/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=1.0 --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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:12:57,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:12:57,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:12:57,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:12:57,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:12:57,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:12:57,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:12:57,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:12:57,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:12:57,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:12:57,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:12:57,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:12:57,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:12:57,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:12:57,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:12:57,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:12:57,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:12:57,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:12:57,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:12:57,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:12:57,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:12:57,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:12:57,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:12:57,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:12:57,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:12:57,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:12:57,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:12:57,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:12:57,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:12:57,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:12:57,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:12:57,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:12:57,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:12:57,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:12:57,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:12:57,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:12:57,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:12:57,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:12:57,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:12:57,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:12:57,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:12:57,673 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 09:12:57,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:12:57,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:12:57,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:12:57,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:12:57,702 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:12:57,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:12:57,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:12:57,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:12:57,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:12:57,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:12:57,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:12:57,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:12:57,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:12:57,704 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:12:57,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:12:57,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:12:57,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:12:57,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:12:57,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:12:57,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:12:57,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:12:57,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:12:57,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:12:57,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:12:57,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:12:57,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:12:57,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:12:57,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:12:57,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:12:57,708 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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-09-25 09:12:58,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:12:58,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:12:58,202 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:12:58,205 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:12:58,207 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:12:58,209 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 09:12:58,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84627e184/533e84b41b76456f9c4d0eb999a4e5af/FLAGc98f80b53 [2020-09-25 09:12:58,985 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:12:58,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 09:12:59,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84627e184/533e84b41b76456f9c4d0eb999a4e5af/FLAGc98f80b53 [2020-09-25 09:12:59,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84627e184/533e84b41b76456f9c4d0eb999a4e5af [2020-09-25 09:12:59,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:12:59,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:12:59,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:12:59,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:12:59,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:12:59,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:12:59" (1/1) ... [2020-09-25 09:12:59,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f42e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:12:59, skipping insertion in model container [2020-09-25 09:12:59,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:12:59" (1/1) ... [2020-09-25 09:12:59,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:12:59,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:12:59,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:12:59,925 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:13:00,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:13:00,119 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:13:00,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00 WrapperNode [2020-09-25 09:13:00,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:13:00,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:13:00,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:13:00,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:13:00,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00" (1/1) ... [2020-09-25 09:13:00,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00" (1/1) ... [2020-09-25 09:13:00,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00" (1/1) ... [2020-09-25 09:13:00,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00" (1/1) ... [2020-09-25 09:13:00,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00" (1/1) ... [2020-09-25 09:13:00,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00" (1/1) ... [2020-09-25 09:13:00,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00" (1/1) ... [2020-09-25 09:13:00,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:13:00,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:13:00,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:13:00,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:13:00,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00" (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 09:13:00,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:13:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:13:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:13:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:13:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:13:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 09:13:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 09:13:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 09:13:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:13:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:13:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 09:13:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 09:13:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 09:13:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 09:13:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 09:13:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 09:13:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 09:13:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:13:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:13:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:13:02,007 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:13:02,007 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 09:13:02,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:02 BoogieIcfgContainer [2020-09-25 09:13:02,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:13:02,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:13:02,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:13:02,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:13:02,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:12:59" (1/3) ... [2020-09-25 09:13:02,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48fbb267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:02, skipping insertion in model container [2020-09-25 09:13:02,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:00" (2/3) ... [2020-09-25 09:13:02,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48fbb267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:02, skipping insertion in model container [2020-09-25 09:13:02,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:02" (3/3) ... [2020-09-25 09:13:02,029 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 09:13:02,040 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:13:02,052 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:13:02,075 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:13:02,111 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:13:02,111 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:13:02,112 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:13:02,112 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:13:02,112 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:13:02,112 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:13:02,112 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:13:02,112 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:13:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-25 09:13:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 09:13:02,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:02,189 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] [2020-09-25 09:13:02,189 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-25 09:13:02,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:02,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535520580] [2020-09-25 09:13:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:03,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:03,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:03,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:03,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:04,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:04,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:04,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:04,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:07,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:07,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 09:13:07,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:13:07,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-09-25 09:13:07,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:07,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:13:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-09-25 09:13:07,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 09:13:07,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 09:13:08,803 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 09:13:08,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:08,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:08,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:08,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 09:13:08,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:08,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 09:13:08,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:08,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:08,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:08,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:08,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:08,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:13:09,368 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 09:13:09,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535520580] [2020-09-25 09:13:09,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:13:09,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:13:09,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146569267] [2020-09-25 09:13:09,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:13:09,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:13:09,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:13:09,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:13:09,427 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 4 states. [2020-09-25 09:13:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:13:12,816 INFO L93 Difference]: Finished difference Result 1488 states and 1948 transitions. [2020-09-25 09:13:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:13:12,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 09:13:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:13:12,852 INFO L225 Difference]: With dead ends: 1488 [2020-09-25 09:13:12,853 INFO L226 Difference]: Without dead ends: 1109 [2020-09-25 09:13:12,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:13:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-09-25 09:13:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1102. [2020-09-25 09:13:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-09-25 09:13:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1345 transitions. [2020-09-25 09:13:12,991 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1345 transitions. Word has length 418 [2020-09-25 09:13:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:13:12,996 INFO L479 AbstractCegarLoop]: Abstraction has 1102 states and 1345 transitions. [2020-09-25 09:13:12,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:13:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1345 transitions. [2020-09-25 09:13:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 09:13:13,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:13,022 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] [2020-09-25 09:13:13,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:13:13,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1571498271, now seen corresponding path program 1 times [2020-09-25 09:13:13,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:13,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421401960] [2020-09-25 09:13:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:13,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:13,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:13,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:13,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:14,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:14,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:14,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:14,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:18,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:18,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 09:13:18,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:13:18,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-09-25 09:13:18,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:18,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:18,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:13:18,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-09-25 09:13:18,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-09-25 09:13:18,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:13:18,693 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 09:13:18,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:18,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:18,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:18,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 09:13:18,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:18,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 09:13:18,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:18,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:18,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:18,957 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 09:13:18,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421401960] [2020-09-25 09:13:18,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:13:18,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:13:18,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997619534] [2020-09-25 09:13:18,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:13:18,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:13:18,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:13:18,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:13:18,966 INFO L87 Difference]: Start difference. First operand 1102 states and 1345 transitions. Second operand 4 states. [2020-09-25 09:13:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:13:21,731 INFO L93 Difference]: Finished difference Result 2222 states and 2792 transitions. [2020-09-25 09:13:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:13:21,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 09:13:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:13:21,743 INFO L225 Difference]: With dead ends: 2222 [2020-09-25 09:13:21,743 INFO L226 Difference]: Without dead ends: 1828 [2020-09-25 09:13:21,746 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 09:13:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-09-25 09:13:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1816. [2020-09-25 09:13:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2020-09-25 09:13:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2253 transitions. [2020-09-25 09:13:21,804 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2253 transitions. Word has length 418 [2020-09-25 09:13:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:13:21,806 INFO L479 AbstractCegarLoop]: Abstraction has 1816 states and 2253 transitions. [2020-09-25 09:13:21,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:13:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2253 transitions. [2020-09-25 09:13:21,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 09:13:21,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:21,816 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] [2020-09-25 09:13:21,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:13:21,817 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:21,818 INFO L82 PathProgramCache]: Analyzing trace with hash 924566943, now seen corresponding path program 1 times [2020-09-25 09:13:21,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:21,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062747845] [2020-09-25 09:13:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:22,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:23,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:23,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:26,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:26,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 09:13:26,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:13:26,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 09:13:26,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:26,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:26,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:13:26,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-09-25 09:13:26,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-09-25 09:13:26,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:27,330 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 09:13:27,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:27,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:27,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:27,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 09:13:27,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:27,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 09:13:27,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:27,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:27,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:27,576 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 09:13:27,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062747845] [2020-09-25 09:13:27,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:13:27,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:13:27,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226381773] [2020-09-25 09:13:27,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:13:27,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:13:27,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:13:27,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:13:27,582 INFO L87 Difference]: Start difference. First operand 1816 states and 2253 transitions. Second operand 4 states. [2020-09-25 09:13:29,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:13:29,948 INFO L93 Difference]: Finished difference Result 3904 states and 4955 transitions. [2020-09-25 09:13:29,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:13:29,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 09:13:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:13:29,963 INFO L225 Difference]: With dead ends: 3904 [2020-09-25 09:13:29,964 INFO L226 Difference]: Without dead ends: 3194 [2020-09-25 09:13:29,966 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 09:13:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-09-25 09:13:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3172. [2020-09-25 09:13:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2020-09-25 09:13:30,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3977 transitions. [2020-09-25 09:13:30,068 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3977 transitions. Word has length 418 [2020-09-25 09:13:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:13:30,069 INFO L479 AbstractCegarLoop]: Abstraction has 3172 states and 3977 transitions. [2020-09-25 09:13:30,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:13:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3977 transitions. [2020-09-25 09:13:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 09:13:30,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:30,083 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] [2020-09-25 09:13:30,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:13:30,083 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:30,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1033201695, now seen corresponding path program 1 times [2020-09-25 09:13:30,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:30,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447921709] [2020-09-25 09:13:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:30,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:30,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:30,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:30,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:30,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:30,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:31,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:33,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:34,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:35,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:35,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 09:13:35,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 09:13:35,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 09:13:35,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:35,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:35,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:13:35,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 166 [2020-09-25 09:13:35,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 09:13:35,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:35,677 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 09:13:35,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:35,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:35,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:35,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 09:13:35,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:35,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 09:13:35,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:35,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:35,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:35,908 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 09:13:35,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447921709] [2020-09-25 09:13:35,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:13:35,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:13:35,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206241542] [2020-09-25 09:13:35,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:13:35,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:13:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:13:35,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:13:35,911 INFO L87 Difference]: Start difference. First operand 3172 states and 3977 transitions. Second operand 5 states. [2020-09-25 09:13:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:13:40,785 INFO L93 Difference]: Finished difference Result 8867 states and 11187 transitions. [2020-09-25 09:13:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:13:40,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-25 09:13:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:13:40,813 INFO L225 Difference]: With dead ends: 8867 [2020-09-25 09:13:40,814 INFO L226 Difference]: Without dead ends: 5977 [2020-09-25 09:13:40,821 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 09:13:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2020-09-25 09:13:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 5975. [2020-09-25 09:13:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5975 states. [2020-09-25 09:13:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 7480 transitions. [2020-09-25 09:13:41,039 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 7480 transitions. Word has length 418 [2020-09-25 09:13:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:13:41,040 INFO L479 AbstractCegarLoop]: Abstraction has 5975 states and 7480 transitions. [2020-09-25 09:13:41,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:13:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 7480 transitions. [2020-09-25 09:13:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-25 09:13:41,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:41,056 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] [2020-09-25 09:13:41,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:13:41,057 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:41,058 INFO L82 PathProgramCache]: Analyzing trace with hash -725792445, now seen corresponding path program 1 times [2020-09-25 09:13:41,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:41,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236199925] [2020-09-25 09:13:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:41,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:41,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:41,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:41,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:42,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:44,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking...