/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+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:49:24,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:49:24,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:49:24,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:49:24,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:49:24,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:49:24,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:49:24,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:49:24,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:49:24,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:49:24,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:49:24,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:49:24,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:49:24,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:49:24,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:49:24,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:49:24,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:49:24,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:49:24,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:49:24,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:49:24,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:49:24,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:49:24,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:49:24,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:49:24,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:49:24,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:49:24,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:49:24,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:49:24,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:49:24,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:49:24,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:49:24,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:49:24,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:49:24,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:49:24,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:49:24,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:49:24,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:49:24,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:49:24,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:49:24,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:49:24,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:49:24,616 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 14:49:24,671 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:49:24,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:49:24,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:49:24,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:49:24,674 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:49:24,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:49:24,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:49:24,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:49:24,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:49:24,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:49:24,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:49:24,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:49:24,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:49:24,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:49:24,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:49:24,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:49:24,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:49:24,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:49:24,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:49:24,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:49:24,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:49:24,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:49:24,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:49:24,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:49:24,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:49:24,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:49:24,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:49:24,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:49:24,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:49:24,680 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 14:49:25,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:49:25,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:49:25,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:49:25,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:49:25,200 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:49:25,201 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 14:49:25,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb8c4445a/b38ade9f34a94dce8bfff2c795a66e6c/FLAGc698a332e [2020-09-25 14:49:25,968 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:49:25,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 14:49:25,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb8c4445a/b38ade9f34a94dce8bfff2c795a66e6c/FLAGc698a332e [2020-09-25 14:49:26,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb8c4445a/b38ade9f34a94dce8bfff2c795a66e6c [2020-09-25 14:49:26,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:49:26,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:49:26,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:49:26,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:49:26,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:49:26,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:49:26" (1/1) ... [2020-09-25 14:49:26,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434f45a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:26, skipping insertion in model container [2020-09-25 14:49:26,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:49:26" (1/1) ... [2020-09-25 14:49:26,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:49:26,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:49:26,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:49:26,955 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:49:27,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:49:27,197 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:49:27,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27 WrapperNode [2020-09-25 14:49:27,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:49:27,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:49:27,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:49:27,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:49:27,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27" (1/1) ... [2020-09-25 14:49:27,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27" (1/1) ... [2020-09-25 14:49:27,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27" (1/1) ... [2020-09-25 14:49:27,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27" (1/1) ... [2020-09-25 14:49:27,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27" (1/1) ... [2020-09-25 14:49:27,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27" (1/1) ... [2020-09-25 14:49:27,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27" (1/1) ... [2020-09-25 14:49:27,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:49:27,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:49:27,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:49:27,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:49:27,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27" (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 14:49:27,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:49:27,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:49:27,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 14:49:27,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:49:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:49:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 14:49:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 14:49:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 14:49:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 14:49:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 14:49:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 14:49:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 14:49:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 14:49:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 14:49:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 14:49:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 14:49:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 14:49:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:49:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:49:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:49:29,420 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:49:29,421 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:49:29,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:49:29 BoogieIcfgContainer [2020-09-25 14:49:29,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:49:29,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:49:29,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:49:29,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:49:29,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:49:26" (1/3) ... [2020-09-25 14:49:29,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f472f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:49:29, skipping insertion in model container [2020-09-25 14:49:29,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:49:27" (2/3) ... [2020-09-25 14:49:29,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f472f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:49:29, skipping insertion in model container [2020-09-25 14:49:29,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:49:29" (3/3) ... [2020-09-25 14:49:29,444 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 14:49:29,457 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:49:29,469 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 14:49:29,491 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 14:49:29,526 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:49:29,526 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:49:29,527 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:49:29,527 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:49:29,527 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:49:29,527 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:49:29,527 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:49:29,527 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:49:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states. [2020-09-25 14:49:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 14:49:29,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:49:29,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:49:29,603 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:49:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:49:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash -219806221, now seen corresponding path program 1 times [2020-09-25 14:49:29,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:49:29,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374352611] [2020-09-25 14:49:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:49:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:30,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:30,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:31,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:31,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:31,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:31,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:31,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:35,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:35,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 14:49:35,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 14:49:35,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-09-25 14:49:35,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:35,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:35,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:49:35,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-09-25 14:49:35,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 14:49:35,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:49:35,943 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 14:49:35,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:49:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:35,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:36,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:36,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 14:49:36,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:49:36,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 14:49:36,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:36,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:36,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:49:36,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:49:36,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:49:36,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:49:36,422 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 14:49:36,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374352611] [2020-09-25 14:49:36,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:49:36,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:49:36,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677338553] [2020-09-25 14:49:36,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:49:36,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:49:36,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:49:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:49:36,456 INFO L87 Difference]: Start difference. First operand 1127 states. Second operand 4 states. [2020-09-25 14:49:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:49:40,659 INFO L93 Difference]: Finished difference Result 1833 states and 2360 transitions. [2020-09-25 14:49:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 14:49:40,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-09-25 14:49:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:49:40,707 INFO L225 Difference]: With dead ends: 1833 [2020-09-25 14:49:40,707 INFO L226 Difference]: Without dead ends: 1303 [2020-09-25 14:49:40,716 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 14:49:40,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-09-25 14:49:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1296. [2020-09-25 14:49:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2020-09-25 14:49:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1545 transitions. [2020-09-25 14:49:40,875 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1545 transitions. Word has length 423 [2020-09-25 14:49:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:49:40,877 INFO L479 AbstractCegarLoop]: Abstraction has 1296 states and 1545 transitions. [2020-09-25 14:49:40,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:49:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1545 transitions. [2020-09-25 14:49:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 14:49:40,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:49:40,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:49:40,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:49:40,885 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:49:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:49:40,886 INFO L82 PathProgramCache]: Analyzing trace with hash -74379501, now seen corresponding path program 1 times [2020-09-25 14:49:40,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:49:40,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654331589] [2020-09-25 14:49:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:49:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:41,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:41,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:41,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:41,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:41,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:41,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:44,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:45,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:45,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:46,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:46,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 14:49:46,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:49:46,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-25 14:49:46,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:46,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:49:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-25 14:49:46,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-25 14:49:46,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 14:49:46,757 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 14:49:46,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:49:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:46,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:46,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:46,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 14:49:46,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:49:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 14:49:46,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:46,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:49:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:49:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:49:46,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:49:47,039 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 14:49:47,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654331589] [2020-09-25 14:49:47,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:49:47,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:49:47,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615163216] [2020-09-25 14:49:47,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:49:47,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:49:47,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:49:47,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:49:47,048 INFO L87 Difference]: Start difference. First operand 1296 states and 1545 transitions. Second operand 5 states. [2020-09-25 14:49:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:49:53,910 INFO L93 Difference]: Finished difference Result 3438 states and 4147 transitions. [2020-09-25 14:49:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:49:53,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2020-09-25 14:49:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:49:53,923 INFO L225 Difference]: With dead ends: 3438 [2020-09-25 14:49:53,923 INFO L226 Difference]: Without dead ends: 2357 [2020-09-25 14:49:53,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:49:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2020-09-25 14:49:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2235. [2020-09-25 14:49:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2235 states. [2020-09-25 14:49:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 2701 transitions. [2020-09-25 14:49:54,014 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 2701 transitions. Word has length 423 [2020-09-25 14:49:54,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:49:54,015 INFO L479 AbstractCegarLoop]: Abstraction has 2235 states and 2701 transitions. [2020-09-25 14:49:54,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:49:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 2701 transitions. [2020-09-25 14:49:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-09-25 14:49:54,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:49:54,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:49:54,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:49:54,025 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:49:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:49:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash -860561599, now seen corresponding path program 1 times [2020-09-25 14:49:54,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:49:54,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059014523] [2020-09-25 14:49:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:49:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:54,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:54,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:54,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:54,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:54,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:54,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:57,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:58,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:58,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:59,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:59,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-09-25 14:49:59,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:49:59,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 14:49:59,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:59,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:49:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-25 14:49:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-25 14:49:59,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:49:59,514 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 14:49:59,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:49:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:49:59,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:49:59,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:49:59,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 14:49:59,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:49:59,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 14:49:59,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:49:59,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:49:59,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:49:59,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:49:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:49:59,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:49:59,835 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 14:49:59,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059014523] [2020-09-25 14:49:59,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:49:59,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:49:59,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931470155] [2020-09-25 14:49:59,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:49:59,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:49:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:49:59,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:49:59,838 INFO L87 Difference]: Start difference. First operand 2235 states and 2701 transitions. Second operand 5 states. [2020-09-25 14:50:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:50:05,682 INFO L93 Difference]: Finished difference Result 6165 states and 7497 transitions. [2020-09-25 14:50:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:50:05,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 424 [2020-09-25 14:50:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:50:05,704 INFO L225 Difference]: With dead ends: 6165 [2020-09-25 14:50:05,704 INFO L226 Difference]: Without dead ends: 4137 [2020-09-25 14:50:05,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:50:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2020-09-25 14:50:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 4029. [2020-09-25 14:50:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4029 states. [2020-09-25 14:50:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 4886 transitions. [2020-09-25 14:50:05,852 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 4886 transitions. Word has length 424 [2020-09-25 14:50:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:50:05,852 INFO L479 AbstractCegarLoop]: Abstraction has 4029 states and 4886 transitions. [2020-09-25 14:50:05,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:50:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 4886 transitions. [2020-09-25 14:50:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-25 14:50:05,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:05,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:50:05,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:50:05,870 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash -210565487, now seen corresponding path program 1 times [2020-09-25 14:50:05,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:05,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109107810] [2020-09-25 14:50:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:06,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:06,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:06,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:06,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:06,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:07,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:08,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:08,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:08,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:09,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:09,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:10,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:10,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-09-25 14:50:10,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 14:50:10,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 14:50:10,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:10,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:10,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:50:10,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-09-25 14:50:10,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-25 14:50:10,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:11,332 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 14:50:11,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:50:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:11,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:11,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:11,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 14:50:11,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:50:11,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 14:50:11,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:11,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:11,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:50:11,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:50:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:50:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:11,561 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 14:50:11,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109107810] [2020-09-25 14:50:11,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:50:11,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:50:11,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51712537] [2020-09-25 14:50:11,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:50:11,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:50:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:50:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:50:11,564 INFO L87 Difference]: Start difference. First operand 4029 states and 4886 transitions. Second operand 5 states.