/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 SingleStatement --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=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:38:08,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:38:08,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:38:08,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:38:08,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:38:08,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:38:08,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:38:08,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:38:08,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:38:08,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:38:08,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:38:08,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:38:08,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:38:08,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:38:08,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:38:08,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:38:08,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:38:08,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:38:08,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:38:08,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:38:08,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:38:08,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:38:08,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:38:08,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:38:08,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:38:08,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:38:08,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:38:08,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:38:08,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:38:08,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:38:08,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:38:08,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:38:08,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:38:08,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:38:08,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:38:08,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:38:08,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:38:08,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:38:08,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:38:08,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:38:08,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:38:08,176 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 [2020-09-25 04:38:08,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:38:08,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:38:08,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:38:08,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:38:08,205 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:38:08,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:38:08,205 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:38:08,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:38:08,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:38:08,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:38:08,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:38:08,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:38:08,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:38:08,207 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:38:08,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:38:08,207 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:38:08,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:38:08,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:38:08,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:38:08,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:38:08,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:38:08,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:38:08,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:38:08,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:38:08,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:38:08,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:38:08,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:38:08,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:38:08,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:38:08,210 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 -> SingleStatement 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=0.2;log-additional-information=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=0.2;log-additional-information=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=0.2;log-additional-information=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=0.2;log-additional-information=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=0.2;log-additional-information=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=0.2;log-additional-information=true; [2020-09-25 04:38:08,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:38:08,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:38:08,698 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:38:08,701 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:38:08,702 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:38:08,703 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 04:38:08,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1146cccba/93dd52f7f2c744418ad16cc248bf4967/FLAGd902cbc64 [2020-09-25 04:38:09,443 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:38:09,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 04:38:09,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1146cccba/93dd52f7f2c744418ad16cc248bf4967/FLAGd902cbc64 [2020-09-25 04:38:09,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1146cccba/93dd52f7f2c744418ad16cc248bf4967 [2020-09-25 04:38:09,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:38:09,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:38:09,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:38:09,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:38:09,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:38:09,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:38:09" (1/1) ... [2020-09-25 04:38:09,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a35e781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:09, skipping insertion in model container [2020-09-25 04:38:09,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:38:09" (1/1) ... [2020-09-25 04:38:09,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:38:09,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:38:10,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:38:10,446 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:38:10,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:38:10,975 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:38:10,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10 WrapperNode [2020-09-25 04:38:10,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:38:10,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:38:10,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:38:10,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:38:10,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10" (1/1) ... [2020-09-25 04:38:10,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10" (1/1) ... [2020-09-25 04:38:11,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10" (1/1) ... [2020-09-25 04:38:11,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10" (1/1) ... [2020-09-25 04:38:11,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10" (1/1) ... [2020-09-25 04:38:11,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10" (1/1) ... [2020-09-25 04:38:11,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10" (1/1) ... [2020-09-25 04:38:11,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:38:11,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:38:11,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:38:11,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:38:11,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10" (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 [2020-09-25 04:38:11,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:38:11,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:38:11,217 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 04:38:11,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:38:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:38:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 04:38:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 04:38:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 04:38:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 04:38:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 04:38:11,219 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 04:38:11,219 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 04:38:11,219 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 04:38:11,219 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 04:38:11,220 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 04:38:11,220 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 04:38:11,220 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 04:38:11,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:38:11,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:38:11,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:38:12,904 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:38:12,905 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 04:38:12,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:38:12 BoogieIcfgContainer [2020-09-25 04:38:12,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:38:12,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:38:12,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:38:12,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:38:12,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:38:09" (1/3) ... [2020-09-25 04:38:12,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edc200d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:38:12, skipping insertion in model container [2020-09-25 04:38:12,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:38:10" (2/3) ... [2020-09-25 04:38:12,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edc200d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:38:12, skipping insertion in model container [2020-09-25 04:38:12,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:38:12" (3/3) ... [2020-09-25 04:38:12,937 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 04:38:12,952 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:38:12,970 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:38:12,993 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:38:13,034 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:38:13,034 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:38:13,034 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:38:13,034 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:38:13,034 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:38:13,035 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:38:13,035 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:38:13,035 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:38:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states. [2020-09-25 04:38:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 04:38:13,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:38:13,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:38:13,122 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:38:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:38:13,133 INFO L82 PathProgramCache]: Analyzing trace with hash 752602954, now seen corresponding path program 1 times [2020-09-25 04:38:13,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:38:13,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279670337] [2020-09-25 04:38:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:38:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:38:14,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:14,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:14,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:15,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:15,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:15,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:16,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:18,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:38:18,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 04:38:18,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 04:38:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-09-25 04:38:18,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:38:18,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:38:18,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:38:18,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-09-25 04:38:18,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-25 04:38:18,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 04:38:19,591 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 04:38:19,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:38:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:38:19,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:19,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:38:19,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 04:38:19,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:38:19,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 04:38:19,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:38:19,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:38:19,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:38:19,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:38:19,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:38:19,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:38:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:38:20,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279670337] [2020-09-25 04:38:20,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:38:20,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:38:20,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830381923] [2020-09-25 04:38:20,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:38:20,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:38:20,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:38:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:38:20,044 INFO L87 Difference]: Start difference. First operand 912 states. Second operand 4 states. [2020-09-25 04:38:24,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:38:24,006 INFO L93 Difference]: Finished difference Result 1664 states and 2163 transitions. [2020-09-25 04:38:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 04:38:24,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 04:38:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:38:24,046 INFO L225 Difference]: With dead ends: 1664 [2020-09-25 04:38:24,047 INFO L226 Difference]: Without dead ends: 1251 [2020-09-25 04:38:24,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:38:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-09-25 04:38:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1244. [2020-09-25 04:38:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2020-09-25 04:38:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1517 transitions. [2020-09-25 04:38:24,184 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1517 transitions. Word has length 460 [2020-09-25 04:38:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:38:24,186 INFO L479 AbstractCegarLoop]: Abstraction has 1244 states and 1517 transitions. [2020-09-25 04:38:24,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:38:24,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1517 transitions. [2020-09-25 04:38:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 04:38:24,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:38:24,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:38:24,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:38:24,202 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:38:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:38:24,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1495383786, now seen corresponding path program 1 times [2020-09-25 04:38:24,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:38:24,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21964405] [2020-09-25 04:38:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:38:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:38:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:24,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:24,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:25,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:25,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:25,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:25,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:29,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:38:29,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 04:38:29,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 04:38:29,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-09-25 04:38:29,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:38:29,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:38:29,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:38:29,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-09-25 04:38:29,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-09-25 04:38:29,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:38:29,795 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 04:38:29,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:38:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:38:29,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:29,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:38:29,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 04:38:29,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:38:29,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-25 04:38:29,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:38:29,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:38:29,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:38:29,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:38:29,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:38:29,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:38:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:38:30,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21964405] [2020-09-25 04:38:30,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:38:30,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:38:30,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255458531] [2020-09-25 04:38:30,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:38:30,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:38:30,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:38:30,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:38:30,186 INFO L87 Difference]: Start difference. First operand 1244 states and 1517 transitions. Second operand 4 states. [2020-09-25 04:38:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:38:33,387 INFO L93 Difference]: Finished difference Result 2510 states and 3146 transitions. [2020-09-25 04:38:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 04:38:33,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 04:38:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:38:33,401 INFO L225 Difference]: With dead ends: 2510 [2020-09-25 04:38:33,401 INFO L226 Difference]: Without dead ends: 2066 [2020-09-25 04:38:33,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:38:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2020-09-25 04:38:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2054. [2020-09-25 04:38:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2054 states. [2020-09-25 04:38:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2545 transitions. [2020-09-25 04:38:33,476 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2545 transitions. Word has length 460 [2020-09-25 04:38:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:38:33,477 INFO L479 AbstractCegarLoop]: Abstraction has 2054 states and 2545 transitions. [2020-09-25 04:38:33,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:38:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2545 transitions. [2020-09-25 04:38:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 04:38:33,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:38:33,484 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:38:33,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:38:33,484 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:38:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:38:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash -863833942, now seen corresponding path program 1 times [2020-09-25 04:38:33,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:38:33,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868174182] [2020-09-25 04:38:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:38:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:38:33,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:33,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:34,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:34,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:34,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:35,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:38,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:38:38,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 04:38:38,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 04:38:38,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 04:38:38,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:38:38,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:38:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:38:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 04:38:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-25 04:38:38,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:38:38,979 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 04:38:38,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:38:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:38:38,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:39,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:38:39,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 04:38:39,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:38:39,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 04:38:39,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:38:39,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:38:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:38:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:38:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:38:39,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:38:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:38:39,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868174182] [2020-09-25 04:38:39,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:38:39,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:38:39,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887790845] [2020-09-25 04:38:39,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:38:39,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:38:39,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:38:39,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:38:39,427 INFO L87 Difference]: Start difference. First operand 2054 states and 2545 transitions. Second operand 4 states. [2020-09-25 04:38:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:38:42,084 INFO L93 Difference]: Finished difference Result 4382 states and 5559 transitions. [2020-09-25 04:38:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 04:38:42,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 04:38:42,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:38:42,111 INFO L225 Difference]: With dead ends: 4382 [2020-09-25 04:38:42,111 INFO L226 Difference]: Without dead ends: 3596 [2020-09-25 04:38:42,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:38:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2020-09-25 04:38:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3574. [2020-09-25 04:38:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3574 states. [2020-09-25 04:38:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 4481 transitions. [2020-09-25 04:38:42,271 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 4481 transitions. Word has length 460 [2020-09-25 04:38:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:38:42,273 INFO L479 AbstractCegarLoop]: Abstraction has 3574 states and 4481 transitions. [2020-09-25 04:38:42,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:38:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 4481 transitions. [2020-09-25 04:38:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 04:38:42,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:38:42,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:38:42,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:38:42,292 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:38:42,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:38:42,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1795052938, now seen corresponding path program 1 times [2020-09-25 04:38:42,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:38:42,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622404288] [2020-09-25 04:38:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:38:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:38:42,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:42,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:43,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:43,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:43,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:43,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:43,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:45,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:46,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:47,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:38:47,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 04:38:47,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 04:38:47,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 04:38:47,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:38:47,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:38:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 04:38:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-25 04:38:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-25 04:38:47,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:38:47,988 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 04:38:47,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:38:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:38:48,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:48,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:38:48,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 04:38:48,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:38:48,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 04:38:48,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:38:48,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:38:48,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:38:48,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:38:48,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:38:48,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:38:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:38:48,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622404288] [2020-09-25 04:38:48,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:38:48,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:38:48,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70347296] [2020-09-25 04:38:48,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:38:48,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:38:48,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:38:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:38:48,268 INFO L87 Difference]: Start difference. First operand 3574 states and 4481 transitions. Second operand 5 states. [2020-09-25 04:38:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:38:53,522 INFO L93 Difference]: Finished difference Result 10121 states and 12748 transitions. [2020-09-25 04:38:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 04:38:53,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 460 [2020-09-25 04:38:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:38:53,555 INFO L225 Difference]: With dead ends: 10121 [2020-09-25 04:38:53,556 INFO L226 Difference]: Without dead ends: 6748 [2020-09-25 04:38:53,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:38:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2020-09-25 04:38:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6746. [2020-09-25 04:38:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6746 states. [2020-09-25 04:38:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6746 states to 6746 states and 8441 transitions. [2020-09-25 04:38:53,832 INFO L78 Accepts]: Start accepts. Automaton has 6746 states and 8441 transitions. Word has length 460 [2020-09-25 04:38:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:38:53,833 INFO L479 AbstractCegarLoop]: Abstraction has 6746 states and 8441 transitions. [2020-09-25 04:38:53,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:38:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 6746 states and 8441 transitions. [2020-09-25 04:38:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-09-25 04:38:53,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:38:53,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:38:53,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:38:53,853 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:38:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:38:53,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1978917356, now seen corresponding path program 1 times [2020-09-25 04:38:53,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:38:53,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297840616] [2020-09-25 04:38:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:38:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:38:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:54,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:54,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:54,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:38:54,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking...