/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:55:19,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:55:19,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:55:19,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:55:19,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:55:19,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:55:19,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:55:19,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:55:19,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:55:19,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:55:19,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:55:19,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:55:19,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:55:19,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:55:19,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:55:19,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:55:19,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:55:19,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:55:19,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:55:19,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:55:19,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:55:19,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:55:19,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:55:19,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:55:19,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:55:19,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:55:19,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:55:19,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:55:19,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:55:19,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:55:19,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:55:19,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:55:19,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:55:19,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:55:19,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:55:19,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:55:19,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:55:19,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:55:19,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:55:19,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:55:19,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:55:19,168 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 08:55:19,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:55:19,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:55:19,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:55:19,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:55:19,208 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:55:19,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:55:19,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:55:19,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:55:19,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:55:19,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:55:19,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:55:19,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:55:19,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:55:19,211 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:55:19,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:55:19,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:55:19,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:55:19,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:55:19,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:55:19,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:55:19,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:55:19,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:55:19,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:55:19,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:55:19,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:55:19,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:55:19,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:55:19,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:55:19,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:55:19,214 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:55:19,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:55:19,515 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:55:19,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:55:19,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:55:19,520 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:55:19,521 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:55:19,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be58741c2/9a65e16a97824170943703397d2bd4b8/FLAGc2f80200f [2020-10-14 08:55:20,066 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:55:20,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:55:20,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be58741c2/9a65e16a97824170943703397d2bd4b8/FLAGc2f80200f [2020-10-14 08:55:20,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be58741c2/9a65e16a97824170943703397d2bd4b8 [2020-10-14 08:55:20,433 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:55:20,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:55:20,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:55:20,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:55:20,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:55:20,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:55:20" (1/1) ... [2020-10-14 08:55:20,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4122bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:20, skipping insertion in model container [2020-10-14 08:55:20,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:55:20" (1/1) ... [2020-10-14 08:55:20,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:55:20,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:55:20,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:55:20,800 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:55:20,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:55:21,019 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:55:21,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21 WrapperNode [2020-10-14 08:55:21,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:55:21,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:55:21,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:55:21,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:55:21,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21" (1/1) ... [2020-10-14 08:55:21,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21" (1/1) ... [2020-10-14 08:55:21,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21" (1/1) ... [2020-10-14 08:55:21,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21" (1/1) ... [2020-10-14 08:55:21,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21" (1/1) ... [2020-10-14 08:55:21,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21" (1/1) ... [2020-10-14 08:55:21,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21" (1/1) ... [2020-10-14 08:55:21,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:55:21,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:55:21,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:55:21,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:55:21,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21" (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 08:55:21,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:55:21,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:55:21,153 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:55:21,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:55:21,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:55:21,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:55:21,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:55:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:55:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:55:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:55:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:55:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:55:21,154 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:55:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:55:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:55:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:55:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:55:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 08:55:21,155 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-14 08:55:21,156 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:55:21,156 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:55:21,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:55:21,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:55:21,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:55:21,843 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:55:21,844 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:55:21,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:55:21 BoogieIcfgContainer [2020-10-14 08:55:21,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:55:21,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:55:21,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:55:21,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:55:21,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:55:20" (1/3) ... [2020-10-14 08:55:21,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607d70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:55:21, skipping insertion in model container [2020-10-14 08:55:21,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:55:21" (2/3) ... [2020-10-14 08:55:21,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607d70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:55:21, skipping insertion in model container [2020-10-14 08:55:21,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:55:21" (3/3) ... [2020-10-14 08:55:21,867 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:55:21,880 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:55:21,894 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:55:21,911 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:55:21,943 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:55:21,943 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:55:21,943 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:55:21,943 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:55:21,944 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:55:21,944 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:55:21,944 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:55:21,944 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:55:21,966 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-10-14 08:55:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 08:55:21,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:55:21,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:55:21,979 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:55:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:55:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2061210715, now seen corresponding path program 1 times [2020-10-14 08:55:21,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:55:21,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797234927] [2020-10-14 08:55:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:55:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:22,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:22,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:22,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:22,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:23,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:25,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:25,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:27,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:27,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 08:55:27,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:55:27,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 08:55:27,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:27,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:55:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 08:55:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:55:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 08:55:27,696 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:55:27,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:55:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:27,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:27,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:27,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:55:27,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:27,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:55:27,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:27,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:27,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:55:27,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:55:27,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:55:27,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:55:27,745 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 08:55:27,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797234927] [2020-10-14 08:55:27,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:55:27,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:55:27,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512873746] [2020-10-14 08:55:27,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:55:27,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:55:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:55:27,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:55:27,772 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 4 states. [2020-10-14 08:55:28,017 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:55:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:55:28,750 INFO L93 Difference]: Finished difference Result 267 states and 429 transitions. [2020-10-14 08:55:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:55:28,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 08:55:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:55:28,768 INFO L225 Difference]: With dead ends: 267 [2020-10-14 08:55:28,768 INFO L226 Difference]: Without dead ends: 183 [2020-10-14 08:55:28,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:55:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-14 08:55:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-14 08:55:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 08:55:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 260 transitions. [2020-10-14 08:55:28,837 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 260 transitions. Word has length 77 [2020-10-14 08:55:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:55:28,838 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 260 transitions. [2020-10-14 08:55:28,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:55:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 260 transitions. [2020-10-14 08:55:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 08:55:28,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:55:28,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:55:28,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:55:28,843 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:55:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:55:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1851960976, now seen corresponding path program 1 times [2020-10-14 08:55:28,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:55:28,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933014638] [2020-10-14 08:55:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:55:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:28,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:28,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:29,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:29,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:29,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:30,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:32,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:32,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:33,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:33,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 08:55:33,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:55:33,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 08:55:33,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:33,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:33,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:55:33,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:55:33,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:55:33,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 08:55:34,246 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:55:34,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:55:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:34,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:34,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:34,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:55:34,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:34,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 08:55:34,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:34,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:55:34,326 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 08:55:34,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933014638] [2020-10-14 08:55:34,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:55:34,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:55:34,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479098391] [2020-10-14 08:55:34,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:55:34,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:55:34,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:55:34,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:55:34,335 INFO L87 Difference]: Start difference. First operand 181 states and 260 transitions. Second operand 4 states. [2020-10-14 08:55:34,551 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:55:35,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:55:35,181 INFO L93 Difference]: Finished difference Result 433 states and 660 transitions. [2020-10-14 08:55:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:55:35,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-14 08:55:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:55:35,187 INFO L225 Difference]: With dead ends: 433 [2020-10-14 08:55:35,188 INFO L226 Difference]: Without dead ends: 299 [2020-10-14 08:55:35,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:55:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-14 08:55:35,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2020-10-14 08:55:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-14 08:55:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 444 transitions. [2020-10-14 08:55:35,247 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 444 transitions. Word has length 78 [2020-10-14 08:55:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:55:35,247 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 444 transitions. [2020-10-14 08:55:35,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:55:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 444 transitions. [2020-10-14 08:55:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 08:55:35,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:55:35,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:55:35,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:55:35,251 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:55:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:55:35,251 INFO L82 PathProgramCache]: Analyzing trace with hash 978529655, now seen corresponding path program 1 times [2020-10-14 08:55:35,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:55:35,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042890266] [2020-10-14 08:55:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:55:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:35,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:35,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:35,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:35,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:37,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:37,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:40,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:40,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 08:55:40,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:55:40,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 08:55:40,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:40,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:55:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 08:55:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 08:55:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:55:40,484 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:55:40,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:55:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:40,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:40,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:40,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:55:40,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:40,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:55:40,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:40,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:40,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:55:40,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:55:40,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:55:40,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:55:40,523 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 08:55:40,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042890266] [2020-10-14 08:55:40,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:55:40,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:55:40,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283992107] [2020-10-14 08:55:40,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:55:40,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:55:40,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:55:40,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:55:40,527 INFO L87 Difference]: Start difference. First operand 297 states and 444 transitions. Second operand 4 states. [2020-10-14 08:55:40,762 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:55:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:55:41,286 INFO L93 Difference]: Finished difference Result 765 states and 1186 transitions. [2020-10-14 08:55:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:55:41,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-14 08:55:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:55:41,290 INFO L225 Difference]: With dead ends: 765 [2020-10-14 08:55:41,290 INFO L226 Difference]: Without dead ends: 515 [2020-10-14 08:55:41,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:55:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-14 08:55:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 513. [2020-10-14 08:55:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-14 08:55:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 784 transitions. [2020-10-14 08:55:41,329 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 784 transitions. Word has length 79 [2020-10-14 08:55:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:55:41,330 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 784 transitions. [2020-10-14 08:55:41,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:55:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 784 transitions. [2020-10-14 08:55:41,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 08:55:41,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:55:41,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:55:41,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:55:41,332 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:55:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:55:41,333 INFO L82 PathProgramCache]: Analyzing trace with hash -226197500, now seen corresponding path program 1 times [2020-10-14 08:55:41,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:55:41,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551705911] [2020-10-14 08:55:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:55:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:41,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:41,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:41,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:41,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:43,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:43,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:43,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:43,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:46,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:46,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 08:55:46,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:55:46,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 08:55:46,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:46,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:46,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:55:46,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:55:46,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:55:46,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:55:46,548 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:55:46,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:55:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:46,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:46,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:55:46,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:46,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:55:46,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:46,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:55:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:55:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:55:46,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:55:46,584 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 08:55:46,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551705911] [2020-10-14 08:55:46,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:55:46,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:55:46,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483969135] [2020-10-14 08:55:46,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:55:46,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:55:46,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:55:46,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:55:46,587 INFO L87 Difference]: Start difference. First operand 513 states and 784 transitions. Second operand 4 states. [2020-10-14 08:55:46,765 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:55:47,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:55:47,336 INFO L93 Difference]: Finished difference Result 1381 states and 2154 transitions. [2020-10-14 08:55:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:55:47,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 08:55:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:55:47,346 INFO L225 Difference]: With dead ends: 1381 [2020-10-14 08:55:47,346 INFO L226 Difference]: Without dead ends: 915 [2020-10-14 08:55:47,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:55:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2020-10-14 08:55:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 913. [2020-10-14 08:55:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2020-10-14 08:55:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1408 transitions. [2020-10-14 08:55:47,403 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1408 transitions. Word has length 80 [2020-10-14 08:55:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:55:47,404 INFO L479 AbstractCegarLoop]: Abstraction has 913 states and 1408 transitions. [2020-10-14 08:55:47,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:55:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1408 transitions. [2020-10-14 08:55:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 08:55:47,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:55:47,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:55:47,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:55:47,414 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:55:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:55:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1634167413, now seen corresponding path program 1 times [2020-10-14 08:55:47,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:55:47,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042334256] [2020-10-14 08:55:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:55:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:47,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:47,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:47,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:47,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:48,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:48,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:48,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:52,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:52,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 08:55:52,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:55:52,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 08:55:52,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:52,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:55:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:55:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:55:52,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:55:52,682 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:55:52,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:55:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:52,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:52,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:52,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:55:52,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:52,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:55:52,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:52,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:55:52,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:55:52,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:55:52,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:55:52,729 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 08:55:52,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042334256] [2020-10-14 08:55:52,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:55:52,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:55:52,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676928962] [2020-10-14 08:55:52,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:55:52,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:55:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:55:52,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:55:52,737 INFO L87 Difference]: Start difference. First operand 913 states and 1408 transitions. Second operand 4 states. [2020-10-14 08:55:52,958 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:55:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:55:53,598 INFO L93 Difference]: Finished difference Result 2517 states and 3922 transitions. [2020-10-14 08:55:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:55:53,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 08:55:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:55:53,609 INFO L225 Difference]: With dead ends: 2517 [2020-10-14 08:55:53,609 INFO L226 Difference]: Without dead ends: 1651 [2020-10-14 08:55:53,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:55:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2020-10-14 08:55:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1649. [2020-10-14 08:55:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-10-14 08:55:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2544 transitions. [2020-10-14 08:55:53,696 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2544 transitions. Word has length 81 [2020-10-14 08:55:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:55:53,697 INFO L479 AbstractCegarLoop]: Abstraction has 1649 states and 2544 transitions. [2020-10-14 08:55:53,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:55:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2544 transitions. [2020-10-14 08:55:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:55:53,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:55:53,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:55:53,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:55:53,699 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:55:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:55:53,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1156599862, now seen corresponding path program 1 times [2020-10-14 08:55:53,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:55:53,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202977822] [2020-10-14 08:55:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:55:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:53,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:53,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:53,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:53,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:54,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:54,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:56,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:56,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:58,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:58,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:58,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:55:58,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:55:58,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:55:58,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:58,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:58,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:55:58,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:55:58,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 08:55:58,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:55:59,044 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:55:59,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:55:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:59,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:59,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:59,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:55:59,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:59,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-14 08:55:59,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:59,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:59,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:55:59,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:55:59,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:55:59,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:55:59,155 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 08:55:59,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202977822] [2020-10-14 08:55:59,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:55:59,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:55:59,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206071065] [2020-10-14 08:55:59,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:55:59,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:55:59,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:55:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:55:59,161 INFO L87 Difference]: Start difference. First operand 1649 states and 2544 transitions. Second operand 6 states. [2020-10-14 08:55:59,429 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:56:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:00,154 INFO L93 Difference]: Finished difference Result 4837 states and 7506 transitions. [2020-10-14 08:56:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:56:00,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:56:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:00,177 INFO L225 Difference]: With dead ends: 4837 [2020-10-14 08:56:00,177 INFO L226 Difference]: Without dead ends: 3235 [2020-10-14 08:56:00,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:56:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2020-10-14 08:56:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3233. [2020-10-14 08:56:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2020-10-14 08:56:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4992 transitions. [2020-10-14 08:56:00,389 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4992 transitions. Word has length 82 [2020-10-14 08:56:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:00,390 INFO L479 AbstractCegarLoop]: Abstraction has 3233 states and 4992 transitions. [2020-10-14 08:56:00,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:56:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4992 transitions. [2020-10-14 08:56:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:56:00,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:00,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:56:00,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:56:00,391 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash 117268143, now seen corresponding path program 1 times [2020-10-14 08:56:00,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:00,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097274855] [2020-10-14 08:56:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:00,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:00,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:00,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:00,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:00,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:00,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:02,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:05,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:05,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:56:05,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:56:05,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:56:05,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:05,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:05,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:56:05,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:56:05,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 08:56:05,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:05,636 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:56:05,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:05,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:05,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:05,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:05,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:05,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 08:56:05,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:05,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:05,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:56:05,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:05,693 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 08:56:05,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097274855] [2020-10-14 08:56:05,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:05,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:56:05,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252546158] [2020-10-14 08:56:05,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:56:05,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:05,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:56:05,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:56:05,695 INFO L87 Difference]: Start difference. First operand 3233 states and 4992 transitions. Second operand 6 states. [2020-10-14 08:56:05,878 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:56:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:06,592 INFO L93 Difference]: Finished difference Result 9573 states and 14818 transitions. [2020-10-14 08:56:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:56:06,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:56:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:06,623 INFO L225 Difference]: With dead ends: 9573 [2020-10-14 08:56:06,623 INFO L226 Difference]: Without dead ends: 6387 [2020-10-14 08:56:06,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:56:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2020-10-14 08:56:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 6385. [2020-10-14 08:56:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6385 states. [2020-10-14 08:56:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6385 states to 6385 states and 9840 transitions. [2020-10-14 08:56:06,992 INFO L78 Accepts]: Start accepts. Automaton has 6385 states and 9840 transitions. Word has length 82 [2020-10-14 08:56:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:06,993 INFO L479 AbstractCegarLoop]: Abstraction has 6385 states and 9840 transitions. [2020-10-14 08:56:06,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:56:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6385 states and 9840 transitions. [2020-10-14 08:56:06,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:56:06,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:06,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:56:06,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:56:06,994 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1329761452, now seen corresponding path program 1 times [2020-10-14 08:56:06,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:06,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393638242] [2020-10-14 08:56:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:07,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:07,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:07,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:09,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:09,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:56:09,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:56:09,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2057 [2020-10-14 08:56:09,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:09,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:56:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:56:09,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 08:56:09,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:09,265 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:56:09,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:09,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:09,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:09,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:09,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:09,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:56:09,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:09,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:09,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:09,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:56:09,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:09,314 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 08:56:09,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393638242] [2020-10-14 08:56:09,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:09,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:56:09,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499584874] [2020-10-14 08:56:09,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:56:09,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:56:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:56:09,317 INFO L87 Difference]: Start difference. First operand 6385 states and 9840 transitions. Second operand 6 states. [2020-10-14 08:56:09,501 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:56:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:10,467 INFO L93 Difference]: Finished difference Result 18997 states and 29298 transitions. [2020-10-14 08:56:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:56:10,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:56:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:10,532 INFO L225 Difference]: With dead ends: 18997 [2020-10-14 08:56:10,532 INFO L226 Difference]: Without dead ends: 12659 [2020-10-14 08:56:10,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:56:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12659 states. [2020-10-14 08:56:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12659 to 12657. [2020-10-14 08:56:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12657 states. [2020-10-14 08:56:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12657 states to 12657 states and 19440 transitions. [2020-10-14 08:56:11,373 INFO L78 Accepts]: Start accepts. Automaton has 12657 states and 19440 transitions. Word has length 82 [2020-10-14 08:56:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:11,373 INFO L479 AbstractCegarLoop]: Abstraction has 12657 states and 19440 transitions. [2020-10-14 08:56:11,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:56:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 12657 states and 19440 transitions. [2020-10-14 08:56:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:56:11,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:11,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:56:11,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:56:11,375 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2376263, now seen corresponding path program 1 times [2020-10-14 08:56:11,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:11,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303696693] [2020-10-14 08:56:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:11,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:11,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:11,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:11,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:56:11,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:56:11,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-14 08:56:11,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:11,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:11,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:56:11,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:56:11,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 08:56:11,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:12,095 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:56:12,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:12,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:12,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:12,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:12,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:12,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:56:12,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:12,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:56:12,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:12,138 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 08:56:12,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303696693] [2020-10-14 08:56:12,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:12,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:56:12,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315298576] [2020-10-14 08:56:12,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:56:12,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:56:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:56:12,140 INFO L87 Difference]: Start difference. First operand 12657 states and 19440 transitions. Second operand 6 states. [2020-10-14 08:56:12,343 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:56:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:13,188 INFO L93 Difference]: Finished difference Result 25267 states and 38833 transitions. [2020-10-14 08:56:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:56:13,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:56:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:13,222 INFO L225 Difference]: With dead ends: 25267 [2020-10-14 08:56:13,222 INFO L226 Difference]: Without dead ends: 12657 [2020-10-14 08:56:13,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:56:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12657 states. [2020-10-14 08:56:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12657 to 12657. [2020-10-14 08:56:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12657 states. [2020-10-14 08:56:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12657 states to 12657 states and 19184 transitions. [2020-10-14 08:56:13,972 INFO L78 Accepts]: Start accepts. Automaton has 12657 states and 19184 transitions. Word has length 82 [2020-10-14 08:56:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:13,973 INFO L479 AbstractCegarLoop]: Abstraction has 12657 states and 19184 transitions. [2020-10-14 08:56:13,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:56:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 12657 states and 19184 transitions. [2020-10-14 08:56:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:56:13,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:13,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:56:13,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:56:13,974 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:13,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1718954612, now seen corresponding path program 1 times [2020-10-14 08:56:13,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:13,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134624418] [2020-10-14 08:56:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:14,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:14,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:14,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:56:14,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-14 08:56:14,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:14,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 08:56:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:56:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:56:14,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:14,536 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:56:14,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:14,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:14,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:14,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:56:14,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:14,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:14,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:14,573 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 08:56:14,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134624418] [2020-10-14 08:56:14,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:14,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 08:56:14,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159700346] [2020-10-14 08:56:14,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 08:56:14,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 08:56:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:56:14,577 INFO L87 Difference]: Start difference. First operand 12657 states and 19184 transitions. Second operand 9 states. [2020-10-14 08:56:14,796 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-14 08:56:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:21,714 INFO L93 Difference]: Finished difference Result 163977 states and 248828 transitions. [2020-10-14 08:56:21,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 08:56:21,714 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-14 08:56:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:22,121 INFO L225 Difference]: With dead ends: 163977 [2020-10-14 08:56:22,121 INFO L226 Difference]: Without dead ends: 151367 [2020-10-14 08:56:22,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-14 08:56:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151367 states. [2020-10-14 08:56:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151367 to 25265. [2020-10-14 08:56:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25265 states. [2020-10-14 08:56:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25265 states to 25265 states and 37808 transitions. [2020-10-14 08:56:24,910 INFO L78 Accepts]: Start accepts. Automaton has 25265 states and 37808 transitions. Word has length 82 [2020-10-14 08:56:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:24,910 INFO L479 AbstractCegarLoop]: Abstraction has 25265 states and 37808 transitions. [2020-10-14 08:56:24,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 08:56:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 25265 states and 37808 transitions. [2020-10-14 08:56:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:56:24,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:24,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:56:24,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:56:24,912 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:24,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1774799598, now seen corresponding path program 1 times [2020-10-14 08:56:24,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:24,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436568200] [2020-10-14 08:56:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:24,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:25,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:25,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:56:25,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:25,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-14 08:56:25,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:25,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 08:56:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:56:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 08:56:25,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:25,435 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:56:25,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:25,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:25,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:25,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:25,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:25,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:56:25,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:25,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:25,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:25,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:25,477 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 08:56:25,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436568200] [2020-10-14 08:56:25,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:25,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 08:56:25,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011313605] [2020-10-14 08:56:25,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 08:56:25,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:25,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 08:56:25,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:56:25,480 INFO L87 Difference]: Start difference. First operand 25265 states and 37808 transitions. Second operand 9 states. [2020-10-14 08:56:25,750 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:56:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:37,055 INFO L93 Difference]: Finished difference Result 176585 states and 264380 transitions. [2020-10-14 08:56:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 08:56:37,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-14 08:56:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:37,367 INFO L225 Difference]: With dead ends: 176585 [2020-10-14 08:56:37,367 INFO L226 Difference]: Without dead ends: 151367 [2020-10-14 08:56:37,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-14 08:56:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151367 states. [2020-10-14 08:56:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151367 to 25265. [2020-10-14 08:56:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25265 states. [2020-10-14 08:56:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25265 states to 25265 states and 37552 transitions. [2020-10-14 08:56:40,499 INFO L78 Accepts]: Start accepts. Automaton has 25265 states and 37552 transitions. Word has length 84 [2020-10-14 08:56:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:40,500 INFO L479 AbstractCegarLoop]: Abstraction has 25265 states and 37552 transitions. [2020-10-14 08:56:40,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 08:56:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25265 states and 37552 transitions. [2020-10-14 08:56:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:56:40,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:40,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:56:40,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:56:40,501 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:40,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1754750255, now seen corresponding path program 1 times [2020-10-14 08:56:40,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:40,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400630573] [2020-10-14 08:56:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:40,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:40,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:40,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:40,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:40,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:56:40,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 08:56:40,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-14 08:56:40,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:40,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:56:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 08:56:40,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:41,506 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:56:41,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:41,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:41,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:41,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:41,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:41,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:56:41,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:41,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:41,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:41,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:41,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:41,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:41,534 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 08:56:41,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400630573] [2020-10-14 08:56:41,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:41,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:56:41,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353037103] [2020-10-14 08:56:41,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:56:41,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:56:41,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:56:41,537 INFO L87 Difference]: Start difference. First operand 25265 states and 37552 transitions. Second operand 4 states. [2020-10-14 08:56:41,715 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:56:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:45,827 INFO L93 Difference]: Finished difference Result 72885 states and 107698 transitions. [2020-10-14 08:56:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:56:45,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-14 08:56:45,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:45,897 INFO L225 Difference]: With dead ends: 72885 [2020-10-14 08:56:45,897 INFO L226 Difference]: Without dead ends: 47667 [2020-10-14 08:56:45,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:56:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47667 states. [2020-10-14 08:56:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47667 to 47153. [2020-10-14 08:56:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47153 states. [2020-10-14 08:56:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47153 states to 47153 states and 68400 transitions. [2020-10-14 08:56:50,056 INFO L78 Accepts]: Start accepts. Automaton has 47153 states and 68400 transitions. Word has length 84 [2020-10-14 08:56:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:50,056 INFO L479 AbstractCegarLoop]: Abstraction has 47153 states and 68400 transitions. [2020-10-14 08:56:50,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:56:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 47153 states and 68400 transitions. [2020-10-14 08:56:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 08:56:50,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:50,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:56:50,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:56:50,058 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:50,058 INFO L82 PathProgramCache]: Analyzing trace with hash -817696616, now seen corresponding path program 1 times [2020-10-14 08:56:50,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:50,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298294270] [2020-10-14 08:56:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:50,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:50,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:50,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 08:56:50,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-14 08:56:50,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:50,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:56:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-14 08:56:50,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:56:50,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:50,383 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:56:50,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:50,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:50,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:50,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:50,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:56:50,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:50,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:50,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:50,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:50,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:50,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:50,413 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 08:56:50,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298294270] [2020-10-14 08:56:50,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:50,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:56:50,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486038064] [2020-10-14 08:56:50,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:56:50,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:56:50,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:56:50,416 INFO L87 Difference]: Start difference. First operand 47153 states and 68400 transitions. Second operand 5 states. [2020-10-14 08:56:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:58,740 INFO L93 Difference]: Finished difference Result 80032 states and 116207 transitions. [2020-10-14 08:56:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:56:58,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-14 08:56:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:58,824 INFO L225 Difference]: With dead ends: 80032 [2020-10-14 08:56:58,825 INFO L226 Difference]: Without dead ends: 80030 [2020-10-14 08:56:58,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:56:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80030 states. [2020-10-14 08:57:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80030 to 48177. [2020-10-14 08:57:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48177 states. [2020-10-14 08:57:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48177 states to 48177 states and 69168 transitions. [2020-10-14 08:57:03,427 INFO L78 Accepts]: Start accepts. Automaton has 48177 states and 69168 transitions. Word has length 85 [2020-10-14 08:57:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:57:03,428 INFO L479 AbstractCegarLoop]: Abstraction has 48177 states and 69168 transitions. [2020-10-14 08:57:03,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:57:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 48177 states and 69168 transitions. [2020-10-14 08:57:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 08:57:03,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:03,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:57:03,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:57:03,430 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash 876944192, now seen corresponding path program 1 times [2020-10-14 08:57:03,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:03,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37357905] [2020-10-14 08:57:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:03,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:03,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:03,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:04,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:04,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 08:57:04,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:57:04,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1429 [2020-10-14 08:57:04,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:04,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:57:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:57:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 08:57:04,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:05,045 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:57:05,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:05,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:05,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:05,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:05,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:05,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:57:05,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:05,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:05,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:57:05,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:05,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:57:05,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:05,069 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 08:57:05,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37357905] [2020-10-14 08:57:05,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:57:05,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:57:05,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916741961] [2020-10-14 08:57:05,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:57:05,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:05,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:57:05,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:57:05,071 INFO L87 Difference]: Start difference. First operand 48177 states and 69168 transitions. Second operand 4 states. [2020-10-14 08:57:05,248 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:57:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:57:12,773 INFO L93 Difference]: Finished difference Result 95544 states and 138550 transitions. [2020-10-14 08:57:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:57:12,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-14 08:57:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:57:12,842 INFO L225 Difference]: With dead ends: 95544 [2020-10-14 08:57:12,842 INFO L226 Difference]: Without dead ends: 69301 [2020-10-14 08:57:12,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:57:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69301 states. [2020-10-14 08:57:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69301 to 69299. [2020-10-14 08:57:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69299 states. [2020-10-14 08:57:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69299 states to 69299 states and 99506 transitions. [2020-10-14 08:57:19,543 INFO L78 Accepts]: Start accepts. Automaton has 69299 states and 99506 transitions. Word has length 85 [2020-10-14 08:57:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:57:19,543 INFO L479 AbstractCegarLoop]: Abstraction has 69299 states and 99506 transitions. [2020-10-14 08:57:19,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:57:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 69299 states and 99506 transitions. [2020-10-14 08:57:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 08:57:19,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:19,555 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:57:19,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:57:19,556 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash -220569287, now seen corresponding path program 1 times [2020-10-14 08:57:19,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:19,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583184538] [2020-10-14 08:57:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:19,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:19,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:19,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:19,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:20,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:20,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:20,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:21,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:21,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:23,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:23,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:24,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:24,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:24,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:24,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 08:57:24,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 08:57:24,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:57:24,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:24,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:24,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:57:24,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 08:57:24,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 08:57:24,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:24,761 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:57:24,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:24,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:24,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:24,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:24,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:24,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:57:24,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:24,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:24,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:57:24,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:24,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:57:24,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:57:24,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583184538] [2020-10-14 08:57:24,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:57:24,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:57:24,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281157767] [2020-10-14 08:57:24,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:57:24,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:24,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:57:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:57:24,789 INFO L87 Difference]: Start difference. First operand 69299 states and 99506 transitions. Second operand 4 states. [2020-10-14 08:57:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:57:29,749 INFO L93 Difference]: Finished difference Result 116707 states and 168425 transitions. [2020-10-14 08:57:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:57:29,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-14 08:57:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:57:29,802 INFO L225 Difference]: With dead ends: 116707 [2020-10-14 08:57:29,803 INFO L226 Difference]: Without dead ends: 47457 [2020-10-14 08:57:29,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:57:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47457 states. [2020-10-14 08:57:34,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47457 to 47455. [2020-10-14 08:57:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47455 states. [2020-10-14 08:57:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47455 states to 47455 states and 68454 transitions. [2020-10-14 08:57:34,662 INFO L78 Accepts]: Start accepts. Automaton has 47455 states and 68454 transitions. Word has length 116 [2020-10-14 08:57:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:57:34,662 INFO L479 AbstractCegarLoop]: Abstraction has 47455 states and 68454 transitions. [2020-10-14 08:57:34,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:57:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 47455 states and 68454 transitions. [2020-10-14 08:57:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 08:57:34,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:34,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:57:34,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:57:34,670 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash -583117170, now seen corresponding path program 1 times [2020-10-14 08:57:34,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:34,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446234277] [2020-10-14 08:57:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:34,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:34,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:34,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:35,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:35,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:35,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:35,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:35,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:36,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:36,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:38,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:38,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:38,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:38,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:39,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:39,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:39,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 08:57:39,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 08:57:39,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:57:39,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:39,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:57:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:57:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 08:57:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:39,879 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:57:39,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:39,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:39,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:39,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:39,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:57:39,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:39,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:57:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:57:39,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:57:39,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446234277] [2020-10-14 08:57:39,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:57:39,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:57:39,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194154042] [2020-10-14 08:57:39,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:57:39,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:57:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:57:39,914 INFO L87 Difference]: Start difference. First operand 47455 states and 68454 transitions. Second operand 6 states. [2020-10-14 08:57:40,094 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:57:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:57:49,966 INFO L93 Difference]: Finished difference Result 139109 states and 201577 transitions. [2020-10-14 08:57:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:57:49,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-14 08:57:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:57:50,071 INFO L225 Difference]: With dead ends: 139109 [2020-10-14 08:57:50,071 INFO L226 Difference]: Without dead ends: 91747 [2020-10-14 08:57:50,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:57:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91747 states. [2020-10-14 08:57:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91747 to 91743. [2020-10-14 08:57:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91743 states. [2020-10-14 08:57:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91743 states to 91743 states and 132198 transitions. [2020-10-14 08:57:59,356 INFO L78 Accepts]: Start accepts. Automaton has 91743 states and 132198 transitions. Word has length 117 [2020-10-14 08:57:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:57:59,356 INFO L479 AbstractCegarLoop]: Abstraction has 91743 states and 132198 transitions. [2020-10-14 08:57:59,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:57:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 91743 states and 132198 transitions. [2020-10-14 08:57:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 08:57:59,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:59,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:57:59,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:57:59,365 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:59,366 INFO L82 PathProgramCache]: Analyzing trace with hash 535218074, now seen corresponding path program 1 times [2020-10-14 08:57:59,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:59,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484953389] [2020-10-14 08:57:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:59,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:59,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:59,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:59,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:00,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:00,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:00,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:00,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:01,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:01,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:01,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:01,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:04,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:04,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:04,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:04,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 08:58:04,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 08:58:04,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-14 08:58:04,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:04,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:58:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 08:58:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 08:58:04,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:58:04,613 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:58:04,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:58:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:58:04,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:04,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:04,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:58:04,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:58:04,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:58:04,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:04,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:04,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:58:04,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:58:04,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:58:04,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:58:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:58:04,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484953389] [2020-10-14 08:58:04,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:58:04,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:58:04,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434556624] [2020-10-14 08:58:04,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:58:04,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:58:04,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:58:04,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:58:04,647 INFO L87 Difference]: Start difference. First operand 91743 states and 132198 transitions. Second operand 6 states. [2020-10-14 08:58:04,843 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:58:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:58:20,557 INFO L93 Difference]: Finished difference Result 244261 states and 352425 transitions. [2020-10-14 08:58:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:58:20,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-14 08:58:20,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:58:20,747 INFO L225 Difference]: With dead ends: 244261 [2020-10-14 08:58:20,747 INFO L226 Difference]: Without dead ends: 152611 [2020-10-14 08:58:20,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:58:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152611 states. [2020-10-14 08:58:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152611 to 139103. [2020-10-14 08:58:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139103 states. [2020-10-14 08:58:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139103 states to 139103 states and 201062 transitions. [2020-10-14 08:58:37,792 INFO L78 Accepts]: Start accepts. Automaton has 139103 states and 201062 transitions. Word has length 117 [2020-10-14 08:58:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:58:37,792 INFO L479 AbstractCegarLoop]: Abstraction has 139103 states and 201062 transitions. [2020-10-14 08:58:37,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:58:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 139103 states and 201062 transitions. [2020-10-14 08:58:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 08:58:37,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:58:37,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:58:37,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:58:37,801 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:58:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:58:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1474865498, now seen corresponding path program 1 times [2020-10-14 08:58:37,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:58:37,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343094694] [2020-10-14 08:58:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:58:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:58:37,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:37,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:37,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:37,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:38,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:38,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:39,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:39,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:39,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:39,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:39,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:42,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:42,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:42,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:42,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 08:58:42,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:58:42,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 08:58:42,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:42,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:42,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:58:42,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 08:58:42,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 08:58:42,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:58:43,012 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:58:43,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:58:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:58:43,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:58:43,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:58:43,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:58:43,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:58:43,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:58:43,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:58:43,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:58:43,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:58:43,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:58:43,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:58:43,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:58:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:58:43,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343094694] [2020-10-14 08:58:43,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:58:43,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:58:43,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061628380] [2020-10-14 08:58:43,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:58:43,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:58:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:58:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:58:43,043 INFO L87 Difference]: Start difference. First operand 139103 states and 201062 transitions. Second operand 6 states. [2020-10-14 08:58:43,226 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:59:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:59:02,205 INFO L93 Difference]: Finished difference Result 317541 states and 458601 transitions. [2020-10-14 08:59:02,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:59:02,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-14 08:59:02,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:59:02,432 INFO L225 Difference]: With dead ends: 317541 [2020-10-14 08:59:02,432 INFO L226 Difference]: Without dead ends: 178531 [2020-10-14 08:59:02,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:59:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178531 states.