/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/array-fpi/condm.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:11:18,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:11:18,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:11:18,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:11:18,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:11:18,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:11:18,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:11:18,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:11:18,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:11:18,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:11:18,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:11:18,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:11:18,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:11:18,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:11:18,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:11:18,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:11:18,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:11:18,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:11:18,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:11:18,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:11:18,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:11:18,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:11:18,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:11:18,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:11:18,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:11:18,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:11:18,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:11:18,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:11:18,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:11:18,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:11:18,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:11:18,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:11:18,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:11:18,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:11:18,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:11:18,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:11:18,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:11:18,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:11:18,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:11:18,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:11:18,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:11:18,139 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 18:11:18,185 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:11:18,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:11:18,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:11:18,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:11:18,189 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:11:18,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:11:18,189 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:11:18,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:11:18,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:11:18,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:11:18,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:11:18,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:11:18,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:11:18,192 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:11:18,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:11:18,192 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:11:18,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:11:18,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:11:18,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:11:18,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:11:18,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:11:18,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:11:18,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:11:18,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:11:18,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:11:18,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:11:18,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:11:18,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:11:18,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:11:18,194 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 18:11:18,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:11:18,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:11:18,562 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:11:18,565 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:11:18,565 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:11:18,566 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condm.c [2020-10-14 18:11:18,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c907ed36/55875fbfb19547998d61116d3bdd350d/FLAG0d38f039f [2020-10-14 18:11:19,170 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:11:19,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condm.c [2020-10-14 18:11:19,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c907ed36/55875fbfb19547998d61116d3bdd350d/FLAG0d38f039f [2020-10-14 18:11:19,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c907ed36/55875fbfb19547998d61116d3bdd350d [2020-10-14 18:11:19,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:11:19,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:11:19,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:11:19,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:11:19,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:11:19,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:11:19" (1/1) ... [2020-10-14 18:11:19,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1573d552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:19, skipping insertion in model container [2020-10-14 18:11:19,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:11:19" (1/1) ... [2020-10-14 18:11:19,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:11:19,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:11:19,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:11:19,833 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:11:19,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:11:20,016 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:11:20,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20 WrapperNode [2020-10-14 18:11:20,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:11:20,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:11:20,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:11:20,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:11:20,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20" (1/1) ... [2020-10-14 18:11:20,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20" (1/1) ... [2020-10-14 18:11:20,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20" (1/1) ... [2020-10-14 18:11:20,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20" (1/1) ... [2020-10-14 18:11:20,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20" (1/1) ... [2020-10-14 18:11:20,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20" (1/1) ... [2020-10-14 18:11:20,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20" (1/1) ... [2020-10-14 18:11:20,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:11:20,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:11:20,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:11:20,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:11:20,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20" (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 18:11:20,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:11:20,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:11:20,166 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:11:20,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:11:20,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:11:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:11:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:11:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:11:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:11:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:11:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:11:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:11:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:11:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:11:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:11:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:11:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:11:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:11:20,440 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:11:20,440 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 18:11:20,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:11:20 BoogieIcfgContainer [2020-10-14 18:11:20,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:11:20,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:11:20,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:11:20,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:11:20,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:11:19" (1/3) ... [2020-10-14 18:11:20,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b046b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:11:20, skipping insertion in model container [2020-10-14 18:11:20,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:11:20" (2/3) ... [2020-10-14 18:11:20,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b046b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:11:20, skipping insertion in model container [2020-10-14 18:11:20,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:11:20" (3/3) ... [2020-10-14 18:11:20,458 INFO L109 eAbstractionObserver]: Analyzing ICFG condm.c [2020-10-14 18:11:20,497 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:11:20,520 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:11:20,552 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:11:20,579 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:11:20,579 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:11:20,580 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:11:20,580 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:11:20,580 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:11:20,580 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:11:20,581 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:11:20,581 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:11:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-14 18:11:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 18:11:20,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:20,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:20,615 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:20,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1524373234, now seen corresponding path program 1 times [2020-10-14 18:11:20,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:20,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681578445] [2020-10-14 18:11:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:20,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:20,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:20,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:21,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 18:11:21,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:11:21,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-14 18:11:21,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:21,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:21,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:11:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:11:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:11:21,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 18:11:21,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:21,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:21,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:21,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:21,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 18:11:21,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:21,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:21,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:21,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:21,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:21,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:21,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:21,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:11:21,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 18:11:21,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:21,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:21,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:21,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:21,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:21,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:21,990 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 18:11:21,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681578445] [2020-10-14 18:11:21,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:11:21,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:11:21,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978686349] [2020-10-14 18:11:22,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:11:22,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:22,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:11:22,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:11:22,025 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 5 states. [2020-10-14 18:11:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:22,252 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2020-10-14 18:11:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:11:22,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 18:11:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:22,266 INFO L225 Difference]: With dead ends: 73 [2020-10-14 18:11:22,266 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 18:11:22,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:11:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 18:11:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-14 18:11:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 18:11:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-14 18:11:22,320 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-10-14 18:11:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:22,320 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-14 18:11:22,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:11:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-14 18:11:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:11:22,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:22,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:22,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:11:22,323 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:22,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash 373909448, now seen corresponding path program 1 times [2020-10-14 18:11:22,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:22,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140312850] [2020-10-14 18:11:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:22,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:23,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:25,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:25,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:11:25,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:11:25,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2723 [2020-10-14 18:11:25,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:25,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:25,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:11:25,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:11:25,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 18:11:25,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:25,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:25,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:25,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:25,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:25,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:25,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:11:25,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:25,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:25,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:25,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:25,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:25,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:11:25,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:25,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:25,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:25,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:25,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:25,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:11:25,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:25,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:25,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:25,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:25,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140312850] [2020-10-14 18:11:25,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:25,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:11:25,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985221594] [2020-10-14 18:11:25,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:11:25,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:11:25,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:11:25,348 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2020-10-14 18:11:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:25,709 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-10-14 18:11:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:11:25,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-14 18:11:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:25,712 INFO L225 Difference]: With dead ends: 87 [2020-10-14 18:11:25,712 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 18:11:25,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:11:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 18:11:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 39. [2020-10-14 18:11:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 18:11:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-14 18:11:25,727 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 27 [2020-10-14 18:11:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:25,727 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-14 18:11:25,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:11:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-14 18:11:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:11:25,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:25,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:25,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:11:25,730 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:25,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1053967818, now seen corresponding path program 1 times [2020-10-14 18:11:25,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:25,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513724168] [2020-10-14 18:11:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:25,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:25,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:26,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:26,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:26,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:11:26,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:11:26,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-14 18:11:26,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:26,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:11:26,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:26,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:11:26,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:26,650 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 21 [2020-10-14 18:11:26,871 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2020-10-14 18:11:27,121 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 16 [2020-10-14 18:11:27,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:27,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:27,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:27,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:27,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:27,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:11:27,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:27,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:27,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:27,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:27,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:27,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:27,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:27,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:27,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:27,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:27,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:27,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:11:27,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:27,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:27,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:27,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:27,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:27,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513724168] [2020-10-14 18:11:27,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:27,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:11:27,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103339849] [2020-10-14 18:11:27,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:11:27,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:11:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:11:27,203 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 11 states. [2020-10-14 18:11:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:27,829 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-14 18:11:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:11:27,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-14 18:11:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:27,832 INFO L225 Difference]: With dead ends: 79 [2020-10-14 18:11:27,832 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 18:11:27,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:11:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 18:11:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-10-14 18:11:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:11:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-14 18:11:27,847 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 27 [2020-10-14 18:11:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:27,847 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-14 18:11:27,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:11:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-14 18:11:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:11:27,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:27,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:27,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:11:27,850 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:27,850 INFO L82 PathProgramCache]: Analyzing trace with hash -721471158, now seen corresponding path program 2 times [2020-10-14 18:11:27,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:27,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262210834] [2020-10-14 18:11:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:27,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:27,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:27,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:27,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:27,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:29,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:11:29,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:11:29,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-10-14 18:11:29,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:29,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:29,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:11:29,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:11:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:11:29,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:29,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:29,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:29,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:29,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:29,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:11:29,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:29,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:29,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:29,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:29,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:29,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:29,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:29,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:29,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:11:29,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:29,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:29,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:11:29,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262210834] [2020-10-14 18:11:29,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:29,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:11:29,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755091432] [2020-10-14 18:11:29,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:11:29,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:29,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:11:29,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:11:29,657 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 7 states. [2020-10-14 18:11:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:29,819 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-14 18:11:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:11:29,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-14 18:11:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:29,824 INFO L225 Difference]: With dead ends: 73 [2020-10-14 18:11:29,825 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 18:11:29,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:11:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 18:11:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-14 18:11:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:11:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-14 18:11:29,839 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 29 [2020-10-14 18:11:29,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:29,839 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-14 18:11:29,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:11:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-14 18:11:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 18:11:29,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:29,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:29,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:11:29,842 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash -540550706, now seen corresponding path program 2 times [2020-10-14 18:11:29,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:29,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364751549] [2020-10-14 18:11:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:29,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:30,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:30,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:31,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:31,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:31,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:31,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:11:31,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:11:31,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2043 [2020-10-14 18:11:31,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:31,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:11:31,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:31,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:11:31,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:32,224 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-10-14 18:11:32,433 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2020-10-14 18:11:32,769 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 26 [2020-10-14 18:11:32,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:32,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:32,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:32,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:32,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:11:32,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:32,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:32,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:32,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:32,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:32,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:11:32,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:32,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:32,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:32,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:32,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:11:32,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:32,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:32,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:32,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:32,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:32,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:32,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364751549] [2020-10-14 18:11:32,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:32,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:11:32,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398142476] [2020-10-14 18:11:32,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:11:32,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:32,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:11:32,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:11:32,863 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 13 states. [2020-10-14 18:11:33,476 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-14 18:11:33,690 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-10-14 18:11:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:33,901 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-10-14 18:11:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:11:33,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-14 18:11:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:33,904 INFO L225 Difference]: With dead ends: 93 [2020-10-14 18:11:33,904 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 18:11:33,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:11:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 18:11:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2020-10-14 18:11:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 18:11:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-14 18:11:33,917 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 30 [2020-10-14 18:11:33,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:33,917 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-14 18:11:33,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:11:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-14 18:11:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:11:33,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:33,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:33,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:11:33,920 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash -800892852, now seen corresponding path program 3 times [2020-10-14 18:11:33,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:33,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984745741] [2020-10-14 18:11:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:33,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:34,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:34,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:34,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 18:11:34,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:11:34,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-14 18:11:34,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:34,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:34,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:11:34,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:11:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:36,443 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 504 DAG size of output: 26 [2020-10-14 18:11:36,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:36,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:36,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:36,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:36,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:36,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:11:36,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:36,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:36,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:36,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:36,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:36,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:36,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:36,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:36,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:36,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:36,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:11:36,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:36,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:36,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:11:36,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984745741] [2020-10-14 18:11:36,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:36,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:11:36,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252158151] [2020-10-14 18:11:36,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:11:36,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:36,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:11:36,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:11:36,522 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 11 states. [2020-10-14 18:11:37,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:37,128 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-14 18:11:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:11:37,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-14 18:11:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:37,133 INFO L225 Difference]: With dead ends: 92 [2020-10-14 18:11:37,133 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 18:11:37,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:11:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 18:11:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-10-14 18:11:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:11:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-14 18:11:37,156 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 32 [2020-10-14 18:11:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:37,157 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-14 18:11:37,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:11:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-14 18:11:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:11:37,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:37,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:37,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:11:37,161 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash -503605430, now seen corresponding path program 3 times [2020-10-14 18:11:37,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:37,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237751783] [2020-10-14 18:11:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:37,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:38,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:38,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:38,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:11:38,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:11:38,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-14 18:11:38,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:38,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:38,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:11:38,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:38,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:11:38,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:38,933 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2020-10-14 18:11:39,090 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 29 [2020-10-14 18:11:39,262 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2020-10-14 18:11:39,440 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2020-10-14 18:11:40,337 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 26 [2020-10-14 18:11:40,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:40,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:40,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:40,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:40,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:40,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:40,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:40,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:40,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:40,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:40,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:40,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:40,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:40,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:40,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:40,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:40,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:40,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:40,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:40,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:40,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237751783] [2020-10-14 18:11:40,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:40,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:11:40,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410295773] [2020-10-14 18:11:40,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:11:40,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:11:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:11:40,430 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 14 states. [2020-10-14 18:11:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:41,031 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-10-14 18:11:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:11:41,032 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-14 18:11:41,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:41,033 INFO L225 Difference]: With dead ends: 102 [2020-10-14 18:11:41,033 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 18:11:41,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:11:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 18:11:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-14 18:11:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:11:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-14 18:11:41,044 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 33 [2020-10-14 18:11:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:41,044 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-14 18:11:41,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:11:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-14 18:11:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 18:11:41,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:41,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:41,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:11:41,046 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1400640736, now seen corresponding path program 1 times [2020-10-14 18:11:41,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:41,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727246357] [2020-10-14 18:11:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:41,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:41,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:41,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:41,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:41,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 18:11:41,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:11:41,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-14 18:11:41,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:41,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:11:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:11:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:41,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:41,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:41,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:41,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:41,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:41,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:41,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:41,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:41,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:41,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:41,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:41,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:41,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:41,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:41,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:41,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:41,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:41,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:41,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:41,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:41,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 18:11:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:41,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:41,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:41,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:41,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:41,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:11:41,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:41,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:41,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:41,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:41,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:41,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:11:41,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727246357] [2020-10-14 18:11:41,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:41,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:11:41,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628242221] [2020-10-14 18:11:41,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:11:41,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:41,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:11:41,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:11:41,884 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 8 states. [2020-10-14 18:11:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:42,146 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-14 18:11:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:11:42,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-14 18:11:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:42,148 INFO L225 Difference]: With dead ends: 99 [2020-10-14 18:11:42,148 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:11:42,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:11:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:11:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-14 18:11:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:11:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-14 18:11:42,174 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 35 [2020-10-14 18:11:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:42,174 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-14 18:11:42,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:11:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-14 18:11:42,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 18:11:42,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:42,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:42,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:11:42,179 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash -325598710, now seen corresponding path program 4 times [2020-10-14 18:11:42,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:42,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73846585] [2020-10-14 18:11:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:42,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:42,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:42,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:42,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:42,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:43,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:44,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:44,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 18:11:44,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:11:44,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1900 [2020-10-14 18:11:44,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:44,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:44,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:11:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:11:44,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:11:44,814 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 26 [2020-10-14 18:11:45,726 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 40 [2020-10-14 18:11:46,158 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 47 [2020-10-14 18:11:46,879 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 22 [2020-10-14 18:11:46,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:46,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:46,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:46,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:46,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:46,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:46,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:46,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:46,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:46,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:46,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:46,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:46,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:46,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:46,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:46,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:46,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:46,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:46,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:46,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:11:46,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73846585] [2020-10-14 18:11:46,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:46,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:11:46,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384834543] [2020-10-14 18:11:46,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:11:46,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:11:46,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:11:46,959 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 11 states. [2020-10-14 18:11:47,437 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2020-10-14 18:11:47,575 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-14 18:11:47,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:47,803 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-14 18:11:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:11:47,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-14 18:11:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:47,809 INFO L225 Difference]: With dead ends: 88 [2020-10-14 18:11:47,810 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 18:11:47,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:11:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 18:11:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2020-10-14 18:11:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 18:11:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-14 18:11:47,821 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 35 [2020-10-14 18:11:47,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:47,821 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-14 18:11:47,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:11:47,821 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-14 18:11:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 18:11:47,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:47,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:47,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:11:47,823 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1468226466, now seen corresponding path program 1 times [2020-10-14 18:11:47,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:47,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409718771] [2020-10-14 18:11:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:47,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:47,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:48,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:48,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:11:48,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:11:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-14 18:11:48,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:48,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:11:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:48,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:11:48,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:48,855 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 17 [2020-10-14 18:11:48,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:48,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:48,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:48,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:48,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:11:48,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:48,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:48,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:48,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:48,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:48,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:48,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:48,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:48,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:48,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:48,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:48,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:48,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:48,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:48,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 18:11:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:48,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:48,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:48,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:48,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:48,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 18:11:48,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:48,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:48,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:48,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:48,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:48,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409718771] [2020-10-14 18:11:48,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:48,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:11:48,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929633794] [2020-10-14 18:11:48,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:11:48,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:48,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:11:48,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:11:48,968 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 13 states. [2020-10-14 18:11:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:50,157 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-14 18:11:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:11:50,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-14 18:11:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:50,159 INFO L225 Difference]: With dead ends: 96 [2020-10-14 18:11:50,160 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 18:11:50,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:11:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 18:11:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2020-10-14 18:11:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:11:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-14 18:11:50,177 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 40 [2020-10-14 18:11:50,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:50,177 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-14 18:11:50,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:11:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-14 18:11:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 18:11:50,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:50,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:50,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:11:50,180 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:50,180 INFO L82 PathProgramCache]: Analyzing trace with hash -937769886, now seen corresponding path program 2 times [2020-10-14 18:11:50,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:50,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140532740] [2020-10-14 18:11:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:50,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:51,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:51,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:51,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:51,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:53,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:55,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:55,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:11:55,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 18:11:55,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:11:55,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:55,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:11:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:11:55,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:55,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:55,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:55,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:55,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:55,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:55,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:55,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:55,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:55,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:55,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:55,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:55,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:55,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:55,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:55,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:55,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:55,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:55,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:55,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:55,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:55,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:55,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:55,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:55,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:55,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 18:11:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:55,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:55,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:55,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:55,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:55,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:11:55,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:55,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:55,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:11:55,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:55,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:11:55,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:11:55,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140532740] [2020-10-14 18:11:55,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:55,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:11:55,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230618075] [2020-10-14 18:11:55,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:11:55,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:55,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:11:55,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:11:55,517 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 10 states. [2020-10-14 18:11:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:56,208 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2020-10-14 18:11:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:11:56,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-14 18:11:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:56,211 INFO L225 Difference]: With dead ends: 140 [2020-10-14 18:11:56,211 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 18:11:56,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:11:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 18:11:56,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2020-10-14 18:11:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 18:11:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-10-14 18:11:56,231 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 40 [2020-10-14 18:11:56,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:56,232 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-10-14 18:11:56,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:11:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-10-14 18:11:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:11:56,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:56,233 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:56,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:11:56,233 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:56,233 INFO L82 PathProgramCache]: Analyzing trace with hash 465630752, now seen corresponding path program 3 times [2020-10-14 18:11:56,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:56,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558796622] [2020-10-14 18:11:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:56,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:56,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:58,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:59,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:00,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:00,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:12:00,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:12:00,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4142 [2020-10-14 18:12:00,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:00,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:00,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:12:00,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:00,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:12:00,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:01,465 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 26 [2020-10-14 18:12:01,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:01,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:01,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:01,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:01,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:01,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:01,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:01,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:01,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:01,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:01,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:01,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:01,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:01,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:01,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:01,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:01,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:01,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 18:12:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:01,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:01,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:01,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:01,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:01,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:12:01,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:01,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:01,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:01,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558796622] [2020-10-14 18:12:01,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:01,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:12:01,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291864896] [2020-10-14 18:12:01,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:12:01,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:01,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:12:01,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:12:01,574 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 15 states. [2020-10-14 18:12:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:02,495 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-10-14 18:12:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:12:02,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-14 18:12:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:02,498 INFO L225 Difference]: With dead ends: 102 [2020-10-14 18:12:02,498 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 18:12:02,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:12:02,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 18:12:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2020-10-14 18:12:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 18:12:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-10-14 18:12:02,512 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 42 [2020-10-14 18:12:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:02,513 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-10-14 18:12:02,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:12:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-10-14 18:12:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 18:12:02,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:02,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:02,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:12:02,514 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1515868196, now seen corresponding path program 4 times [2020-10-14 18:12:02,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:02,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750101739] [2020-10-14 18:12:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:02,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:02,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:02,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:03,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:03,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:03,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:04,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:04,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:05,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:06,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:06,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 18:12:06,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:12:06,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3808 [2020-10-14 18:12:06,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:06,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:12:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:12:06,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:06,987 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 27 [2020-10-14 18:12:07,131 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 27 [2020-10-14 18:12:07,346 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 19 [2020-10-14 18:12:07,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:07,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:07,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:07,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:07,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:07,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:07,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:07,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:07,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:07,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:07,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:07,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:07,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:07,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:07,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:07,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:07,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:07,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:07,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:07,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:07,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:07,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:12:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:07,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:07,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:07,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:07,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:07,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:07,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:07,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:07,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:07,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:07,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:07,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:07,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750101739] [2020-10-14 18:12:07,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:07,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:12:07,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880528974] [2020-10-14 18:12:07,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:12:07,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:07,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:12:07,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:12:07,438 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 17 states. [2020-10-14 18:12:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:08,298 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2020-10-14 18:12:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:12:08,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-14 18:12:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:08,305 INFO L225 Difference]: With dead ends: 120 [2020-10-14 18:12:08,305 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 18:12:08,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:12:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 18:12:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 91. [2020-10-14 18:12:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 18:12:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-10-14 18:12:08,323 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 45 [2020-10-14 18:12:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:08,324 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-10-14 18:12:08,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:12:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-10-14 18:12:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:12:08,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:08,325 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:08,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:12:08,325 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash 906091234, now seen corresponding path program 2 times [2020-10-14 18:12:08,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:08,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640296976] [2020-10-14 18:12:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:08,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:08,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:08,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:09,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:09,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:12:09,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:12:09,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-10-14 18:12:09,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:09,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:12:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:09,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:12:09,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:09,608 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 25 [2020-10-14 18:12:09,941 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 30 [2020-10-14 18:12:10,214 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 27 [2020-10-14 18:12:10,571 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 18 [2020-10-14 18:12:10,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:10,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:10,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:10,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:10,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:10,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:10,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:10,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:10,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:10,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:10,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:10,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:10,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:10,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:10,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:10,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:10,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:10,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:10,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:10,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:10,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:10,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:10,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:10,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:10,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 18:12:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:10,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:10,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:10,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:10,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:10,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:12:10,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:10,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:10,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:10,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640296976] [2020-10-14 18:12:10,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:10,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:12:10,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196788952] [2020-10-14 18:12:10,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:12:10,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:10,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:12:10,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:12:10,671 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 15 states. [2020-10-14 18:12:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:12,635 INFO L93 Difference]: Finished difference Result 155 states and 177 transitions. [2020-10-14 18:12:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:12:12,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-14 18:12:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:12,639 INFO L225 Difference]: With dead ends: 155 [2020-10-14 18:12:12,639 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 18:12:12,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:12:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 18:12:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-10-14 18:12:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:12:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-14 18:12:12,668 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 46 [2020-10-14 18:12:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:12,668 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-14 18:12:12,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:12:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-14 18:12:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:12:12,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:12,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:12,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:12:12,670 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash 990750968, now seen corresponding path program 3 times [2020-10-14 18:12:12,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:12,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434465602] [2020-10-14 18:12:12,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:12,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:12,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:13,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:13,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 18:12:13,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:12:13,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-14 18:12:13,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:13,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:13,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:12:13,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:13,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:12:13,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:13,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:13,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:13,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:13,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:13,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:13,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:13,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:13,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:13,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:13,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:13,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:13,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:13,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:13,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:13,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:13,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:13,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:13,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:13,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:13,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:13,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:13,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:13,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:13,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:13,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 18:12:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:13,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:13,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:13,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:13,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:13,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:13,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:13,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:13,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:13,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:13,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:13,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:13,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-14 18:12:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:13,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:13,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:13,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:13,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:13,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:13,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:13,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:13,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:13,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:13,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:13,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 18:12:13,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434465602] [2020-10-14 18:12:13,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:13,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:12:13,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743375671] [2020-10-14 18:12:13,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:12:13,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:12:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:12:13,317 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 10 states. [2020-10-14 18:12:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:13,672 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2020-10-14 18:12:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:12:13,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-14 18:12:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:13,675 INFO L225 Difference]: With dead ends: 144 [2020-10-14 18:12:13,675 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 18:12:13,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:12:13,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 18:12:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-14 18:12:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:12:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2020-10-14 18:12:13,701 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 48 [2020-10-14 18:12:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:13,701 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2020-10-14 18:12:13,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:12:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2020-10-14 18:12:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:12:13,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:13,704 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:13,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:12:13,704 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:13,705 INFO L82 PathProgramCache]: Analyzing trace with hash 302811040, now seen corresponding path program 5 times [2020-10-14 18:12:13,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:13,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77746023] [2020-10-14 18:12:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:13,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:13,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:13,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:13,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:13,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:14,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:14,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:14,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:14,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:15,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:15,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 18:12:18,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:12:18,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:12:18,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:12:18,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:18,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:12:18,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:19,405 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 27 [2020-10-14 18:12:19,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:19,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:19,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:19,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:19,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:19,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:19,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:19,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:19,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:19,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:19,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:19,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:19,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:19,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:19,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-14 18:12:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:19,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:19,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:19,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:19,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:19,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77746023] [2020-10-14 18:12:19,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:19,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:12:19,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686834845] [2020-10-14 18:12:19,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:12:19,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:19,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:12:19,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:12:19,600 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 17 states. [2020-10-14 18:12:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:20,295 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2020-10-14 18:12:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:12:20,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-14 18:12:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:20,298 INFO L225 Difference]: With dead ends: 103 [2020-10-14 18:12:20,298 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 18:12:20,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:12:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 18:12:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 64. [2020-10-14 18:12:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 18:12:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-14 18:12:20,321 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 48 [2020-10-14 18:12:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:20,322 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-14 18:12:20,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:12:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-14 18:12:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:12:20,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:20,323 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:20,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:12:20,323 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2023539256, now seen corresponding path program 4 times [2020-10-14 18:12:20,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:20,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738126629] [2020-10-14 18:12:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:20,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:21,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:21,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:21,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:21,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:21,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:21,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:21,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:23,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:25,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:12:25,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 18:12:25,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:12:25,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:25,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:25,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:12:25,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:25,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:12:25,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:25,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:25,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:25,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:25,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:25,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:25,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:25,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:25,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:25,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:25,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:25,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:25,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:25,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:25,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:25,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:25,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:25,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:25,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:25,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:25,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:25,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:25,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:12:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:25,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:25,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:25,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:25,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:25,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:25,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:25,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:25,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:12:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:25,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:25,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:25,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:25,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:12:25,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:25,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:25,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:25,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:25,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:25,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 18:12:25,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738126629] [2020-10-14 18:12:25,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:25,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:12:25,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846474207] [2020-10-14 18:12:25,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:12:25,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:12:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:12:25,708 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2020-10-14 18:12:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:26,358 INFO L93 Difference]: Finished difference Result 162 states and 175 transitions. [2020-10-14 18:12:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:12:26,358 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-14 18:12:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:26,360 INFO L225 Difference]: With dead ends: 162 [2020-10-14 18:12:26,360 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 18:12:26,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:12:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 18:12:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 69. [2020-10-14 18:12:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 18:12:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-14 18:12:26,374 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 53 [2020-10-14 18:12:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:26,375 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-14 18:12:26,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:12:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-14 18:12:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:12:26,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:26,376 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:26,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:12:26,376 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1938752646, now seen corresponding path program 6 times [2020-10-14 18:12:26,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:26,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380105140] [2020-10-14 18:12:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:26,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:28,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:28,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:28,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:31,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:31,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:31,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:12:31,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 18:12:31,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:12:31,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:31,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:31,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:12:31,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:31,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:12:31,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:31,742 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 28 [2020-10-14 18:12:31,890 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 27 [2020-10-14 18:12:32,026 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 27 [2020-10-14 18:12:32,639 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 26 [2020-10-14 18:12:32,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:32,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:32,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:32,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:32,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:32,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:32,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:32,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:32,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:32,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:32,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:32,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:32,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:32,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:32,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:32,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:12:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:32,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:32,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:32,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:32,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:12:32,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:32,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:32,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:32,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:32,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:12:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:32,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:32,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:32,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:32,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:32,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:32,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:32,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:32,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:32,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:32,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:12:32,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380105140] [2020-10-14 18:12:32,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:32,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:12:32,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174689673] [2020-10-14 18:12:32,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:12:32,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:32,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:12:32,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:12:32,761 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 17 states. [2020-10-14 18:12:33,650 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-14 18:12:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:33,915 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-10-14 18:12:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:12:33,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-14 18:12:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:33,917 INFO L225 Difference]: With dead ends: 104 [2020-10-14 18:12:33,917 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 18:12:33,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:12:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 18:12:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-14 18:12:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 18:12:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-10-14 18:12:33,934 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 53 [2020-10-14 18:12:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:33,935 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-10-14 18:12:33,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:12:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-10-14 18:12:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:12:33,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:33,936 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:33,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:12:33,936 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:33,937 INFO L82 PathProgramCache]: Analyzing trace with hash -655764166, now seen corresponding path program 5 times [2020-10-14 18:12:33,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:33,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094730] [2020-10-14 18:12:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:33,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:33,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:33,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:36,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:36,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:12:36,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:12:36,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2581 [2020-10-14 18:12:36,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:36,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:12:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:12:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:36,850 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-14 18:12:37,093 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 24 [2020-10-14 18:12:37,335 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 27 [2020-10-14 18:12:37,717 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 39 [2020-10-14 18:12:37,993 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 26 [2020-10-14 18:12:38,541 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 28 [2020-10-14 18:12:38,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:38,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:38,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:38,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:38,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:38,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:38,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:38,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:38,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:38,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:38,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:38,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:38,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:38,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:38,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:38,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:38,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:38,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:38,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:38,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:38,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:38,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 18:12:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:38,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:38,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:38,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:38,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:38,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:12:38,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:38,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:38,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:38,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:12:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:38,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:38,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:38,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:38,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:12:38,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:38,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:38,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:38,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:12:38,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094730] [2020-10-14 18:12:38,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:38,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:12:38,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265825362] [2020-10-14 18:12:38,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:12:38,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:38,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:12:38,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:12:38,671 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 16 states. [2020-10-14 18:12:39,640 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 22 [2020-10-14 18:12:40,127 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-14 18:12:40,845 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-14 18:12:41,215 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-14 18:12:41,492 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-10-14 18:12:41,671 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-14 18:12:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:41,958 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2020-10-14 18:12:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:12:41,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-14 18:12:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:41,962 INFO L225 Difference]: With dead ends: 157 [2020-10-14 18:12:41,962 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 18:12:41,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:12:41,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 18:12:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 87. [2020-10-14 18:12:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 18:12:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-10-14 18:12:41,982 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 55 [2020-10-14 18:12:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:41,983 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-10-14 18:12:41,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:12:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-10-14 18:12:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:12:41,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:41,983 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:41,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:12:41,984 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:41,984 INFO L82 PathProgramCache]: Analyzing trace with hash -148769034, now seen corresponding path program 7 times [2020-10-14 18:12:41,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:41,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372710263] [2020-10-14 18:12:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:41,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:43,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:43,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:45,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:45,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:45,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:46,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:46,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:46,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:46,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:46,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:12:46,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:12:46,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:12:46,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:46,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:12:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:12:46,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:48,530 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 18 [2020-10-14 18:12:48,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:48,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:48,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:48,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:48,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:48,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:48,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:48,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:48,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:48,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:48,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:48,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:48,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:48,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:48,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:48,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:48,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:48,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:48,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:48,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:48,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:48,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-14 18:12:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:48,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:48,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:48,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:48,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:12:48,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:48,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:48,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:48,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-14 18:12:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:48,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:48,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:48,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:48,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:12:48,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:48,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:12:48,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372710263] [2020-10-14 18:12:48,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:48,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:12:48,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669901194] [2020-10-14 18:12:48,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:12:48,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:12:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:12:48,662 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 20 states. [2020-10-14 18:12:50,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:50,160 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2020-10-14 18:12:50,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:12:50,161 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-10-14 18:12:50,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:50,163 INFO L225 Difference]: With dead ends: 141 [2020-10-14 18:12:50,163 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 18:12:50,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:12:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 18:12:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 90. [2020-10-14 18:12:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 18:12:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-14 18:12:50,185 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 56 [2020-10-14 18:12:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:50,186 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-14 18:12:50,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:12:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-14 18:12:50,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:12:50,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:50,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:50,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:12:50,187 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:50,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1060931078, now seen corresponding path program 8 times [2020-10-14 18:12:50,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:50,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456323834] [2020-10-14 18:12:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:50,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:50,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:50,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:50,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:50,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:51,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:51,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:52,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:52,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:55,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:55,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:12:55,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:12:55,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:12:55,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:55,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:55,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:12:55,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:55,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:12:55,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:56,377 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 19 [2020-10-14 18:12:56,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:56,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:56,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:56,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:56,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:56,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:56,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:56,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:56,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:56,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:56,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:56,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:56,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:56,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:56,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:56,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:56,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:56,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:56,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:56,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:56,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:56,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:56,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-14 18:12:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:56,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:56,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:56,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:56,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:56,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:56,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:56,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:56,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:56,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:56,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:56,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:56,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 18:12:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:56,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:56,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:56,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:56,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:56,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:56,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:56,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:56,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:12:56,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456323834] [2020-10-14 18:12:56,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:56,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:12:56,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329193846] [2020-10-14 18:12:56,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:12:56,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:56,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:12:56,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:12:56,519 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 21 states. [2020-10-14 18:12:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:57,939 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2020-10-14 18:12:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:12:57,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-14 18:12:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:57,942 INFO L225 Difference]: With dead ends: 125 [2020-10-14 18:12:57,943 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 18:12:57,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:12:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 18:12:57,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 77. [2020-10-14 18:12:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:12:57,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-14 18:12:57,964 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 59 [2020-10-14 18:12:57,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:57,965 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-14 18:12:57,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:12:57,965 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-14 18:12:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 18:12:57,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:57,965 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:57,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:12:57,966 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:57,966 INFO L82 PathProgramCache]: Analyzing trace with hash -844500784, now seen corresponding path program 9 times [2020-10-14 18:12:57,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:57,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557130516] [2020-10-14 18:12:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:57,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:00,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:02,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:02,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:02,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:02,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:13:02,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:13:02,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:13:02,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:02,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:02,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:13:02,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:02,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 18:13:02,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:03,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:03,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:03,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:03,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:03,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:03,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:03,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:03,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:03,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:03,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:03,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:03,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:03,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:03,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:03,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:03,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:03,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:03,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:03,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:03,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:03,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:03,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:13:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:03,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:03,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:03,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:03,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:03,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:13:03,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:03,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:03,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:03,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:03,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:03,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:03,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:13:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:03,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:03,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:03,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:03,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:03,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:03,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:03,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:03,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:03,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:03,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:03,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:13:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:03,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:03,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:03,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:03,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:03,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:03,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:03,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:03,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 18:13:03,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557130516] [2020-10-14 18:13:03,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:03,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:13:03,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713630177] [2020-10-14 18:13:03,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:13:03,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:03,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:13:03,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:13:03,125 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 12 states. [2020-10-14 18:13:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:03,607 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2020-10-14 18:13:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:13:03,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-14 18:13:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:03,612 INFO L225 Difference]: With dead ends: 164 [2020-10-14 18:13:03,613 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 18:13:03,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:13:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 18:13:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-14 18:13:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 18:13:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-14 18:13:03,632 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 61 [2020-10-14 18:13:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:03,633 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-14 18:13:03,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:13:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-14 18:13:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:13:03,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:03,634 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:03,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:13:03,634 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:03,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:03,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1986541942, now seen corresponding path program 6 times [2020-10-14 18:13:03,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:03,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675687305] [2020-10-14 18:13:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:03,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:03,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:04,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:04,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:13:04,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:13:04,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-14 18:13:04,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:04,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:13:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 18:13:04,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:05,287 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 14 [2020-10-14 18:13:05,417 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2020-10-14 18:13:06,318 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 10 [2020-10-14 18:13:06,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:06,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:06,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:06,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:06,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:06,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:06,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:06,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:06,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:06,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:06,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:06,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:06,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:06,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:06,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:06,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:06,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:06,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:06,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:06,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:06,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:06,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:06,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:06,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:06,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 18:13:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:06,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:06,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:06,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:06,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:06,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:13:06,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:06,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:06,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:06,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:13:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:06,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:06,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:06,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:06,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:06,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:13:06,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:06,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:06,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:06,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:06,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:06,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:06,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 18:13:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:06,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:06,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:06,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:06,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:06,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:13:06,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:06,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:06,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:06,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:06,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:06,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:13:06,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675687305] [2020-10-14 18:13:06,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:06,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:13:06,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25603653] [2020-10-14 18:13:06,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:13:06,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:13:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:13:06,476 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 19 states. [2020-10-14 18:13:10,407 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-14 18:13:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:10,698 INFO L93 Difference]: Finished difference Result 192 states and 220 transitions. [2020-10-14 18:13:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 18:13:10,699 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-10-14 18:13:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:10,701 INFO L225 Difference]: With dead ends: 192 [2020-10-14 18:13:10,701 INFO L226 Difference]: Without dead ends: 190 [2020-10-14 18:13:10,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=374, Invalid=2382, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 18:13:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-14 18:13:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 111. [2020-10-14 18:13:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 18:13:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2020-10-14 18:13:10,731 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 66 [2020-10-14 18:13:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:10,732 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2020-10-14 18:13:10,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:13:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2020-10-14 18:13:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:13:10,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:10,733 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:10,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:13:10,734 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:10,734 INFO L82 PathProgramCache]: Analyzing trace with hash 244451338, now seen corresponding path program 10 times [2020-10-14 18:13:10,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:10,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835373252] [2020-10-14 18:13:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:12,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:12,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:12,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:12,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:12,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:14,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:15,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:15,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:13:15,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-14 18:13:15,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:13:15,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:15,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:13:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 18:13:15,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:16,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:16,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:16,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:16,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:16,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:16,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:16,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:16,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:16,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:16,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:16,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:16,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:16,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:16,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:16,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:16,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:16,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:16,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:16,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:16,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:16,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:16,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:16,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:16,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:16,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 18:13:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:16,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:16,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:16,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:16,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:16,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:16,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:16,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:16,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:16,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:13:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:16,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:16,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:16,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:16,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:16,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:16,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:16,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:16,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:16,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:16,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:16,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:16,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 18:13:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:16,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:16,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:16,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:16,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:13:16,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:16,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:16,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:13:16,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:13:16,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:16,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:13:17,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835373252] [2020-10-14 18:13:17,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:17,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:13:17,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061841777] [2020-10-14 18:13:17,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:13:17,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:13:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:13:17,038 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 24 states. [2020-10-14 18:13:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:18,735 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-10-14 18:13:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:13:18,736 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-10-14 18:13:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:18,737 INFO L225 Difference]: With dead ends: 138 [2020-10-14 18:13:18,737 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 18:13:18,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:13:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 18:13:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-10-14 18:13:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 18:13:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2020-10-14 18:13:18,765 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 66 [2020-10-14 18:13:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:18,765 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2020-10-14 18:13:18,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:13:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2020-10-14 18:13:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:13:18,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:18,766 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:18,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:13:18,766 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1292069166, now seen corresponding path program 11 times [2020-10-14 18:13:18,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:18,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983088700] [2020-10-14 18:13:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:18,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:18,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:18,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:18,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:18,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:18,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:19,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:22,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:23,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:23,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:23,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:13:23,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 18:13:23,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:13:23,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:23,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:23,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:13:23,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:23,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 18:13:23,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:24,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:24,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:24,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:24,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:24,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:24,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:24,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:24,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:24,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:24,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:24,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:24,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:24,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:24,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:24,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:24,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:24,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:24,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:24,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:13:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:24,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:24,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:24,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:24,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:24,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:24,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:24,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:24,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:24,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:13:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:24,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:24,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:24,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:24,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:24,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:24,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:24,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:24,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:24,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-14 18:13:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:24,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:24,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:24,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:24,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:24,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:24,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:24,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:24,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-14 18:13:24,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983088700] [2020-10-14 18:13:24,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:24,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:13:24,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230360472] [2020-10-14 18:13:24,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:13:24,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:24,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:13:24,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:13:24,414 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand 14 states. [2020-10-14 18:13:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:25,625 INFO L93 Difference]: Finished difference Result 260 states and 284 transitions. [2020-10-14 18:13:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:13:25,626 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-10-14 18:13:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:25,629 INFO L225 Difference]: With dead ends: 260 [2020-10-14 18:13:25,629 INFO L226 Difference]: Without dead ends: 210 [2020-10-14 18:13:25,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:13:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-14 18:13:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 119. [2020-10-14 18:13:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 18:13:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2020-10-14 18:13:25,660 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 69 [2020-10-14 18:13:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:25,661 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2020-10-14 18:13:25,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:13:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2020-10-14 18:13:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:13:25,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:25,662 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:25,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:13:25,662 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash 370632148, now seen corresponding path program 12 times [2020-10-14 18:13:25,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:25,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893584200] [2020-10-14 18:13:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:25,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:25,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:26,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:26,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:27,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:27,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:27,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:27,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:28,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:29,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:30,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:30,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 18:13:30,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:13:30,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:13:30,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:30,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:13:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:13:30,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:31,084 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 24 [2020-10-14 18:13:31,226 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2020-10-14 18:13:31,495 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 24 [2020-10-14 18:13:32,119 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 14 [2020-10-14 18:13:32,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:32,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:32,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:32,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:32,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:32,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:32,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:32,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:32,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:32,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:32,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:32,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:32,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:32,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:32,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:32,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:32,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:32,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:13:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:32,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:32,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:32,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:32,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:32,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:32,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:32,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:32,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:32,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:32,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:32,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 18:13:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:32,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:32,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:32,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:32,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:32,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:32,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:32,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:32,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:32,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:32,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:32,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:13:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:32,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:32,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:32,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:32,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:32,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:32,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:32,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:13:32,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893584200] [2020-10-14 18:13:32,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:32,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:13:32,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71098964] [2020-10-14 18:13:32,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:13:32,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:32,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:13:32,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:13:32,268 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 22 states. [2020-10-14 18:13:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:33,710 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2020-10-14 18:13:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:13:33,711 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 71 [2020-10-14 18:13:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:33,713 INFO L225 Difference]: With dead ends: 160 [2020-10-14 18:13:33,713 INFO L226 Difference]: Without dead ends: 158 [2020-10-14 18:13:33,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:13:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-14 18:13:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 122. [2020-10-14 18:13:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 18:13:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2020-10-14 18:13:33,744 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 71 [2020-10-14 18:13:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:33,744 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2020-10-14 18:13:33,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:13:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2020-10-14 18:13:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:13:33,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:33,748 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:33,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:13:33,748 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:33,748 INFO L82 PathProgramCache]: Analyzing trace with hash -853759008, now seen corresponding path program 7 times [2020-10-14 18:13:33,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:33,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479877467] [2020-10-14 18:13:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:33,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:33,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 18:13:35,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:13:35,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1893 [2020-10-14 18:13:35,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:13:35,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 18:13:35,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:13:35,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:35,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:35,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:35,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:35,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:35,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:35,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:35,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:35,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:35,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:35,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:35,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:35,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:35,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:35,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:35,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 18:13:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:35,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:35,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:35,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:13:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:35,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:35,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:35,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:13:35,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:35,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:35,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:35,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 18:13:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:35,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:35,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:13:35,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:35,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:35,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-14 18:13:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:35,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:35,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:35,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:35,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:35,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:13:35,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:35,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:35,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-14 18:13:35,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479877467] [2020-10-14 18:13:35,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:35,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:13:35,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186518908] [2020-10-14 18:13:35,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:13:35,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:13:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:13:35,818 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand 14 states. [2020-10-14 18:13:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:36,407 INFO L93 Difference]: Finished difference Result 242 states and 265 transitions. [2020-10-14 18:13:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:13:36,409 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-14 18:13:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:36,410 INFO L225 Difference]: With dead ends: 242 [2020-10-14 18:13:36,410 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 18:13:36,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:13:36,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 18:13:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2020-10-14 18:13:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 18:13:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2020-10-14 18:13:36,447 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 74 [2020-10-14 18:13:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:36,448 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2020-10-14 18:13:36,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:13:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2020-10-14 18:13:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:13:36,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:36,453 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:36,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:13:36,453 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:36,454 INFO L82 PathProgramCache]: Analyzing trace with hash -335942456, now seen corresponding path program 13 times [2020-10-14 18:13:36,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:36,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962913251] [2020-10-14 18:13:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:36,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:36,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:37,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:37,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:37,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:37,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:38,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:38,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:39,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:39,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:40,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:40,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:41,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:41,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:41,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 18:13:41,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 18:13:41,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:13:41,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:41,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:41,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:13:41,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:41,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:13:41,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:43,334 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-14 18:13:43,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:43,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:43,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:43,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:43,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:43,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:43,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:43,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:43,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:43,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:43,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:43,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:43,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:43,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:43,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:43,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:43,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:43,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:43,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:43,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:43,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:13:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:43,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:43,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:43,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:43,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:43,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:43,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:43,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:43,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:43,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 18:13:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:43,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:43,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:43,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:43,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:43,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:13:43,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:43,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:13:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:13:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:43,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:43,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-14 18:13:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:43,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:43,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:43,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:43,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:43,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:43,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:43,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:43,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:43,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:13:43,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:43,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 18:13:43,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962913251] [2020-10-14 18:13:43,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:43,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:13:43,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207107708] [2020-10-14 18:13:43,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:13:43,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:13:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:13:43,510 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 29 states. [2020-10-14 18:13:44,244 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2020-10-14 18:13:44,565 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-14 18:13:45,340 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2020-10-14 18:13:45,890 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-14 18:13:46,482 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-14 18:13:46,745 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-14 18:13:47,047 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-14 18:13:47,306 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2020-10-14 18:13:47,620 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-14 18:13:48,398 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2020-10-14 18:13:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:48,429 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2020-10-14 18:13:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 18:13:48,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 74 [2020-10-14 18:13:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:48,431 INFO L225 Difference]: With dead ends: 226 [2020-10-14 18:13:48,432 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 18:13:48,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=497, Invalid=3285, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 18:13:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 18:13:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-14 18:13:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-14 18:13:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2020-10-14 18:13:48,471 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 74 [2020-10-14 18:13:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:48,472 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2020-10-14 18:13:48,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:13:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2020-10-14 18:13:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:13:48,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:48,473 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:48,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:13:48,473 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:48,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1481494778, now seen corresponding path program 14 times [2020-10-14 18:13:48,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:48,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445840856] [2020-10-14 18:13:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:48,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:48,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:48,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:49,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:49,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:49,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:49,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:49,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:49,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:49,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:50,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:51,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:51,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:51,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:51,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:52,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:52,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:52,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:53,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:53,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 18:13:53,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-14 18:13:53,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:13:53,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:53,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:53,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:13:53,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:53,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 18:13:53,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:54,053 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-10-14 18:13:55,341 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 27 [2020-10-14 18:13:55,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:55,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:55,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:55,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:55,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:55,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:55,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:55,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:55,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:55,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:55,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:55,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:55,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:55,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:55,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:55,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:55,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:55,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:55,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:55,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:55,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-14 18:13:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:55,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:55,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:55,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:13:55,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:55,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:55,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-14 18:13:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:55,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:55,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:55,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:55,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:55,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:13:55,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:55,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:55,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:55,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-14 18:13:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:55,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:55,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:55,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:55,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:55,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 18:13:55,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:55,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:13:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:13:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 26 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:13:55,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445840856] [2020-10-14 18:13:55,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:55,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:13:55,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419191873] [2020-10-14 18:13:55,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:13:55,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:55,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:13:55,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:13:55,536 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand 26 states. [2020-10-14 18:13:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:57,965 INFO L93 Difference]: Finished difference Result 190 states and 209 transitions. [2020-10-14 18:13:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:13:57,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 76 [2020-10-14 18:13:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:57,968 INFO L225 Difference]: With dead ends: 190 [2020-10-14 18:13:57,968 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 18:13:57,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:13:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 18:13:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 141. [2020-10-14 18:13:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 18:13:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2020-10-14 18:13:58,005 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 76 [2020-10-14 18:13:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:58,005 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2020-10-14 18:13:58,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:13:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2020-10-14 18:13:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 18:13:58,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:58,006 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:58,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:13:58,007 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:58,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:58,007 INFO L82 PathProgramCache]: Analyzing trace with hash -950705878, now seen corresponding path program 15 times [2020-10-14 18:13:58,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:58,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916880197] [2020-10-14 18:13:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:58,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:58,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:58,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:58,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:59,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:59,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:59,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:02,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:02,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:03,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:03,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 18:14:03,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:14:03,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:14:03,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:03,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:03,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:14:03,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:03,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 18:14:03,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:03,750 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2020-10-14 18:14:03,908 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2020-10-14 18:14:04,064 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2020-10-14 18:14:04,377 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2020-10-14 18:14:04,641 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 17 [2020-10-14 18:14:04,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:04,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:04,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:04,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:04,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:04,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:04,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:04,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:04,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:04,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:04,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:04,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:04,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:04,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:04,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:04,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:04,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:04,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:14:04,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:04,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:04,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:04,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:04,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:04,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:04,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:14:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:04,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:04,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:04,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:04,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:14:04,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:04,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:04,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:14:04,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:04,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:14:04,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:04,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 18:14:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:04,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:04,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:04,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:04,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:04,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:14:04,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:04,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:04,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:14:04,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:04,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:14:04,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:04,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:14:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:04,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:04,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:04,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:04,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:04,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:14:04,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:04,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:14:04,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:04,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:14:04,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:04,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-14 18:14:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:04,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:04,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:04,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:04,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:14:04,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:04,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:14:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:14:04,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 92 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 18:14:04,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916880197] [2020-10-14 18:14:04,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:04,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:14:04,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727860944] [2020-10-14 18:14:04,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:14:04,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:04,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:14:04,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:14:04,834 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 23 states. [2020-10-14 18:14:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:07,097 INFO L93 Difference]: Finished difference Result 186 states and 204 transitions. [2020-10-14 18:14:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:14:07,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 79 [2020-10-14 18:14:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:07,101 INFO L225 Difference]: With dead ends: 186 [2020-10-14 18:14:07,101 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 18:14:07,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:14:07,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 18:14:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 164. [2020-10-14 18:14:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-14 18:14:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2020-10-14 18:14:07,159 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 79 [2020-10-14 18:14:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:07,159 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2020-10-14 18:14:07,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:14:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2020-10-14 18:14:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 18:14:07,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:07,161 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:14:07,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:14:07,161 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash 395656790, now seen corresponding path program 16 times [2020-10-14 18:14:07,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:07,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829717054] [2020-10-14 18:14:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:07,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:07,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:08,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:08,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:08,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:10,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:11,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:12,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:12,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 18:14:12,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:14:12,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:14:12,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:12,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:12,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:14:12,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 18:14:12,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 18:14:12,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:12,547 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-14 18:14:12,769 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-10-14 18:14:12,977 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-14 18:14:13,285 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-14 18:14:13,506 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2020-10-14 18:14:13,781 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2020-10-14 18:14:14,006 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-14 18:14:14,304 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2020-10-14 18:14:15,268 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2020-10-14 18:14:15,445 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2020-10-14 18:14:15,632 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2020-10-14 18:14:15,816 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2020-10-14 18:14:16,084 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 18 [2020-10-14 18:14:16,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:16,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:16,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:16,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:16,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:16,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:16,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:16,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:16,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:16,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:16,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:16,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:16,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:16,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:16,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:16,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:16,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:16,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:16,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 18:14:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:16,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:16,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:16,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:16,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:16,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:14:16,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:16,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:14:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:14:16,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:16,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:14:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:16,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:16,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:16,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:16,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:16,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:14:16,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:16,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:14:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:16,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:14:16,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:16,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-14 18:14:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:16,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:16,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:16,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:16,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:16,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:14:16,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:16,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:16,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:14:16,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:16,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:14:16,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:14:16,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829717054] [2020-10-14 18:14:16,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:16,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:14:16,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951066851] [2020-10-14 18:14:16,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:14:16,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:16,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:14:16,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:14:16,350 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand 28 states. [2020-10-14 18:14:16,594 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-14 18:14:16,995 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-14 18:14:17,231 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-14 18:14:17,428 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-14 18:14:17,639 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-14 18:14:17,957 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-14 18:14:18,337 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-14 18:14:18,824 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-10-14 18:14:19,077 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-14 18:14:19,299 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-14 18:14:19,553 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-14 18:14:19,748 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-14 18:14:20,029 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-14 18:14:20,250 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-14 18:14:20,515 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-14 18:14:20,749 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-14 18:14:21,099 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-14 18:14:21,319 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-14 18:14:21,659 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-14 18:14:22,017 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-14 18:14:22,578 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-10-14 18:14:22,908 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-10-14 18:14:23,619 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-14 18:14:23,948 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-14 18:14:25,029 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-14 18:14:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:25,763 INFO L93 Difference]: Finished difference Result 228 states and 252 transitions. [2020-10-14 18:14:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 18:14:25,765 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-10-14 18:14:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:25,767 INFO L225 Difference]: With dead ends: 228 [2020-10-14 18:14:25,767 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 18:14:25,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=406, Invalid=3500, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 18:14:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 18:14:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 169. [2020-10-14 18:14:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-14 18:14:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 184 transitions. [2020-10-14 18:14:25,826 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 184 transitions. Word has length 79 [2020-10-14 18:14:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:25,826 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 184 transitions. [2020-10-14 18:14:25,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:14:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 184 transitions. [2020-10-14 18:14:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 18:14:25,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:25,828 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:14:25,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:14:25,828 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1124536648, now seen corresponding path program 17 times [2020-10-14 18:14:25,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:25,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354735077] [2020-10-14 18:14:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:25,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:25,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:26,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:26,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:28,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:30,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:30,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:30,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 18:14:30,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:14:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:14:30,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:30,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:14:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 18:14:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:32,178 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 27 [2020-10-14 18:14:32,374 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2020-10-14 18:14:32,637 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-10-14 18:14:32,828 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-10-14 18:14:33,034 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-14 18:14:33,322 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2020-10-14 18:14:33,564 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-10-14 18:14:33,799 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-14 18:14:34,005 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2020-10-14 18:14:34,785 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 27 [2020-10-14 18:14:34,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:34,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:34,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:34,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:34,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:34,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:34,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:34,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:34,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:34,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:34,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:34,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:34,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:34,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:34,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:34,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:34,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:34,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:14:34,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:34,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:34,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:34,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:34,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:34,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:34,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-14 18:14:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:34,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:34,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:34,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:34,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:14:34,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:34,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:14:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:14:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:14:34,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:34,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-14 18:14:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:34,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:34,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:34,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:34,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:34,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:34,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:34,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:14:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:34,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:34,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-14 18:14:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:34,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:34,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:34,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:34,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:34,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:34,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:34,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:14:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:34,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 123 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 18:14:35,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354735077] [2020-10-14 18:14:35,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:35,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:14:35,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888825156] [2020-10-14 18:14:35,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:14:35,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:14:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:14:35,015 INFO L87 Difference]: Start difference. First operand 169 states and 184 transitions. Second operand 31 states. [2020-10-14 18:14:36,516 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 50 [2020-10-14 18:14:37,125 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-10-14 18:14:37,686 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 42 [2020-10-14 18:14:38,025 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 40 [2020-10-14 18:14:38,417 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 70 [2020-10-14 18:14:38,836 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-14 18:14:39,284 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-10-14 18:14:39,761 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-14 18:14:40,212 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-14 18:14:40,567 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-14 18:14:40,961 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-14 18:14:42,299 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-10-14 18:14:42,648 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-14 18:14:43,091 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 64 [2020-10-14 18:14:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:43,227 INFO L93 Difference]: Finished difference Result 205 states and 223 transitions. [2020-10-14 18:14:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:14:43,234 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 80 [2020-10-14 18:14:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:43,236 INFO L225 Difference]: With dead ends: 205 [2020-10-14 18:14:43,236 INFO L226 Difference]: Without dead ends: 176 [2020-10-14 18:14:43,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=365, Invalid=2827, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 18:14:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-14 18:14:43,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-14 18:14:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-14 18:14:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2020-10-14 18:14:43,304 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 80 [2020-10-14 18:14:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:43,305 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2020-10-14 18:14:43,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:14:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2020-10-14 18:14:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 18:14:43,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:43,308 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:14:43,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:14:43,309 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:43,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1767249402, now seen corresponding path program 8 times [2020-10-14 18:14:43,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:43,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995704483] [2020-10-14 18:14:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:43,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:44,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:46,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:48,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:48,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 18:14:48,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:14:48,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:14:48,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:48,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:14:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 18:14:48,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0