/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=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:34:21,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:34:21,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:34:21,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:34:21,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:34:21,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:34:21,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:34:21,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:34:21,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:34:21,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:34:21,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:34:21,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:34:21,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:34:21,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:34:21,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:34:21,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:34:21,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:34:21,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:34:21,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:34:21,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:34:21,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:34:21,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:34:21,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:34:21,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:34:21,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:34:21,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:34:21,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:34:21,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:34:21,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:34:21,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:34:21,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:34:21,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:34:21,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:34:21,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:34:21,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:34:21,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:34:21,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:34:21,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:34:21,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:34:21,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:34:21,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:34:21,799 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 12:34:21,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:34:21,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:34:21,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:34:21,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:34:21,843 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:34:21,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:34:21,844 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:34:21,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:34:21,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:34:21,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:34:21,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:34:21,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:34:21,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:34:21,845 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:34:21,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:34:21,845 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:34:21,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:34:21,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:34:21,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:34:21,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:34:21,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:34:21,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:34:21,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:34:21,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:34:21,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:34:21,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:34:21,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:34:21,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:34:21,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:34:21,850 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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;log-additional-information=true; [2020-09-25 12:34:22,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:34:22,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:34:22,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:34:22,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:34:22,391 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:34:22,392 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 12:34:22,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd5d0d237/7d47fdef215b452a9ae11e38ca680efa/FLAG710d5488e [2020-09-25 12:34:23,141 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:34:23,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 12:34:23,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd5d0d237/7d47fdef215b452a9ae11e38ca680efa/FLAG710d5488e [2020-09-25 12:34:23,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd5d0d237/7d47fdef215b452a9ae11e38ca680efa [2020-09-25 12:34:23,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:34:23,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:34:23,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:34:23,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:34:23,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:34:23,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:34:23" (1/1) ... [2020-09-25 12:34:23,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30198e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:23, skipping insertion in model container [2020-09-25 12:34:23,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:34:23" (1/1) ... [2020-09-25 12:34:23,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:34:23,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:34:24,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:34:24,149 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:34:24,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:34:24,348 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:34:24,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24 WrapperNode [2020-09-25 12:34:24,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:34:24,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:34:24,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:34:24,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:34:24,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24" (1/1) ... [2020-09-25 12:34:24,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24" (1/1) ... [2020-09-25 12:34:24,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24" (1/1) ... [2020-09-25 12:34:24,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24" (1/1) ... [2020-09-25 12:34:24,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24" (1/1) ... [2020-09-25 12:34:24,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24" (1/1) ... [2020-09-25 12:34:24,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24" (1/1) ... [2020-09-25 12:34:24,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:34:24,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:34:24,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:34:24,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:34:24,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24" (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 12:34:24,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:34:24,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:34:24,573 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 12:34:24,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:34:24,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:34:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 12:34:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 12:34:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 12:34:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 12:34:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 12:34:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 12:34:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 12:34:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 12:34:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 12:34:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 12:34:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 12:34:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 12:34:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:34:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:34:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:34:26,404 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:34:26,404 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 12:34:26,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:34:26 BoogieIcfgContainer [2020-09-25 12:34:26,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:34:26,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:34:26,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:34:26,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:34:26,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:34:23" (1/3) ... [2020-09-25 12:34:26,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f755a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:34:26, skipping insertion in model container [2020-09-25 12:34:26,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:24" (2/3) ... [2020-09-25 12:34:26,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f755a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:34:26, skipping insertion in model container [2020-09-25 12:34:26,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:34:26" (3/3) ... [2020-09-25 12:34:26,443 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 12:34:26,459 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:34:26,476 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:34:26,500 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:34:26,542 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:34:26,543 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:34:26,543 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:34:26,543 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:34:26,543 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:34:26,543 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:34:26,543 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:34:26,544 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:34:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-25 12:34:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 12:34:26,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:34:26,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:34:26,648 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:34:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:34:26,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-25 12:34:26,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:34:26,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122216117] [2020-09-25 12:34:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:34:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:27,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:27,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:28,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:28,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:28,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:28,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:29,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:32,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:32,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 12:34:32,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:34:32,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 12:34:32,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:32,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:32,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:34:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-09-25 12:34:32,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 12:34:32,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 12:34:33,075 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 12:34:33,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:34:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:33,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:33,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 12:34:33,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:34:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-25 12:34:33,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:33,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:33,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:34:33,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:34:33,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:34:33,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:33,466 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 12:34:33,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122216117] [2020-09-25 12:34:33,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:34:33,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:34:33,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734286292] [2020-09-25 12:34:33,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:34:33,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:34:33,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:34:33,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:34:33,502 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 4 states. [2020-09-25 12:34:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:34:36,770 INFO L93 Difference]: Finished difference Result 1488 states and 1948 transitions. [2020-09-25 12:34:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 12:34:36,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 12:34:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:34:36,809 INFO L225 Difference]: With dead ends: 1488 [2020-09-25 12:34:36,810 INFO L226 Difference]: Without dead ends: 1109 [2020-09-25 12:34:36,817 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 12:34:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-09-25 12:34:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1102. [2020-09-25 12:34:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-09-25 12:34:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1345 transitions. [2020-09-25 12:34:36,939 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1345 transitions. Word has length 418 [2020-09-25 12:34:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:34:36,941 INFO L479 AbstractCegarLoop]: Abstraction has 1102 states and 1345 transitions. [2020-09-25 12:34:36,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:34:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1345 transitions. [2020-09-25 12:34:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 12:34:36,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:34:36,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:34:36,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:34:36,962 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:34:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:34:36,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1571498271, now seen corresponding path program 1 times [2020-09-25 12:34:36,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:34:36,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226040188] [2020-09-25 12:34:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:34:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:37,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:37,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:37,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:42,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:42,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 12:34:42,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:34:42,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 12:34:42,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:42,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:42,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:34:42,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-09-25 12:34:42,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-09-25 12:34:42,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:42,646 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 12:34:42,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:34:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:42,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:42,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:42,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 12:34:42,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:34:42,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 12:34:42,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:42,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:42,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:34:42,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:34:42,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:34:42,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:34:43,138 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 12:34:43,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226040188] [2020-09-25 12:34:43,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:34:43,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:34:43,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32022462] [2020-09-25 12:34:43,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:34:43,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:34:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:34:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:34:43,147 INFO L87 Difference]: Start difference. First operand 1102 states and 1345 transitions. Second operand 4 states. [2020-09-25 12:34:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:34:45,866 INFO L93 Difference]: Finished difference Result 2222 states and 2792 transitions. [2020-09-25 12:34:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 12:34:45,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 12:34:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:34:45,878 INFO L225 Difference]: With dead ends: 2222 [2020-09-25 12:34:45,879 INFO L226 Difference]: Without dead ends: 1828 [2020-09-25 12:34:45,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:34:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-09-25 12:34:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1816. [2020-09-25 12:34:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2020-09-25 12:34:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2253 transitions. [2020-09-25 12:34:45,939 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2253 transitions. Word has length 418 [2020-09-25 12:34:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:34:45,940 INFO L479 AbstractCegarLoop]: Abstraction has 1816 states and 2253 transitions. [2020-09-25 12:34:45,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:34:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2253 transitions. [2020-09-25 12:34:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 12:34:45,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:34:45,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:34:45,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:34:45,950 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:34:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:34:45,951 INFO L82 PathProgramCache]: Analyzing trace with hash 924566943, now seen corresponding path program 1 times [2020-09-25 12:34:45,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:34:45,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006734781] [2020-09-25 12:34:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:34:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:46,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:46,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:46,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:46,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:46,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:46,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:47,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:47,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:51,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:51,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 12:34:51,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:34:51,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 12:34:51,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:51,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:34:51,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-09-25 12:34:51,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-09-25 12:34:51,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:51,569 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 12:34:51,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:34:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:51,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:51,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:51,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 12:34:51,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:34:51,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 12:34:51,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:51,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:51,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:34:51,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:34:51,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:34:51,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:51,824 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 12:34:51,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006734781] [2020-09-25 12:34:51,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:34:51,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:34:51,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877601761] [2020-09-25 12:34:51,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:34:51,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:34:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:34:51,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:34:51,828 INFO L87 Difference]: Start difference. First operand 1816 states and 2253 transitions. Second operand 4 states. [2020-09-25 12:34:54,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:34:54,522 INFO L93 Difference]: Finished difference Result 3904 states and 4955 transitions. [2020-09-25 12:34:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 12:34:54,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 12:34:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:34:54,539 INFO L225 Difference]: With dead ends: 3904 [2020-09-25 12:34:54,540 INFO L226 Difference]: Without dead ends: 3194 [2020-09-25 12:34:54,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:34:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-09-25 12:34:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3172. [2020-09-25 12:34:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2020-09-25 12:34:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3977 transitions. [2020-09-25 12:34:54,651 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3977 transitions. Word has length 418 [2020-09-25 12:34:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:34:54,652 INFO L479 AbstractCegarLoop]: Abstraction has 3172 states and 3977 transitions. [2020-09-25 12:34:54,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:34:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3977 transitions. [2020-09-25 12:34:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 12:34:54,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:34:54,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:34:54,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:34:54,673 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:34:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:34:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1033201695, now seen corresponding path program 1 times [2020-09-25 12:34:54,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:34:54,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94213027] [2020-09-25 12:34:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:34:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:55,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:55,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:55,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:55,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:55,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:58,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:58,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:59,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:59,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:59,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 12:34:59,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 12:34:59,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-25 12:34:59,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:59,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:34:59,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 166 [2020-09-25 12:34:59,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 12:34:59,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:00,433 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 12:35:00,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:35:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:00,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:00,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:00,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 12:35:00,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:35:00,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 12:35:00,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:00,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:35:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:35:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:35:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:01,045 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 12:35:01,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94213027] [2020-09-25 12:35:01,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:35:01,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:35:01,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813985330] [2020-09-25 12:35:01,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:35:01,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:35:01,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:35:01,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:35:01,048 INFO L87 Difference]: Start difference. First operand 3172 states and 3977 transitions. Second operand 5 states. [2020-09-25 12:35:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:35:06,144 INFO L93 Difference]: Finished difference Result 8867 states and 11187 transitions. [2020-09-25 12:35:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:35:06,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-25 12:35:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:35:06,181 INFO L225 Difference]: With dead ends: 8867 [2020-09-25 12:35:06,181 INFO L226 Difference]: Without dead ends: 5977 [2020-09-25 12:35:06,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:35:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2020-09-25 12:35:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 5975. [2020-09-25 12:35:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5975 states. [2020-09-25 12:35:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 7480 transitions. [2020-09-25 12:35:06,432 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 7480 transitions. Word has length 418 [2020-09-25 12:35:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:35:06,433 INFO L479 AbstractCegarLoop]: Abstraction has 5975 states and 7480 transitions. [2020-09-25 12:35:06,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:35:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 7480 transitions. [2020-09-25 12:35:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-25 12:35:06,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:35:06,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:35:06,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:35:06,449 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:35:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:35:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash -725792445, now seen corresponding path program 1 times [2020-09-25 12:35:06,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:35:06,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268220673] [2020-09-25 12:35:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:35:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:06,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:06,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:06,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:06,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:07,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:07,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:07,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking...