/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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 14:49:37,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:49:37,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:49:37,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:49:37,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:49:37,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:49:37,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:49:37,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:49:37,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:49:37,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:49:37,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:49:37,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:49:37,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:49:37,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:49:37,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:49:37,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:49:37,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:49:37,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:49:37,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:49:37,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:49:37,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:49:37,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:49:37,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:49:37,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:49:37,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:49:37,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:49:37,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:49:37,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:49:37,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:49:37,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:49:37,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:49:37,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:49:37,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:49:37,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:49:37,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:49:37,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:49:37,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:49:37,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:49:37,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:49:37,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:49:37,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:49:37,226 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 14:49:37,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:49:37,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:49:37,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:49:37,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:49:37,252 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:49:37,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:49:37,252 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:49:37,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:49:37,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:49:37,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:49:37,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:49:37,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:49:37,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:49:37,254 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:49:37,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:49:37,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:49:37,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:49:37,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:49:37,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:49:37,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:49:37,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:49:37,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:49:37,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:49:37,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:49:37,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:49:37,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:49:37,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:49:37,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:49:37,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:49:37,257 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:49:37,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:49:37,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:49:37,735 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:49:37,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:49:37,738 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:49:37,739 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 14:49:37,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60d669ee8/f196f477a3454205a9551ae60377835d/FLAGfff47a6e2 [2020-09-25 14:49:38,502 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:49:38,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 14:49:38,520 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60d669ee8/f196f477a3454205a9551ae60377835d/FLAGfff47a6e2 [2020-09-25 14:49:38,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60d669ee8/f196f477a3454205a9551ae60377835d [2020-09-25 14:49:38,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:49:38,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:49:38,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:49:38,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:49:38,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:49:38,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:49:38" (1/1) ... [2020-09-25 14:49:38,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6f757b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:38, skipping insertion in model container [2020-09-25 14:49:38,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:49:38" (1/1) ... [2020-09-25 14:49:38,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:49:38,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:49:39,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:49:39,425 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:49:39,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:49:39,625 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:49:39,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39 WrapperNode [2020-09-25 14:49:39,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:49:39,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:49:39,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:49:39,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:49:39,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39" (1/1) ... [2020-09-25 14:49:39,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39" (1/1) ... [2020-09-25 14:49:39,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39" (1/1) ... [2020-09-25 14:49:39,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39" (1/1) ... [2020-09-25 14:49:39,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39" (1/1) ... [2020-09-25 14:49:39,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39" (1/1) ... [2020-09-25 14:49:39,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39" (1/1) ... [2020-09-25 14:49:39,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:49:39,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:49:39,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:49:39,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:49:39,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39" (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 14:49:39,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:49:39,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:49:39,824 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 14:49:39,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:49:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:49:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 14:49:39,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 14:49:39,826 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 14:49:39,826 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 14:49:39,827 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 14:49:39,827 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 14:49:39,827 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 14:49:39,827 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 14:49:39,828 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 14:49:39,828 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 14:49:39,829 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 14:49:39,830 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 14:49:39,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:49:39,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:49:39,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:49:41,587 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:49:41,588 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:49:41,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:49:41 BoogieIcfgContainer [2020-09-25 14:49:41,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:49:41,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:49:41,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:49:41,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:49:41,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:49:38" (1/3) ... [2020-09-25 14:49:41,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74966c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:49:41, skipping insertion in model container [2020-09-25 14:49:41,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:39" (2/3) ... [2020-09-25 14:49:41,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74966c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:49:41, skipping insertion in model container [2020-09-25 14:49:41,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:49:41" (3/3) ... [2020-09-25 14:49:41,610 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 14:49:41,626 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:49:41,638 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:49:41,661 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:49:41,704 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:49:41,704 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:49:41,705 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:49:41,705 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:49:41,705 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:49:41,705 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:49:41,705 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:49:41,706 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:49:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-25 14:49:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 14:49:41,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:49:41,805 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 14:49:41,806 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:49:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:49:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-25 14:49:41,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:49:41,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178146740] [2020-09-25 14:49:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:49:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:42,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:42,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:43,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:43,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:43,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:43,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:44,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:44,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:47,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:47,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 14:49:47,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:49:47,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-09-25 14:49:47,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:47,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:49:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-09-25 14:49:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 14:49:47,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 14:49:48,219 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 14:49:48,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:49:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:48,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:48,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:48,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 14:49:48,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:49:48,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-25 14:49:48,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:48,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:49:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:49:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:49:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:49:48,699 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 14:49:48,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178146740] [2020-09-25 14:49:48,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:49:48,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:49:48,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370137650] [2020-09-25 14:49:48,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:49:48,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:49:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:49:48,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:49:48,736 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 4 states. [2020-09-25 14:49:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:49:52,111 INFO L93 Difference]: Finished difference Result 1488 states and 1948 transitions. [2020-09-25 14:49:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 14:49:52,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 14:49:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:49:52,148 INFO L225 Difference]: With dead ends: 1488 [2020-09-25 14:49:52,148 INFO L226 Difference]: Without dead ends: 1109 [2020-09-25 14:49:52,156 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 14:49:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-09-25 14:49:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1102. [2020-09-25 14:49:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-09-25 14:49:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1345 transitions. [2020-09-25 14:49:52,303 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1345 transitions. Word has length 418 [2020-09-25 14:49:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:49:52,305 INFO L479 AbstractCegarLoop]: Abstraction has 1102 states and 1345 transitions. [2020-09-25 14:49:52,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:49:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1345 transitions. [2020-09-25 14:49:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 14:49:52,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:49:52,316 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 14:49:52,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:49:52,316 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:49:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:49:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1571498271, now seen corresponding path program 1 times [2020-09-25 14:49:52,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:49:52,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842362043] [2020-09-25 14:49:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:49:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:52,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:52,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:53,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:53,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:53,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:53,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:53,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:57,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:57,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 14:49:57,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:49:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-25 14:49:57,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:57,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:57,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:49:57,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-09-25 14:49:57,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-09-25 14:49:57,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:49:57,911 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 14:49:57,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:49:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:57,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:57,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:57,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 14:49:57,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:49:57,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 14:49:57,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:57,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:57,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:49:57,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:49:57,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:49:57,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:49:58,252 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 14:49:58,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842362043] [2020-09-25 14:49:58,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:49:58,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:49:58,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236021431] [2020-09-25 14:49:58,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:49:58,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:49:58,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:49:58,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:49:58,261 INFO L87 Difference]: Start difference. First operand 1102 states and 1345 transitions. Second operand 4 states. [2020-09-25 14:50:01,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:50:01,165 INFO L93 Difference]: Finished difference Result 2222 states and 2792 transitions. [2020-09-25 14:50:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 14:50:01,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 14:50:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:50:01,178 INFO L225 Difference]: With dead ends: 2222 [2020-09-25 14:50:01,178 INFO L226 Difference]: Without dead ends: 1828 [2020-09-25 14:50:01,185 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 14:50:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-09-25 14:50:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1816. [2020-09-25 14:50:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2020-09-25 14:50:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2253 transitions. [2020-09-25 14:50:01,256 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2253 transitions. Word has length 418 [2020-09-25 14:50:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:50:01,258 INFO L479 AbstractCegarLoop]: Abstraction has 1816 states and 2253 transitions. [2020-09-25 14:50:01,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:50:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2253 transitions. [2020-09-25 14:50:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 14:50:01,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:01,268 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 14:50:01,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:50:01,268 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash 924566943, now seen corresponding path program 1 times [2020-09-25 14:50:01,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:01,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488556900] [2020-09-25 14:50:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:01,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:01,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:01,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:02,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:02,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:02,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:02,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:02,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:06,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:06,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 14:50:06,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:50:06,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-09-25 14:50:06,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:06,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:50:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-09-25 14:50:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-09-25 14:50:06,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:06,791 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 14:50:06,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:50:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:06,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:06,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:06,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 14:50:06,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:50:06,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-25 14:50:06,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:06,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:06,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:50:06,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:50:06,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:50:06,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:07,083 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 14:50:07,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488556900] [2020-09-25 14:50:07,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:50:07,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:50:07,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383014955] [2020-09-25 14:50:07,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:50:07,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:50:07,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:50:07,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:50:07,087 INFO L87 Difference]: Start difference. First operand 1816 states and 2253 transitions. Second operand 4 states. [2020-09-25 14:50:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:50:09,664 INFO L93 Difference]: Finished difference Result 3904 states and 4955 transitions. [2020-09-25 14:50:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 14:50:09,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 14:50:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:50:09,683 INFO L225 Difference]: With dead ends: 3904 [2020-09-25 14:50:09,683 INFO L226 Difference]: Without dead ends: 3194 [2020-09-25 14:50:09,687 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 14:50:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-09-25 14:50:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3172. [2020-09-25 14:50:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2020-09-25 14:50:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3977 transitions. [2020-09-25 14:50:09,784 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3977 transitions. Word has length 418 [2020-09-25 14:50:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:50:09,785 INFO L479 AbstractCegarLoop]: Abstraction has 3172 states and 3977 transitions. [2020-09-25 14:50:09,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:50:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3977 transitions. [2020-09-25 14:50:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 14:50:09,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:09,801 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 14:50:09,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:50:09,801 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1033201695, now seen corresponding path program 1 times [2020-09-25 14:50:09,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:09,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206669741] [2020-09-25 14:50:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:10,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:10,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:10,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:10,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:11,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:14,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:14,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:14,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:14,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:14,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 14:50:14,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 14:50:14,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 14:50:14,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:14,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:50:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-25 14:50:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-25 14:50:14,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:15,403 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 14:50:15,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:50:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:15,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:15,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:15,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 14:50:15,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:50:15,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 14:50:15,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:15,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:50:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:50:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:50:15,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:15,652 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 14:50:15,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206669741] [2020-09-25 14:50:15,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:50:15,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:50:15,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244422876] [2020-09-25 14:50:15,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:50:15,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:50:15,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:50:15,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:50:15,655 INFO L87 Difference]: Start difference. First operand 3172 states and 3977 transitions. Second operand 5 states. [2020-09-25 14:50:20,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:50:20,643 INFO L93 Difference]: Finished difference Result 8960 states and 11297 transitions. [2020-09-25 14:50:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:50:20,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-25 14:50:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:50:20,675 INFO L225 Difference]: With dead ends: 8960 [2020-09-25 14:50:20,675 INFO L226 Difference]: Without dead ends: 5996 [2020-09-25 14:50:20,684 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 14:50:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2020-09-25 14:50:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5994. [2020-09-25 14:50:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5994 states. [2020-09-25 14:50:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5994 states to 5994 states and 7509 transitions. [2020-09-25 14:50:20,928 INFO L78 Accepts]: Start accepts. Automaton has 5994 states and 7509 transitions. Word has length 418 [2020-09-25 14:50:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:50:20,929 INFO L479 AbstractCegarLoop]: Abstraction has 5994 states and 7509 transitions. [2020-09-25 14:50:20,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:50:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5994 states and 7509 transitions. [2020-09-25 14:50:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-25 14:50:20,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:20,947 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 14:50:20,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:50:20,948 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2033457773, now seen corresponding path program 1 times [2020-09-25 14:50:20,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:20,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66275964] [2020-09-25 14:50:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:21,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:21,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:21,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:21,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:22,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking...