10-14 23:44:40,317 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 23:44:40,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:44:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 23:44:40,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-14 23:44:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 23:44:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-14 23:44:40,322 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-14 23:44:40,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:40,322 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-14 23:44:40,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 23:44:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-14 23:44:40,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 23:44:40,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:40,323 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:40,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:44:40,324 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:40,324 INFO L82 PathProgramCache]: Analyzing trace with hash -967335485, now seen corresponding path program 35 times [2020-10-14 23:44:40,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:40,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191807048] [2020-10-14 23:44:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:40,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:40,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 23:44:40,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:40,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-14 23:44:40,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:40,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:40,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 23:44:40,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:40,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 23:44:40,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:41,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:41,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:41,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:41,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:41,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:41,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:41,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:41,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:41,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:41,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:41,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:41,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:41,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191807048] [2020-10-14 23:44:41,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:41,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 23:44:41,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686931534] [2020-10-14 23:44:41,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 23:44:41,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:41,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 23:44:41,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:44:41,598 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-14 23:44:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:41,754 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-14 23:44:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 23:44:41,755 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-14 23:44:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:41,756 INFO L225 Difference]: With dead ends: 92 [2020-10-14 23:44:41,756 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:44:41,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:44:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:44:41,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-14 23:44:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 23:44:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-14 23:44:41,763 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-14 23:44:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:41,764 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-14 23:44:41,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 23:44:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-14 23:44:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 23:44:41,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:41,765 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:41,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:44:41,765 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:41,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:41,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1557780453, now seen corresponding path program 36 times [2020-10-14 23:44:41,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:41,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76872462] [2020-10-14 23:44:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:42,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:42,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 23:44:42,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:42,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-14 23:44:42,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:42,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 23:44:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 23:44:42,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:43,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:43,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:43,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:43,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:43,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:43,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:43,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:43,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:43,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:43,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:43,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:43,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76872462] [2020-10-14 23:44:43,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:43,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 23:44:43,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186700164] [2020-10-14 23:44:43,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 23:44:43,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:43,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 23:44:43,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:44:43,141 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-14 23:44:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:43,384 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-14 23:44:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 23:44:43,385 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-14 23:44:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:43,386 INFO L225 Difference]: With dead ends: 94 [2020-10-14 23:44:43,386 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 23:44:43,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:44:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 23:44:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 23:44:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:44:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-14 23:44:43,391 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-14 23:44:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:43,391 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-14 23:44:43,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 23:44:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-14 23:44:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 23:44:43,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:43,393 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:43,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:44:43,393 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:43,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1537674631, now seen corresponding path program 37 times [2020-10-14 23:44:43,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:43,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807291721] [2020-10-14 23:44:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:43,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:43,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 23:44:43,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:43,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-14 23:44:43,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:43,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 23:44:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 23:44:43,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:44,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:44,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:44,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:44,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:44,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:44,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:44,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:44,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:44,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:44,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:44,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:44,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:44,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807291721] [2020-10-14 23:44:44,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:44,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 23:44:44,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732173819] [2020-10-14 23:44:44,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 23:44:44,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:44,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 23:44:44,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:44:44,815 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-14 23:44:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:45,067 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-14 23:44:45,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 23:44:45,067 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-14 23:44:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:45,069 INFO L225 Difference]: With dead ends: 96 [2020-10-14 23:44:45,069 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 23:44:45,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:44:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 23:44:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-14 23:44:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 23:44:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-14 23:44:45,075 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-14 23:44:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:45,075 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-14 23:44:45,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 23:44:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-14 23:44:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 23:44:45,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:45,076 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:45,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:44:45,077 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash -604151127, now seen corresponding path program 38 times [2020-10-14 23:44:45,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:45,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66456950] [2020-10-14 23:44:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:45,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:45,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:45,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 23:44:45,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:45,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-14 23:44:45,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:45,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 23:44:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:45,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 23:44:45,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:46,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:46,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:46,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:46,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:46,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:46,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:46,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:46,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:46,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:46,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:46,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:46,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:46,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66456950] [2020-10-14 23:44:46,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:46,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 23:44:46,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82036379] [2020-10-14 23:44:46,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 23:44:46,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:46,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 23:44:46,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:44:46,647 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-14 23:44:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:46,908 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-14 23:44:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 23:44:46,909 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-14 23:44:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:46,910 INFO L225 Difference]: With dead ends: 98 [2020-10-14 23:44:46,911 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 23:44:46,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:44:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 23:44:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-14 23:44:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 23:44:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-14 23:44:46,916 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-14 23:44:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:46,917 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-14 23:44:46,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 23:44:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-14 23:44:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 23:44:46,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:46,918 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:46,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:44:46,919 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1609369781, now seen corresponding path program 39 times [2020-10-14 23:44:46,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:46,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414431786] [2020-10-14 23:44:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:46,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:47,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:47,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 23:44:47,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:47,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-14 23:44:47,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:47,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 23:44:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 23:44:47,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:48,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:48,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:48,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:48,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:48,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:48,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:48,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:48,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:48,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:48,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:48,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:48,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:48,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414431786] [2020-10-14 23:44:48,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:48,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 23:44:48,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799041770] [2020-10-14 23:44:48,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 23:44:48,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:48,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 23:44:48,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:44:48,599 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-14 23:44:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:48,844 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-14 23:44:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 23:44:48,844 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-14 23:44:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:48,845 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:44:48,846 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 23:44:48,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:44:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 23:44:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-14 23:44:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 23:44:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-14 23:44:48,852 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-14 23:44:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:48,853 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-14 23:44:48,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 23:44:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-14 23:44:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 23:44:48,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:48,854 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:48,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:44:48,854 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1256854675, now seen corresponding path program 40 times [2020-10-14 23:44:48,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:48,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95309200] [2020-10-14 23:44:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:48,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:49,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:49,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 23:44:49,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-14 23:44:49,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:49,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 23:44:49,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:49,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 23:44:49,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:50,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:50,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:50,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:50,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:50,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:50,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:50,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:50,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:50,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:50,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:50,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:50,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:50,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95309200] [2020-10-14 23:44:50,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:50,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 23:44:50,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189169081] [2020-10-14 23:44:50,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 23:44:50,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:50,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 23:44:50,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:44:50,550 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-14 23:44:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:50,728 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-14 23:44:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 23:44:50,728 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-14 23:44:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:50,730 INFO L225 Difference]: With dead ends: 102 [2020-10-14 23:44:50,730 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:44:50,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:44:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:44:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 23:44:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:44:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-14 23:44:50,736 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-14 23:44:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:50,736 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-14 23:44:50,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 23:44:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-14 23:44:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 23:44:50,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:50,737 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:50,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:44:50,738 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:50,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1792254193, now seen corresponding path program 41 times [2020-10-14 23:44:50,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:50,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464988444] [2020-10-14 23:44:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:50,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:51,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:51,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 23:44:51,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:51,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-14 23:44:51,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:51,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:51,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 23:44:51,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:51,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 23:44:51,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:52,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:52,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:52,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:52,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:52,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:52,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:52,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:52,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:52,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464988444] [2020-10-14 23:44:52,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:52,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 23:44:52,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502740528] [2020-10-14 23:44:52,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 23:44:52,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 23:44:52,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:44:52,422 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-14 23:44:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:52,670 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-14 23:44:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 23:44:52,670 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-14 23:44:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:52,672 INFO L225 Difference]: With dead ends: 104 [2020-10-14 23:44:52,672 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 23:44:52,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:44:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 23:44:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-14 23:44:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:44:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-14 23:44:52,678 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-14 23:44:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:52,679 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-14 23:44:52,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 23:44:52,679 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-14 23:44:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 23:44:52,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:52,680 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:52,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:44:52,680 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash -915115471, now seen corresponding path program 42 times [2020-10-14 23:44:52,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:52,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102448824] [2020-10-14 23:44:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:52,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:53,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:53,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 23:44:53,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:53,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-14 23:44:53,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:53,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:53,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 23:44:53,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:53,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 23:44:53,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:54,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:54,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:54,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:54,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:54,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:54,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:54,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:54,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:54,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:54,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:54,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:54,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:54,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102448824] [2020-10-14 23:44:54,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:54,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 23:44:54,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088975852] [2020-10-14 23:44:54,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 23:44:54,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 23:44:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:44:54,492 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-14 23:44:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:54,654 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-14 23:44:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 23:44:54,655 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-14 23:44:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:54,656 INFO L225 Difference]: With dead ends: 106 [2020-10-14 23:44:54,656 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 23:44:54,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:44:54,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 23:44:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-14 23:44:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 23:44:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-14 23:44:54,663 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-14 23:44:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:54,663 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-14 23:44:54,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 23:44:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-14 23:44:54,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 23:44:54,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:54,664 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:54,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:44:54,664 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:54,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash 201606355, now seen corresponding path program 43 times [2020-10-14 23:44:54,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:54,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253221058] [2020-10-14 23:44:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:54,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:55,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:55,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 23:44:55,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:55,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-14 23:44:55,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:55,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:55,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 23:44:55,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:55,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 23:44:55,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:56,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:56,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:56,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:56,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:56,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:56,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:56,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:56,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:56,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:56,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:56,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:56,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:56,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253221058] [2020-10-14 23:44:56,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:56,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 23:44:56,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182311922] [2020-10-14 23:44:56,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 23:44:56,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 23:44:56,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:44:56,545 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-14 23:44:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:56,804 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-14 23:44:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 23:44:56,805 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-14 23:44:56,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:56,806 INFO L225 Difference]: With dead ends: 108 [2020-10-14 23:44:56,806 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 23:44:56,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:44:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 23:44:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-14 23:44:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 23:44:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-14 23:44:56,811 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-14 23:44:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:56,811 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-14 23:44:56,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 23:44:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-14 23:44:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 23:44:56,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:56,812 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:56,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:44:56,812 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:56,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:56,813 INFO L82 PathProgramCache]: Analyzing trace with hash -370542859, now seen corresponding path program 44 times [2020-10-14 23:44:56,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:56,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035347005] [2020-10-14 23:44:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:56,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:57,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:57,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 23:44:57,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:57,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-10-14 23:44:57,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:57,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 23:44:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:57,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 23:44:57,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:58,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:58,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:58,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:58,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:58,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:58,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:58,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:58,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:58,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:58,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035347005] [2020-10-14 23:44:58,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:58,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 23:44:58,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80430320] [2020-10-14 23:44:58,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 23:44:58,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:58,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 23:44:58,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:44:58,736 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-14 23:44:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:58,947 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-14 23:44:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 23:44:58,947 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-14 23:44:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:58,948 INFO L225 Difference]: With dead ends: 110 [2020-10-14 23:44:58,948 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 23:44:58,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:44:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 23:44:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 23:44:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:44:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-14 23:44:58,953 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-14 23:44:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:58,954 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-14 23:44:58,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 23:44:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-14 23:44:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 23:44:58,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:58,955 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:58,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:44:58,955 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:58,956 INFO L82 PathProgramCache]: Analyzing trace with hash -450123625, now seen corresponding path program 45 times [2020-10-14 23:44:58,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:58,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769960411] [2020-10-14 23:44:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:58,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:59,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:59,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 23:44:59,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:59,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-14 23:44:59,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:59,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:59,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 23:44:59,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:59,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 23:44:59,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:00,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:00,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:00,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:00,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:00,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:00,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:00,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:00,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:00,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:00,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769960411] [2020-10-14 23:45:00,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:00,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 23:45:00,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344543116] [2020-10-14 23:45:00,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 23:45:00,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:00,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 23:45:00,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:45:00,967 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-14 23:45:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:01,142 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-14 23:45:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 23:45:01,143 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-14 23:45:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:01,144 INFO L225 Difference]: With dead ends: 112 [2020-10-14 23:45:01,144 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 23:45:01,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:45:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 23:45:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-14 23:45:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 23:45:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-14 23:45:01,147 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-14 23:45:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:01,147 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-14 23:45:01,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 23:45:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-14 23:45:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 23:45:01,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:01,148 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:01,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:45:01,149 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:01,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:01,149 INFO L82 PathProgramCache]: Analyzing trace with hash 382171577, now seen corresponding path program 46 times [2020-10-14 23:45:01,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:01,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812516503] [2020-10-14 23:45:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:01,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:02,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:02,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 23:45:02,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-14 23:45:02,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:02,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 23:45:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 23:45:02,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:03,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:03,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:03,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:03,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:03,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:03,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:03,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:03,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:03,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:03,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:03,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812516503] [2020-10-14 23:45:03,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:03,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 23:45:03,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100117940] [2020-10-14 23:45:03,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 23:45:03,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 23:45:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:45:03,286 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-14 23:45:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:03,457 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-14 23:45:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 23:45:03,458 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-14 23:45:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:03,459 INFO L225 Difference]: With dead ends: 114 [2020-10-14 23:45:03,459 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 23:45:03,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:45:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 23:45:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 23:45:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:45:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-14 23:45:03,464 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-14 23:45:03,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:03,464 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-14 23:45:03,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 23:45:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-14 23:45:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 23:45:03,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:03,465 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:03,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:45:03,465 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:03,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:03,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1353943643, now seen corresponding path program 47 times [2020-10-14 23:45:03,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:03,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102709034] [2020-10-14 23:45:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:03,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:04,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:04,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 23:45:04,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:04,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-14 23:45:04,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:04,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:04,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 23:45:04,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:04,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 23:45:04,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:05,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:05,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:05,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:05,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:05,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:05,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:05,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:05,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:05,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:05,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102709034] [2020-10-14 23:45:05,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:05,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 23:45:05,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577275960] [2020-10-14 23:45:05,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 23:45:05,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:05,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 23:45:05,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:45:05,686 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-10-14 23:45:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:05,865 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-14 23:45:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 23:45:05,865 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-14 23:45:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:05,867 INFO L225 Difference]: With dead ends: 116 [2020-10-14 23:45:05,867 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 23:45:05,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:45:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 23:45:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-14 23:45:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 23:45:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-14 23:45:05,872 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-14 23:45:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:05,873 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-14 23:45:05,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 23:45:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-14 23:45:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 23:45:05,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:05,874 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:05,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:45:05,874 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:05,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1075971459, now seen corresponding path program 48 times [2020-10-14 23:45:05,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:05,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592188638] [2020-10-14 23:45:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:05,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:06,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:06,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 23:45:06,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:06,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 876 [2020-10-14 23:45:06,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:06,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:06,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 23:45:06,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:06,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 23:45:06,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:08,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:08,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:08,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:08,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:08,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:08,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:08,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:08,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:08,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592188638] [2020-10-14 23:45:08,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:08,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 23:45:08,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889661766] [2020-10-14 23:45:08,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 23:45:08,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:08,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 23:45:08,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:45:08,166 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-14 23:45:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:08,383 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-14 23:45:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 23:45:08,383 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-14 23:45:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:08,384 INFO L225 Difference]: With dead ends: 118 [2020-10-14 23:45:08,385 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 23:45:08,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:45:08,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 23:45:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-14 23:45:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 23:45:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-14 23:45:08,391 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-14 23:45:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:08,391 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-14 23:45:08,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 23:45:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-14 23:45:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 23:45:08,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:08,393 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:08,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:45:08,393 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash 237824543, now seen corresponding path program 49 times [2020-10-14 23:45:08,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:08,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237248594] [2020-10-14 23:45:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:09,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:09,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 23:45:09,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:09,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-10-14 23:45:09,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:09,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:09,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 23:45:09,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:09,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 23:45:09,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:11,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:11,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:11,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:11,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:11,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:11,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:11,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:11,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:11,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:11,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237248594] [2020-10-14 23:45:11,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:11,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 23:45:11,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193832004] [2020-10-14 23:45:11,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 23:45:11,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:11,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 23:45:11,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 23:45:11,196 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-10-14 23:45:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:11,460 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-14 23:45:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 23:45:11,461 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-14 23:45:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:11,462 INFO L225 Difference]: With dead ends: 120 [2020-10-14 23:45:11,462 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 23:45:11,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 23:45:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 23:45:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-14 23:45:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 23:45:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-14 23:45:11,467 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-10-14 23:45:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:11,467 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-14 23:45:11,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 23:45:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-14 23:45:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 23:45:11,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:11,469 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:11,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:45:11,469 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash 75397441, now seen corresponding path program 50 times [2020-10-14 23:45:11,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:11,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419754032] [2020-10-14 23:45:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:11,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:12,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:12,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 23:45:12,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:12,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-14 23:45:12,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:12,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:12,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 23:45:12,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:12,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 23:45:12,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:13,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:13,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:13,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:13,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:13,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:13,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:13,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:13,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:13,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:13,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:13,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:13,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:13,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419754032] [2020-10-14 23:45:13,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:13,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 23:45:13,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828709381] [2020-10-14 23:45:13,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 23:45:13,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:13,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 23:45:13,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:45:13,981 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-10-14 23:45:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:14,290 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-14 23:45:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 23:45:14,290 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-10-14 23:45:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:14,292 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:45:14,292 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 23:45:14,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:45:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 23:45:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-14 23:45:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 23:45:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-10-14 23:45:14,298 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-10-14 23:45:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:14,298 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-10-14 23:45:14,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 23:45:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-10-14 23:45:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 23:45:14,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:14,299 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:14,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:45:14,300 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1398224925, now seen corresponding path program 51 times [2020-10-14 23:45:14,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:14,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571306480] [2020-10-14 23:45:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:14,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:15,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:15,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 23:45:15,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:15,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-10-14 23:45:15,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:15,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:15,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 23:45:15,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:15,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 23:45:15,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:16,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:16,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:16,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:16,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:16,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:16,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:16,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:16,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:16,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:16,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571306480] [2020-10-14 23:45:16,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:16,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 23:45:16,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702243377] [2020-10-14 23:45:16,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 23:45:16,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:16,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 23:45:16,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:45:16,936 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-10-14 23:45:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:17,285 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-14 23:45:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 23:45:17,286 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-10-14 23:45:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:17,287 INFO L225 Difference]: With dead ends: 124 [2020-10-14 23:45:17,287 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 23:45:17,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:45:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 23:45:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 23:45:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 23:45:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-14 23:45:17,294 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-10-14 23:45:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:17,294 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-14 23:45:17,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 23:45:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-14 23:45:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 23:45:17,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:17,296 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:17,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:45:17,296 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash -210110971, now seen corresponding path program 52 times [2020-10-14 23:45:17,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:17,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405984069] [2020-10-14 23:45:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:17,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:18,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:18,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 23:45:18,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:18,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1201 [2020-10-14 23:45:18,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:18,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 23:45:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 23:45:18,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:20,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:20,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:20,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:20,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:20,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:20,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:20,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:20,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:20,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:20,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:20,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:20,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:20,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405984069] [2020-10-14 23:45:20,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:20,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 23:45:20,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207401253] [2020-10-14 23:45:20,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 23:45:20,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:20,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 23:45:20,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 23:45:20,165 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-10-14 23:45:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:20,534 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-14 23:45:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 23:45:20,535 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-10-14 23:45:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:20,536 INFO L225 Difference]: With dead ends: 126 [2020-10-14 23:45:20,536 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 23:45:20,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 23:45:20,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 23:45:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-14 23:45:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 23:45:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-10-14 23:45:20,542 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-10-14 23:45:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:20,542 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-10-14 23:45:20,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 23:45:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-10-14 23:45:20,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 23:45:20,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:20,543 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:20,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:45:20,544 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:20,544 INFO L82 PathProgramCache]: Analyzing trace with hash -893901913, now seen corresponding path program 53 times [2020-10-14 23:45:20,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:20,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761047511] [2020-10-14 23:45:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:20,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:21,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:21,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 23:45:21,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:21,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-14 23:45:21,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:21,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:21,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 23:45:21,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:21,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 23:45:21,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:23,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:23,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:23,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:23,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:23,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:23,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:23,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:23,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:23,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:23,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761047511] [2020-10-14 23:45:23,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:23,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 23:45:23,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384913615] [2020-10-14 23:45:23,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 23:45:23,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:23,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 23:45:23,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 23:45:23,400 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-10-14 23:45:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:23,670 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-14 23:45:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 23:45:23,670 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-10-14 23:45:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:23,672 INFO L225 Difference]: With dead ends: 128 [2020-10-14 23:45:23,672 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 23:45:23,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 23:45:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 23:45:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 23:45:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 23:45:23,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-14 23:45:23,677 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-10-14 23:45:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:23,678 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-14 23:45:23,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 23:45:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-14 23:45:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 23:45:23,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:23,679 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:23,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:45:23,679 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:23,679 INFO L82 PathProgramCache]: Analyzing trace with hash -887000887, now seen corresponding path program 54 times [2020-10-14 23:45:23,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:23,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233831315] [2020-10-14 23:45:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:23,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:24,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:24,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 23:45:24,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:24,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-14 23:45:24,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:24,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 23:45:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-14 23:45:24,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:26,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:26,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:26,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:26,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:26,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:26,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:26,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:26,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:26,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:26,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:26,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:26,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:45:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:26,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233831315] [2020-10-14 23:45:26,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:26,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 23:45:26,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295856475] [2020-10-14 23:45:26,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 23:45:26,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 23:45:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:45:26,621 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-10-14 23:45:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:26,977 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-14 23:45:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 23:45:26,978 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-10-14 23:45:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:26,979 INFO L225 Difference]: With dead ends: 130 [2020-10-14 23:45:26,979 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 23:45:26,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:45:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 23:45:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-14 23:45:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 23:45:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-14 23:45:26,985 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-10-14 23:45:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:26,986 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-14 23:45:26,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 23:45:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-14 23:45:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 23:45:26,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:26,987 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:26,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:45:26,987 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:26,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1449917803, now seen corresponding path program 55 times [2020-10-14 23:45:26,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:26,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457770541] [2020-10-14 23:45:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:27,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:28,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:28,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 23:45:28,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:28,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1380 [2020-10-14 23:45:28,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:28,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 23:45:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 23:45:28,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:30,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:30,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:30,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:30,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:30,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:30,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:30,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:30,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:30,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:30,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:30,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:30,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:30,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457770541] [2020-10-14 23:45:30,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:30,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 23:45:30,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790894640] [2020-10-14 23:45:30,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 23:45:30,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:30,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 23:45:30,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 23:45:30,211 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-10-14 23:45:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:30,460 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-14 23:45:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 23:45:30,460 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-10-14 23:45:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:30,462 INFO L225 Difference]: With dead ends: 132 [2020-10-14 23:45:30,462 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 23:45:30,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 23:45:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 23:45:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-14 23:45:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 23:45:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-10-14 23:45:30,470 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-10-14 23:45:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:30,470 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-10-14 23:45:30,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 23:45:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-10-14 23:45:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 23:45:30,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:30,471 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:30,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:45:30,472 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:30,472 INFO L82 PathProgramCache]: Analyzing trace with hash 960883085, now seen corresponding path program 56 times [2020-10-14 23:45:30,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:30,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672097120] [2020-10-14 23:45:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:31,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:31,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 23:45:31,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:31,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1277 [2020-10-14 23:45:31,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:31,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:31,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 23:45:31,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:31,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 23:45:31,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:33,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:33,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:33,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:33,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:33,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:33,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:33,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:33,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:33,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:33,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:33,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:33,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:33,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672097120] [2020-10-14 23:45:33,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:33,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 23:45:33,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541288603] [2020-10-14 23:45:33,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 23:45:33,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:33,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 23:45:33,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 23:45:33,665 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-10-14 23:45:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:34,051 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-14 23:45:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 23:45:34,052 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-10-14 23:45:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:34,053 INFO L225 Difference]: With dead ends: 134 [2020-10-14 23:45:34,053 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 23:45:34,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 23:45:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 23:45:34,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-14 23:45:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 23:45:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-10-14 23:45:34,060 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-10-14 23:45:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:34,061 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-10-14 23:45:34,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 23:45:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-10-14 23:45:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 23:45:34,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:34,062 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:34,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:45:34,062 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:34,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash -850045649, now seen corresponding path program 57 times [2020-10-14 23:45:34,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:34,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986768240] [2020-10-14 23:45:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:34,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:35,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:35,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 23:45:35,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-14 23:45:35,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:35,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:35,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 23:45:35,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:35,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-14 23:45:35,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:37,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:37,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:37,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:37,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:37,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:37,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:37,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:37,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:37,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:37,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986768240] [2020-10-14 23:45:37,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:37,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 23:45:37,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359863116] [2020-10-14 23:45:37,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 23:45:37,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:37,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 23:45:37,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 23:45:37,326 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-10-14 23:45:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:37,581 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-14 23:45:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 23:45:37,582 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-10-14 23:45:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:37,583 INFO L225 Difference]: With dead ends: 136 [2020-10-14 23:45:37,583 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 23:45:37,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 23:45:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 23:45:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-14 23:45:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 23:45:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-10-14 23:45:37,589 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-10-14 23:45:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:37,589 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-10-14 23:45:37,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 23:45:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-10-14 23:45:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 23:45:37,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:37,590 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:37,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 23:45:37,591 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1690804143, now seen corresponding path program 58 times [2020-10-14 23:45:37,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:37,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160003143] [2020-10-14 23:45:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:37,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:38,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:38,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 23:45:39,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:39,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1386 [2020-10-14 23:45:39,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:39,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:39,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 23:45:39,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:39,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-14 23:45:39,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:40,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:40,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:40,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:40,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:40,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:40,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:40,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:40,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:40,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:40,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:40,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:40,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:40,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160003143] [2020-10-14 23:45:40,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:40,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 23:45:40,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503992315] [2020-10-14 23:45:40,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 23:45:40,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:40,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 23:45:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 23:45:40,968 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 62 states. [2020-10-14 23:45:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:41,354 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-14 23:45:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-14 23:45:41,355 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 128 [2020-10-14 23:45:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:41,357 INFO L225 Difference]: With dead ends: 138 [2020-10-14 23:45:41,357 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 23:45:41,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 23:45:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 23:45:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-14 23:45:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 23:45:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-10-14 23:45:41,362 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-10-14 23:45:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:41,362 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-10-14 23:45:41,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 23:45:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-10-14 23:45:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 23:45:41,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:41,364 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:41,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 23:45:41,364 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:41,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2089102067, now seen corresponding path program 59 times [2020-10-14 23:45:41,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:41,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882530564] [2020-10-14 23:45:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:41,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:42,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:42,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 23:45:42,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:42,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1499 [2020-10-14 23:45:42,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:42,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:42,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-14 23:45:42,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:42,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 23:45:42,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:44,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:44,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:44,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:44,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:44,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:44,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:44,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:44,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:44,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882530564] [2020-10-14 23:45:44,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:44,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-14 23:45:44,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453024392] [2020-10-14 23:45:44,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-14 23:45:44,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:44,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-14 23:45:44,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 23:45:44,936 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 63 states. [2020-10-14 23:45:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:45,318 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-14 23:45:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 23:45:45,319 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 130 [2020-10-14 23:45:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:45,321 INFO L225 Difference]: With dead ends: 140 [2020-10-14 23:45:45,321 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 23:45:45,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 23:45:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 23:45:45,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-14 23:45:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 23:45:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-14 23:45:45,326 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-10-14 23:45:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:45,326 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-14 23:45:45,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-14 23:45:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-14 23:45:45,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 23:45:45,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:45,327 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:45,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 23:45:45,328 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1036637461, now seen corresponding path program 60 times [2020-10-14 23:45:45,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:45,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967379991] [2020-10-14 23:45:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:45,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:47,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:47,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 23:45:47,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:47,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2016 [2020-10-14 23:45:47,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:47,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:47,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-14 23:45:47,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:47,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 23:45:47,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:49,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:49,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:49,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:49,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:49,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:49,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:49,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:49,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:49,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:49,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967379991] [2020-10-14 23:45:49,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:49,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-14 23:45:49,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833869209] [2020-10-14 23:45:49,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-14 23:45:49,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:49,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-14 23:45:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 23:45:49,478 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 64 states. [2020-10-14 23:45:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:49,754 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-10-14 23:45:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-14 23:45:49,754 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 132 [2020-10-14 23:45:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:49,756 INFO L225 Difference]: With dead ends: 142 [2020-10-14 23:45:49,756 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 23:45:49,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 23:45:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 23:45:49,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-14 23:45:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 23:45:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-10-14 23:45:49,761 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-10-14 23:45:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:49,762 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-10-14 23:45:49,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-14 23:45:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-10-14 23:45:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 23:45:49,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:49,763 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:49,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 23:45:49,763 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:49,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1064534345, now seen corresponding path program 61 times [2020-10-14 23:45:49,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:49,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135584646] [2020-10-14 23:45:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:49,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:51,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:51,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 23:45:51,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:51,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1652 [2020-10-14 23:45:51,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:51,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-14 23:45:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 23:45:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:53,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:53,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:53,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:53,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:53,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:53,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:53,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:53,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:53,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:53,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:53,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135584646] [2020-10-14 23:45:53,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:53,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-14 23:45:53,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527944024] [2020-10-14 23:45:53,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-14 23:45:53,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:53,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-14 23:45:53,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 23:45:53,647 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 65 states. [2020-10-14 23:45:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:54,051 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-10-14 23:45:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-14 23:45:54,051 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 134 [2020-10-14 23:45:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:54,053 INFO L225 Difference]: With dead ends: 144 [2020-10-14 23:45:54,053 INFO L226 Difference]: Without dead ends: 138 [2020-10-14 23:45:54,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 23:45:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-14 23:45:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-14 23:45:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 23:45:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-10-14 23:45:54,058 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-10-14 23:45:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:54,058 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-10-14 23:45:54,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-14 23:45:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-10-14 23:45:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 23:45:54,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:54,060 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:54,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 23:45:54,060 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1656010791, now seen corresponding path program 62 times [2020-10-14 23:45:54,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:54,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100484420] [2020-10-14 23:45:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:54,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:55,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:55,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 23:45:55,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:55,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1615 [2020-10-14 23:45:55,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:55,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:55,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-14 23:45:55,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:55,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-14 23:45:55,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:58,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:58,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:58,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:58,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:58,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:58,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:58,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:58,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:45:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:58,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100484420] [2020-10-14 23:45:58,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:58,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-14 23:45:58,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846976739] [2020-10-14 23:45:58,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-14 23:45:58,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:58,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-14 23:45:58,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 23:45:58,091 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 66 states. [2020-10-14 23:45:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:58,499 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-10-14 23:45:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-14 23:45:58,499 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 136 [2020-10-14 23:45:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:58,501 INFO L225 Difference]: With dead ends: 146 [2020-10-14 23:45:58,502 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 23:45:58,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 23:45:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 23:45:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-14 23:45:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 23:45:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-10-14 23:45:58,506 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-10-14 23:45:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:58,506 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-10-14 23:45:58,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-14 23:45:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-10-14 23:45:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 23:45:58,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:58,508 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:58,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 23:45:58,508 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:58,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1165774971, now seen corresponding path program 63 times [2020-10-14 23:45:58,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:58,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84283459] [2020-10-14 23:45:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:58,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:00,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:00,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 23:46:00,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:00,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1593 [2020-10-14 23:46:00,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:00,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:00,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-14 23:46:00,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:00,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-14 23:46:00,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:02,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:02,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:02,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:02,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:02,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:02,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:02,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:02,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:02,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:02,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:02,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:02,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:02,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84283459] [2020-10-14 23:46:02,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:02,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-14 23:46:02,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039082929] [2020-10-14 23:46:02,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-14 23:46:02,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:02,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-14 23:46:02,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 23:46:02,571 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 67 states. [2020-10-14 23:46:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:03,012 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-10-14 23:46:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-14 23:46:03,012 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 138 [2020-10-14 23:46:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:03,014 INFO L225 Difference]: With dead ends: 148 [2020-10-14 23:46:03,014 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 23:46:03,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 23:46:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 23:46:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-14 23:46:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 23:46:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-10-14 23:46:03,019 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-10-14 23:46:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:03,019 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-10-14 23:46:03,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-14 23:46:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-10-14 23:46:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 23:46:03,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:03,021 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:03,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 23:46:03,021 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1517438819, now seen corresponding path program 64 times [2020-10-14 23:46:03,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:03,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952912585] [2020-10-14 23:46:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:03,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:04,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:04,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 23:46:04,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:04,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1843 [2020-10-14 23:46:04,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:04,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:04,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-14 23:46:04,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:04,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-14 23:46:04,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:07,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:07,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:07,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:07,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:07,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:07,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:07,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:07,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:07,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:07,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:07,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:07,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:07,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952912585] [2020-10-14 23:46:07,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:07,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-14 23:46:07,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425336410] [2020-10-14 23:46:07,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-14 23:46:07,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:07,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-14 23:46:07,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 23:46:07,475 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 68 states. [2020-10-14 23:46:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:07,930 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-10-14 23:46:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 23:46:07,932 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 140 [2020-10-14 23:46:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:07,934 INFO L225 Difference]: With dead ends: 150 [2020-10-14 23:46:07,934 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 23:46:07,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 23:46:07,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 23:46:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-14 23:46:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 23:46:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-10-14 23:46:07,939 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-10-14 23:46:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:07,939 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-10-14 23:46:07,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-14 23:46:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-10-14 23:46:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 23:46:07,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:07,940 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:07,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 23:46:07,941 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:07,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1189453887, now seen corresponding path program 65 times [2020-10-14 23:46:07,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:07,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778962067] [2020-10-14 23:46:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:07,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:09,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:09,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 23:46:09,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:09,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1816 [2020-10-14 23:46:09,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:09,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-14 23:46:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-14 23:46:09,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:12,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:12,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:12,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:12,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:12,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:12,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:12,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:12,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:12,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:12,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:12,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:12,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:12,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778962067] [2020-10-14 23:46:12,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:12,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-14 23:46:12,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939767260] [2020-10-14 23:46:12,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-14 23:46:12,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:12,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-14 23:46:12,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 23:46:12,396 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 69 states. [2020-10-14 23:46:12,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:12,867 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-10-14 23:46:12,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-14 23:46:12,868 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 142 [2020-10-14 23:46:12,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:12,869 INFO L225 Difference]: With dead ends: 152 [2020-10-14 23:46:12,870 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 23:46:12,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 23:46:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 23:46:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-14 23:46:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 23:46:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-10-14 23:46:12,873 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-10-14 23:46:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:12,873 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-10-14 23:46:12,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-14 23:46:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-10-14 23:46:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 23:46:12,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:12,875 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:12,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 23:46:12,875 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:12,876 INFO L82 PathProgramCache]: Analyzing trace with hash -236837023, now seen corresponding path program 66 times [2020-10-14 23:46:12,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:12,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260254491] [2020-10-14 23:46:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:12,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:14,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:14,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 23:46:14,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:14,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1896 [2020-10-14 23:46:14,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:14,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:14,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-14 23:46:14,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:14,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-14 23:46:14,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:17,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:17,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:17,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:17,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:17,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:17,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:17,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:17,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:17,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:17,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:17,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:17,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:17,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260254491] [2020-10-14 23:46:17,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:17,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-14 23:46:17,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130259575] [2020-10-14 23:46:17,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-14 23:46:17,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:17,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-14 23:46:17,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 23:46:17,518 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 70 states. [2020-10-14 23:46:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:18,002 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-10-14 23:46:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-14 23:46:18,003 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 144 [2020-10-14 23:46:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:18,004 INFO L225 Difference]: With dead ends: 154 [2020-10-14 23:46:18,004 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 23:46:18,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 23:46:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 23:46:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-14 23:46:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 23:46:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-10-14 23:46:18,008 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-10-14 23:46:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:18,009 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-10-14 23:46:18,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-14 23:46:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-10-14 23:46:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 23:46:18,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:18,010 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:18,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 23:46:18,010 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash -807834109, now seen corresponding path program 67 times [2020-10-14 23:46:18,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:18,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882340155] [2020-10-14 23:46:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:18,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:20,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 23:46:20,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:20,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2041 [2020-10-14 23:46:20,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:20,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-14 23:46:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-14 23:46:20,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:22,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:22,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:22,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:22,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:22,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:22,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:22,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:22,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:22,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:22,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:22,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:22,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882340155] [2020-10-14 23:46:22,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:22,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-14 23:46:22,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252995221] [2020-10-14 23:46:22,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-14 23:46:22,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:22,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-14 23:46:22,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 23:46:22,806 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 71 states. [2020-10-14 23:46:23,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:23,293 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-10-14 23:46:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-14 23:46:23,294 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 146 [2020-10-14 23:46:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:23,295 INFO L225 Difference]: With dead ends: 156 [2020-10-14 23:46:23,295 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 23:46:23,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 23:46:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 23:46:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-14 23:46:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 23:46:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-10-14 23:46:23,301 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-10-14 23:46:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:23,301 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-10-14 23:46:23,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-14 23:46:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-10-14 23:46:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 23:46:23,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:23,302 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:23,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 23:46:23,303 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash 219780133, now seen corresponding path program 68 times [2020-10-14 23:46:23,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:23,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973334913] [2020-10-14 23:46:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:23,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:25,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-14 23:46:25,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:25,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1985 [2020-10-14 23:46:25,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:25,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-14 23:46:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-14 23:46:25,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:28,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:28,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:28,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:28,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:28,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:28,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:28,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:28,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:28,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973334913] [2020-10-14 23:46:28,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:28,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-14 23:46:28,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949322046] [2020-10-14 23:46:28,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-14 23:46:28,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-14 23:46:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 23:46:28,062 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 72 states. [2020-10-14 23:46:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:28,514 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-10-14 23:46:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-14 23:46:28,515 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 148 [2020-10-14 23:46:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:28,516 INFO L225 Difference]: With dead ends: 158 [2020-10-14 23:46:28,516 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 23:46:28,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 23:46:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 23:46:28,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-14 23:46:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 23:46:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-10-14 23:46:28,521 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-10-14 23:46:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:28,521 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-10-14 23:46:28,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-14 23:46:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-10-14 23:46:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 23:46:28,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:28,522 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:28,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 23:46:28,522 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:28,523 INFO L82 PathProgramCache]: Analyzing trace with hash -85411385, now seen corresponding path program 69 times [2020-10-14 23:46:28,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:28,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202541968] [2020-10-14 23:46:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:28,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:30,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:30,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 23:46:30,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:30,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1960 [2020-10-14 23:46:30,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:30,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-14 23:46:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-14 23:46:30,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:33,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:33,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:33,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:33,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:33,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:33,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:33,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:33,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:33,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202541968] [2020-10-14 23:46:33,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:33,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-14 23:46:33,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550522087] [2020-10-14 23:46:33,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-14 23:46:33,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-14 23:46:33,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 23:46:33,331 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 73 states. [2020-10-14 23:46:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:33,625 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-10-14 23:46:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-14 23:46:33,626 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 150 [2020-10-14 23:46:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:33,627 INFO L225 Difference]: With dead ends: 160 [2020-10-14 23:46:33,627 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 23:46:33,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 23:46:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 23:46:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-14 23:46:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 23:46:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-10-14 23:46:33,631 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-10-14 23:46:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:33,632 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-10-14 23:46:33,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-14 23:46:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-10-14 23:46:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 23:46:33,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:33,633 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:33,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 23:46:33,633 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1316684055, now seen corresponding path program 70 times [2020-10-14 23:46:33,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:33,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563793487] [2020-10-14 23:46:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:33,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:35,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:35,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 23:46:35,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:35,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2052 [2020-10-14 23:46:35,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:35,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-14 23:46:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-14 23:46:35,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:38,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:38,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:38,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:38,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:38,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:38,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:38,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:38,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:38,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:38,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:38,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:38,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:38,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563793487] [2020-10-14 23:46:38,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:38,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-14 23:46:38,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482272620] [2020-10-14 23:46:38,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-14 23:46:38,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-14 23:46:38,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 23:46:38,685 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 74 states. [2020-10-14 23:46:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:39,064 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-10-14 23:46:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-14 23:46:39,065 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 152 [2020-10-14 23:46:39,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:39,066 INFO L225 Difference]: With dead ends: 162 [2020-10-14 23:46:39,066 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 23:46:39,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 23:46:39,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 23:46:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-14 23:46:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 23:46:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-10-14 23:46:39,071 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-10-14 23:46:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:39,072 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-10-14 23:46:39,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-14 23:46:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-10-14 23:46:39,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 23:46:39,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:39,073 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:39,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 23:46:39,073 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash 841253771, now seen corresponding path program 71 times [2020-10-14 23:46:39,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:39,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212285297] [2020-10-14 23:46:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:39,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:41,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-14 23:46:41,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:41,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2120 [2020-10-14 23:46:41,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:41,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:41,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-14 23:46:41,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:41,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-14 23:46:41,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:44,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:44,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:44,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:44,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:44,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:44,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:44,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:44,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:44,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:44,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:44,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212285297] [2020-10-14 23:46:44,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:44,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-14 23:46:44,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092606881] [2020-10-14 23:46:44,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-14 23:46:44,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:44,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-14 23:46:44,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 23:46:44,380 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 75 states. [2020-10-14 23:46:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:44,867 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-10-14 23:46:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-14 23:46:44,867 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 154 [2020-10-14 23:46:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:44,869 INFO L225 Difference]: With dead ends: 164 [2020-10-14 23:46:44,869 INFO L226 Difference]: Without dead ends: 158 [2020-10-14 23:46:44,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 23:46:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-14 23:46:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-14 23:46:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 23:46:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-10-14 23:46:44,874 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-10-14 23:46:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:44,875 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-10-14 23:46:44,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-14 23:46:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-10-14 23:46:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 23:46:44,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:44,876 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:44,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 23:46:44,876 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash 150300589, now seen corresponding path program 72 times [2020-10-14 23:46:44,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:44,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418192215] [2020-10-14 23:46:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:44,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:47,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-14 23:46:47,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2128 [2020-10-14 23:46:47,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:47,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-14 23:46:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-14 23:46:47,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:50,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:50,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:50,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:50,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:50,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:50,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:50,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:50,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:50,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:50,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418192215] [2020-10-14 23:46:50,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:50,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-14 23:46:50,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390661] [2020-10-14 23:46:50,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-14 23:46:50,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:50,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-14 23:46:50,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-14 23:46:50,313 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 76 states. [2020-10-14 23:46:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:50,839 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-10-14 23:46:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-14 23:46:50,840 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 156 [2020-10-14 23:46:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:50,842 INFO L225 Difference]: With dead ends: 166 [2020-10-14 23:46:50,842 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 23:46:50,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-14 23:46:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 23:46:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-14 23:46:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 23:46:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-10-14 23:46:50,847 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-10-14 23:46:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:50,847 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-10-14 23:46:50,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-14 23:46:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-10-14 23:46:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-14 23:46:50,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:50,848 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:50,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-14 23:46:50,848 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1864223567, now seen corresponding path program 73 times [2020-10-14 23:46:50,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:50,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458033295] [2020-10-14 23:46:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:50,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:53,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:53,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-14 23:46:53,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:53,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2205 [2020-10-14 23:46:53,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:53,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-14 23:46:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-14 23:46:53,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:56,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:56,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:56,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:56,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:56,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:56,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:56,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:56,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:56,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:56,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:56,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:56,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458033295] [2020-10-14 23:46:56,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:56,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-14 23:46:56,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971362578] [2020-10-14 23:46:56,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-14 23:46:56,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:56,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-14 23:46:56,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 23:46:56,402 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 77 states. [2020-10-14 23:46:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:56,877 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-10-14 23:46:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-14 23:46:56,877 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 158 [2020-10-14 23:46:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:56,879 INFO L225 Difference]: With dead ends: 168 [2020-10-14 23:46:56,879 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 23:46:56,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 23:46:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 23:46:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-14 23:46:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 23:46:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-10-14 23:46:56,883 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-10-14 23:46:56,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:56,884 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-10-14 23:46:56,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-14 23:46:56,884 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-10-14 23:46:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-14 23:46:56,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:56,885 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:56,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-14 23:46:56,885 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:56,886 INFO L82 PathProgramCache]: Analyzing trace with hash -323236239, now seen corresponding path program 74 times [2020-10-14 23:46:56,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:56,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298647326] [2020-10-14 23:46:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:56,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:59,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:59,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-14 23:46:59,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:59,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2317 [2020-10-14 23:46:59,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:59,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:59,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-14 23:46:59,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:59,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-14 23:46:59,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:02,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:02,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:02,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:02,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:02,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:02,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:02,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:02,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:02,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:02,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:02,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:02,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298647326] [2020-10-14 23:47:02,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:02,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-14 23:47:02,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469335563] [2020-10-14 23:47:02,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-14 23:47:02,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:02,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-14 23:47:02,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 23:47:02,626 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 78 states. [2020-10-14 23:47:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:03,176 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-10-14 23:47:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-14 23:47:03,177 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 160 [2020-10-14 23:47:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:03,178 INFO L225 Difference]: With dead ends: 170 [2020-10-14 23:47:03,179 INFO L226 Difference]: Without dead ends: 164 [2020-10-14 23:47:03,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 23:47:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-14 23:47:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-10-14 23:47:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 23:47:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-10-14 23:47:03,183 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-10-14 23:47:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:03,183 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-10-14 23:47:03,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-14 23:47:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-10-14 23:47:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-14 23:47:03,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:03,184 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:03,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-14 23:47:03,185 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2061865235, now seen corresponding path program 75 times [2020-10-14 23:47:03,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:03,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644556370] [2020-10-14 23:47:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:03,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:05,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:05,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-14 23:47:05,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:05,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2350 [2020-10-14 23:47:05,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:05,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:05,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-14 23:47:05,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:05,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-14 23:47:05,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:09,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:09,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:09,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:09,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:09,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:09,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:09,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:09,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:09,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:47:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:09,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644556370] [2020-10-14 23:47:09,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:09,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-14 23:47:09,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178440169] [2020-10-14 23:47:09,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-14 23:47:09,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:09,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-14 23:47:09,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2020-10-14 23:47:09,032 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 79 states. [2020-10-14 23:47:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:09,529 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2020-10-14 23:47:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-14 23:47:09,530 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 162 [2020-10-14 23:47:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:09,532 INFO L225 Difference]: With dead ends: 172 [2020-10-14 23:47:09,532 INFO L226 Difference]: Without dead ends: 166 [2020-10-14 23:47:09,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2020-10-14 23:47:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-14 23:47:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-14 23:47:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 23:47:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-10-14 23:47:09,536 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-10-14 23:47:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:09,537 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-10-14 23:47:09,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-14 23:47:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-10-14 23:47:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-14 23:47:09,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:09,538 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:09,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-14 23:47:09,538 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:09,539 INFO L82 PathProgramCache]: Analyzing trace with hash 631845685, now seen corresponding path program 76 times [2020-10-14 23:47:09,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:09,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094384393] [2020-10-14 23:47:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:09,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:11,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:11,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-14 23:47:11,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:11,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2357 [2020-10-14 23:47:11,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:11,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:11,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-14 23:47:11,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:11,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-14 23:47:11,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:15,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:15,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:15,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:15,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:15,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:15,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:15,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:15,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:15,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:15,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094384393] [2020-10-14 23:47:15,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:15,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-14 23:47:15,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366527004] [2020-10-14 23:47:15,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-14 23:47:15,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:15,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-14 23:47:15,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2020-10-14 23:47:15,501 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 80 states. [2020-10-14 23:47:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:15,855 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2020-10-14 23:47:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-14 23:47:15,856 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 164 [2020-10-14 23:47:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:15,857 INFO L225 Difference]: With dead ends: 174 [2020-10-14 23:47:15,857 INFO L226 Difference]: Without dead ends: 168 [2020-10-14 23:47:15,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2020-10-14 23:47:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-14 23:47:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-10-14 23:47:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 23:47:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-10-14 23:47:15,863 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-10-14 23:47:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:15,863 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-10-14 23:47:15,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-14 23:47:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-10-14 23:47:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-14 23:47:15,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:15,864 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:15,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-14 23:47:15,865 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:15,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:15,865 INFO L82 PathProgramCache]: Analyzing trace with hash 772592855, now seen corresponding path program 77 times [2020-10-14 23:47:15,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:15,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596710] [2020-10-14 23:47:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:15,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:18,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-14 23:47:18,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:18,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2436 [2020-10-14 23:47:18,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:18,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-14 23:47:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-14 23:47:18,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:22,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:22,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:22,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:22,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:22,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:22,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:22,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:22,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:22,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:22,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:22,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596710] [2020-10-14 23:47:22,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:22,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-14 23:47:22,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508233613] [2020-10-14 23:47:22,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-14 23:47:22,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:22,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-14 23:47:22,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2020-10-14 23:47:22,108 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 81 states. [2020-10-14 23:47:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:22,670 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-10-14 23:47:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-14 23:47:22,671 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 166 [2020-10-14 23:47:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:22,672 INFO L225 Difference]: With dead ends: 176 [2020-10-14 23:47:22,672 INFO L226 Difference]: Without dead ends: 170 [2020-10-14 23:47:22,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2020-10-14 23:47:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-14 23:47:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-14 23:47:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-14 23:47:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-10-14 23:47:22,678 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-10-14 23:47:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:22,678 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-10-14 23:47:22,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-14 23:47:22,678 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-10-14 23:47:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-14 23:47:22,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:22,679 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:22,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-14 23:47:22,680 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:22,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1408330247, now seen corresponding path program 78 times [2020-10-14 23:47:22,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:22,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22510626] [2020-10-14 23:47:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:22,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:25,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:25,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-14 23:47:25,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:25,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2719 [2020-10-14 23:47:25,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:25,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:25,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-14 23:47:25,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:25,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-14 23:47:25,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:29,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:29,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:29,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:29,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:29,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:29,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:29,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:29,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:29,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:29,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:29,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:29,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:29,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22510626] [2020-10-14 23:47:29,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:29,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-14 23:47:29,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345396952] [2020-10-14 23:47:29,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-14 23:47:29,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:29,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-14 23:47:29,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2020-10-14 23:47:29,346 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 82 states. [2020-10-14 23:47:29,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:29,822 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-10-14 23:47:29,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-14 23:47:29,823 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 168 [2020-10-14 23:47:29,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:29,824 INFO L225 Difference]: With dead ends: 178 [2020-10-14 23:47:29,824 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 23:47:29,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2020-10-14 23:47:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 23:47:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-10-14 23:47:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-14 23:47:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-10-14 23:47:29,828 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-10-14 23:47:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:29,829 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-10-14 23:47:29,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-14 23:47:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-10-14 23:47:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-14 23:47:29,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:29,830 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:29,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-14 23:47:29,830 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:29,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1331390821, now seen corresponding path program 79 times [2020-10-14 23:47:29,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:29,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865839582] [2020-10-14 23:47:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:32,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:32,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-14 23:47:32,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:32,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2720 [2020-10-14 23:47:32,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:32,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-14 23:47:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-14 23:47:32,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:36,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:36,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:36,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:36,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:36,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:36,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:36,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:36,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:36,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:36,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:36,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:36,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:36,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865839582] [2020-10-14 23:47:36,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:36,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-14 23:47:36,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482170280] [2020-10-14 23:47:36,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-14 23:47:36,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:36,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-14 23:47:36,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2020-10-14 23:47:36,644 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 83 states. [2020-10-14 23:47:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:37,060 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-10-14 23:47:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-14 23:47:37,060 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 170 [2020-10-14 23:47:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:37,062 INFO L225 Difference]: With dead ends: 180 [2020-10-14 23:47:37,062 INFO L226 Difference]: Without dead ends: 174 [2020-10-14 23:47:37,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2020-10-14 23:47:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-14 23:47:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-14 23:47:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 23:47:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-10-14 23:47:37,068 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-10-14 23:47:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:37,068 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-10-14 23:47:37,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-14 23:47:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-10-14 23:47:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-14 23:47:37,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:37,069 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:37,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-14 23:47:37,070 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:37,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:37,070 INFO L82 PathProgramCache]: Analyzing trace with hash -407046467, now seen corresponding path program 80 times [2020-10-14 23:47:37,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:37,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605436466] [2020-10-14 23:47:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:37,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:39,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-14 23:47:39,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:39,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2736 [2020-10-14 23:47:39,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:39,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-14 23:47:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-14 23:47:39,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:43,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:43,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:43,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:43,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:43,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:43,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:43,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:43,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:43,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605436466] [2020-10-14 23:47:43,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:43,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-14 23:47:43,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785802601] [2020-10-14 23:47:43,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-14 23:47:43,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-14 23:47:43,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2020-10-14 23:47:43,967 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 84 states. [2020-10-14 23:47:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:44,594 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2020-10-14 23:47:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-14 23:47:44,595 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 172 [2020-10-14 23:47:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:44,596 INFO L225 Difference]: With dead ends: 182 [2020-10-14 23:47:44,596 INFO L226 Difference]: Without dead ends: 176 [2020-10-14 23:47:44,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2020-10-14 23:47:44,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-14 23:47:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-14 23:47:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-14 23:47:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-10-14 23:47:44,601 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-10-14 23:47:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:44,601 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-10-14 23:47:44,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-14 23:47:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-10-14 23:47:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-14 23:47:44,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:44,603 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:44,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-14 23:47:44,603 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:44,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:44,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1170352545, now seen corresponding path program 81 times [2020-10-14 23:47:44,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:44,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128845305] [2020-10-14 23:47:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:44,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:47,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:47,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-14 23:47:47,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:47,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2944 [2020-10-14 23:47:47,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:47,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-14 23:47:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-14 23:47:47,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:51,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:51,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:51,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:51,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:51,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:51,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:51,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:51,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:51,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128845305] [2020-10-14 23:47:51,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:51,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-14 23:47:51,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770005558] [2020-10-14 23:47:51,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-14 23:47:51,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:51,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-14 23:47:51,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2020-10-14 23:47:51,833 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 85 states. [2020-10-14 23:47:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:52,463 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2020-10-14 23:47:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-14 23:47:52,464 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 174 [2020-10-14 23:47:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:52,465 INFO L225 Difference]: With dead ends: 184 [2020-10-14 23:47:52,466 INFO L226 Difference]: Without dead ends: 178 [2020-10-14 23:47:52,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2020-10-14 23:47:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-14 23:47:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-14 23:47:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 23:47:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-10-14 23:47:52,470 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-10-14 23:47:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:52,471 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-10-14 23:47:52,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-14 23:47:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-10-14 23:47:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-14 23:47:52,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:52,472 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:52,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-14 23:47:52,472 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash -268085887, now seen corresponding path program 82 times [2020-10-14 23:47:52,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:52,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900096951] [2020-10-14 23:47:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:52,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:55,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:55,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-14 23:47:55,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:55,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2873 [2020-10-14 23:47:55,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:55,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:55,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-14 23:47:55,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:55,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-14 23:47:55,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:59,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:59,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:59,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:59,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:59,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:59,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:59,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:59,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:59,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900096951] [2020-10-14 23:47:59,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:59,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-14 23:47:59,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955683783] [2020-10-14 23:47:59,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-14 23:47:59,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:59,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-14 23:47:59,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2020-10-14 23:47:59,716 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 86 states. [2020-10-14 23:48:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:00,370 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-10-14 23:48:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-14 23:48:00,371 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 176 [2020-10-14 23:48:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:00,372 INFO L225 Difference]: With dead ends: 186 [2020-10-14 23:48:00,372 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 23:48:00,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2020-10-14 23:48:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 23:48:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-10-14 23:48:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 23:48:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-10-14 23:48:00,377 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-10-14 23:48:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:00,377 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-10-14 23:48:00,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-14 23:48:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-10-14 23:48:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-14 23:48:00,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:00,378 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:00,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-14 23:48:00,378 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash -773221341, now seen corresponding path program 83 times [2020-10-14 23:48:00,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:00,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951947566] [2020-10-14 23:48:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:00,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:03,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:03,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-14 23:48:03,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:03,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2977 [2020-10-14 23:48:03,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:03,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 85 [2020-10-14 23:48:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:48:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-14 23:48:03,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0