/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=HIGHLEXORDER --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.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:58:27,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:58:27,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:58:27,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:58:27,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:58:27,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:58:27,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:58:27,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:58:27,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:58:27,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:58:27,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:58:27,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:58:27,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:58:27,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:58:27,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:58:27,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:58:27,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:58:27,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:58:27,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:58:27,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:58:27,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:58:27,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:58:27,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:58:27,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:58:27,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:58:27,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:58:27,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:58:27,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:58:27,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:58:27,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:58:27,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:58:27,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:58:27,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:58:27,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:58:27,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:58:27,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:58:27,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:58:27,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:58:27,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:58:27,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:58:27,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:58:27,163 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 [2020-09-24 22:58:27,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:58:27,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:58:27,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:58:27,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:58:27,222 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:58:27,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:58:27,222 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:58:27,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:58:27,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:58:27,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:58:27,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:58:27,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:58:27,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:58:27,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:58:27,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:58:27,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:58:27,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:58:27,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:58:27,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:58:27,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:58:27,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:58:27,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:58:27,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:58:27,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:58:27,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:58:27,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:58:27,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:58:27,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:58:27,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:58:27,229 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:58:27,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:58:27,686 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:58:27,690 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:58:27,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:58:27,693 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:58:27,694 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 22:58:27,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/731337c07/3f05794879f54f559357e2e2756b2a41/FLAG00daca173 [2020-09-24 22:58:28,411 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:58:28,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 22:58:28,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/731337c07/3f05794879f54f559357e2e2756b2a41/FLAG00daca173 [2020-09-24 22:58:28,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/731337c07/3f05794879f54f559357e2e2756b2a41 [2020-09-24 22:58:28,689 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:58:28,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:58:28,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:58:28,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:58:28,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:58:28,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:28" (1/1) ... [2020-09-24 22:58:28,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43889371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:28, skipping insertion in model container [2020-09-24 22:58:28,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:28" (1/1) ... [2020-09-24 22:58:28,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:58:28,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:58:29,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:58:29,382 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:58:29,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:58:29,570 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:58:29,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29 WrapperNode [2020-09-24 22:58:29,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:58:29,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:58:29,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:58:29,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:58:29,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29" (1/1) ... [2020-09-24 22:58:29,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29" (1/1) ... [2020-09-24 22:58:29,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29" (1/1) ... [2020-09-24 22:58:29,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29" (1/1) ... [2020-09-24 22:58:29,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29" (1/1) ... [2020-09-24 22:58:29,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29" (1/1) ... [2020-09-24 22:58:29,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29" (1/1) ... [2020-09-24 22:58:29,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:58:29,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:58:29,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:58:29,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:58:29,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29" (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 [2020-09-24 22:58:29,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:58:29,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:58:29,787 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 22:58:29,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:58:29,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:58:29,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 22:58:29,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 22:58:29,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 22:58:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 22:58:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 22:58:29,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 22:58:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 22:58:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 22:58:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 22:58:29,790 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 22:58:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 22:58:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 22:58:29,791 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 22:58:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:58:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:58:29,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:58:31,388 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:58:31,389 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 22:58:31,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:58:31 BoogieIcfgContainer [2020-09-24 22:58:31,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:58:31,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:58:31,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:58:31,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:58:31,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:58:28" (1/3) ... [2020-09-24 22:58:31,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e23ea90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:58:31, skipping insertion in model container [2020-09-24 22:58:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:29" (2/3) ... [2020-09-24 22:58:31,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e23ea90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:58:31, skipping insertion in model container [2020-09-24 22:58:31,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:58:31" (3/3) ... [2020-09-24 22:58:31,411 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 22:58:31,424 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:58:31,436 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:58:31,457 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:58:31,490 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:58:31,490 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:58:31,490 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:58:31,490 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:58:31,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:58:31,491 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:58:31,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:58:31,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:58:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 22:58:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-24 22:58:31,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:58:31,571 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] [2020-09-24 22:58:31,571 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:58:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:58:31,580 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-24 22:58:31,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:58:31,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659525596] [2020-09-24 22:58:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:58:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:32,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:32,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:33,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:33,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:33,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:33,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:36,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:37,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:37,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-24 22:58:37,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:58:37,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-24 22:58:37,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:37,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 22:58:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-24 22:58:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 22:58:37,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 22:58:37,861 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 22:58:37,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:58:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:37,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:37,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:37,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 22:58:37,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:58:37,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 22:58:37,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:58:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:58:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:58:37,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:58:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:58:38,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659525596] [2020-09-24 22:58:38,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:58:38,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:58:38,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496178021] [2020-09-24 22:58:38,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:58:38,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:58:38,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:58:38,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:58:38,276 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-24 22:58:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:58:44,490 INFO L93 Difference]: Finished difference Result 1918 states and 2543 transitions. [2020-09-24 22:58:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 22:58:44,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-24 22:58:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:58:44,527 INFO L225 Difference]: With dead ends: 1918 [2020-09-24 22:58:44,527 INFO L226 Difference]: Without dead ends: 1238 [2020-09-24 22:58:44,536 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 [2020-09-24 22:58:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2020-09-24 22:58:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1236. [2020-09-24 22:58:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1236 states. [2020-09-24 22:58:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1506 transitions. [2020-09-24 22:58:44,681 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1506 transitions. Word has length 407 [2020-09-24 22:58:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:58:44,682 INFO L479 AbstractCegarLoop]: Abstraction has 1236 states and 1506 transitions. [2020-09-24 22:58:44,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:58:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1506 transitions. [2020-09-24 22:58:44,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-24 22:58:44,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:58:44,694 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] [2020-09-24 22:58:44,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:58:44,695 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:58:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:58:44,696 INFO L82 PathProgramCache]: Analyzing trace with hash -390420257, now seen corresponding path program 1 times [2020-09-24 22:58:44,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:58:44,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108935369] [2020-09-24 22:58:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:58:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:44,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:44,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:45,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:45,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:45,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:46,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:49,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:49,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:49,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:49,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-24 22:58:49,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:58:49,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-24 22:58:49,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:49,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:58:49,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-09-24 22:58:49,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 22:58:49,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:58:50,093 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 22:58:50,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:58:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:50,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:50,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:50,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 22:58:50,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:58:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 22:58:50,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:58:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:58:50,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:58:50,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:58:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:58:50,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108935369] [2020-09-24 22:58:50,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:58:50,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:58:50,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225786894] [2020-09-24 22:58:50,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:58:50,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:58:50,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:58:50,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:58:50,317 INFO L87 Difference]: Start difference. First operand 1236 states and 1506 transitions. Second operand 4 states. [2020-09-24 22:58:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:58:53,367 INFO L93 Difference]: Finished difference Result 3237 states and 3987 transitions. [2020-09-24 22:58:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:58:53,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 408 [2020-09-24 22:58:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:58:53,388 INFO L225 Difference]: With dead ends: 3237 [2020-09-24 22:58:53,388 INFO L226 Difference]: Without dead ends: 2239 [2020-09-24 22:58:53,392 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 [2020-09-24 22:58:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2020-09-24 22:58:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1242. [2020-09-24 22:58:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1242 states. [2020-09-24 22:58:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1514 transitions. [2020-09-24 22:58:53,480 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1514 transitions. Word has length 408 [2020-09-24 22:58:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:58:53,482 INFO L479 AbstractCegarLoop]: Abstraction has 1242 states and 1514 transitions. [2020-09-24 22:58:53,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:58:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1514 transitions. [2020-09-24 22:58:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 22:58:53,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:58:53,491 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] [2020-09-24 22:58:53,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:58:53,491 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:58:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:58:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1544674437, now seen corresponding path program 1 times [2020-09-24 22:58:53,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:58:53,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825532392] [2020-09-24 22:58:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:58:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:53,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:53,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:53,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:54,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:54,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:54,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:54,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:57,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:57,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:57,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:58,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:58,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-24 22:58:58,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 22:58:58,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-24 22:58:58,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:58,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:58:58,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-24 22:58:58,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-09-24 22:58:58,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:58:59,052 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 22:58:59,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:58:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:59,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:59,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:59,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 22:58:59,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:58:59,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 22:58:59,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:59,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:58:59,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:58:59,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:58:59,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:58:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:58:59,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825532392] [2020-09-24 22:58:59,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:58:59,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:58:59,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558851781] [2020-09-24 22:58:59,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:58:59,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:58:59,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:58:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:58:59,386 INFO L87 Difference]: Start difference. First operand 1242 states and 1514 transitions. Second operand 4 states. [2020-09-24 22:59:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:03,626 INFO L93 Difference]: Finished difference Result 3078 states and 3802 transitions. [2020-09-24 22:59:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:59:03,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 409 [2020-09-24 22:59:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:03,644 INFO L225 Difference]: With dead ends: 3078 [2020-09-24 22:59:03,644 INFO L226 Difference]: Without dead ends: 2178 [2020-09-24 22:59:03,646 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 [2020-09-24 22:59:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2020-09-24 22:59:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 2176. [2020-09-24 22:59:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2176 states. [2020-09-24 22:59:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 2657 transitions. [2020-09-24 22:59:03,735 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 2657 transitions. Word has length 409 [2020-09-24 22:59:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:03,736 INFO L479 AbstractCegarLoop]: Abstraction has 2176 states and 2657 transitions. [2020-09-24 22:59:03,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:59:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 2657 transitions. [2020-09-24 22:59:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 22:59:03,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:03,743 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] [2020-09-24 22:59:03,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:59:03,744 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:03,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1174901755, now seen corresponding path program 1 times [2020-09-24 22:59:03,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:03,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091237831] [2020-09-24 22:59:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:03,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:07,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:07,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:08,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:08,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-24 22:59:08,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 22:59:08,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 22:59:08,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:08,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 22:59:08,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 162 [2020-09-24 22:59:08,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-09-24 22:59:08,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:59:09,322 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 22:59:09,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:59:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:09,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:09,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:59:09,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 22:59:09,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:59:09,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 22:59:09,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:59:09,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:59:09,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:59:09,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:59:09,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:59:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:59:09,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091237831] [2020-09-24 22:59:09,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:59:09,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:59:09,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230274184] [2020-09-24 22:59:09,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:59:09,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:59:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:59:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:59:09,703 INFO L87 Difference]: Start difference. First operand 2176 states and 2657 transitions. Second operand 5 states. [2020-09-24 22:59:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:14,366 INFO L93 Difference]: Finished difference Result 5552 states and 6852 transitions. [2020-09-24 22:59:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:59:14,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-24 22:59:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:14,383 INFO L225 Difference]: With dead ends: 5552 [2020-09-24 22:59:14,383 INFO L226 Difference]: Without dead ends: 3938 [2020-09-24 22:59:14,389 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 [2020-09-24 22:59:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-09-24 22:59:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3936. [2020-09-24 22:59:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3936 states. [2020-09-24 22:59:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 4820 transitions. [2020-09-24 22:59:14,568 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 4820 transitions. Word has length 409 [2020-09-24 22:59:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:14,569 INFO L479 AbstractCegarLoop]: Abstraction has 3936 states and 4820 transitions. [2020-09-24 22:59:14,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:59:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 4820 transitions. [2020-09-24 22:59:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 22:59:14,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:14,579 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] [2020-09-24 22:59:14,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:59:14,579 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1783103494, now seen corresponding path program 1 times [2020-09-24 22:59:14,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:14,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096395537] [2020-09-24 22:59:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:14,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:14,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:15,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:15,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:15,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:15,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking...