/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:33:18,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:33:18,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:33:18,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:33:18,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:33:18,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:33:18,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:33:18,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:33:18,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:33:18,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:33:18,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:33:18,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:33:18,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:33:18,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:33:18,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:33:18,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:33:18,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:33:18,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:33:18,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:33:18,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:33:18,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:33:18,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:33:18,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:33:18,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:33:18,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:33:18,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:33:18,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:33:18,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:33:18,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:33:18,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:33:18,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:33:18,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:33:18,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:33:18,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:33:18,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:33:18,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:33:18,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:33:18,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:33:18,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:33:18,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:33:18,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:33:18,582 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 [2020-10-14 08:33:18,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:33:18,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:33:18,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:33:18,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:33:18,630 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:33:18,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:33:18,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:33:18,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:33:18,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:33:18,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:33:18,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:33:18,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:33:18,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:33:18,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:33:18,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:33:18,632 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:33:18,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:33:18,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:33:18,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:33:18,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:33:18,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:33:18,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:33:18,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:33:18,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:33:18,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:33:18,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:33:18,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:33:18,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:33:18,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:33:18,637 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:33:18,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:33:18,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:33:18,983 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:33:18,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:33:18,985 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:33:18,986 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-14 08:33:19,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/393ff5c1f/2ecdf900d8c84dd0a05151ce0d7b4705/FLAG91d67a46d [2020-10-14 08:33:19,745 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:33:19,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-14 08:33:19,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/393ff5c1f/2ecdf900d8c84dd0a05151ce0d7b4705/FLAG91d67a46d [2020-10-14 08:33:19,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/393ff5c1f/2ecdf900d8c84dd0a05151ce0d7b4705 [2020-10-14 08:33:19,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:33:19,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:33:19,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:33:19,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:33:19,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:33:19,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:33:19" (1/1) ... [2020-10-14 08:33:19,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1225839d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:19, skipping insertion in model container [2020-10-14 08:33:19,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:33:19" (1/1) ... [2020-10-14 08:33:19,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:33:20,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:33:21,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:33:21,312 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:33:22,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:33:22,373 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:33:22,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22 WrapperNode [2020-10-14 08:33:22,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:33:22,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:33:22,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:33:22,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:33:22,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22" (1/1) ... [2020-10-14 08:33:22,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22" (1/1) ... [2020-10-14 08:33:22,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22" (1/1) ... [2020-10-14 08:33:22,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22" (1/1) ... [2020-10-14 08:33:22,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22" (1/1) ... [2020-10-14 08:33:22,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22" (1/1) ... [2020-10-14 08:33:22,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22" (1/1) ... [2020-10-14 08:33:22,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:33:22,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:33:22,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:33:22,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:33:22,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22" (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 [2020-10-14 08:33:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:33:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:33:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:33:22,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:33:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:33:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:33:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:33:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:33:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:33:22,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:33:22,708 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:33:22,708 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:33:22,708 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:33:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:33:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:33:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:33:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 08:33:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:33:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:33:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:33:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:33:22,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:33:26,546 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:33:26,547 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:33:26,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:33:26 BoogieIcfgContainer [2020-10-14 08:33:26,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:33:26,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:33:26,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:33:26,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:33:26,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:33:19" (1/3) ... [2020-10-14 08:33:26,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b2af45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:33:26, skipping insertion in model container [2020-10-14 08:33:26,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:33:22" (2/3) ... [2020-10-14 08:33:26,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b2af45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:33:26, skipping insertion in model container [2020-10-14 08:33:26,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:33:26" (3/3) ... [2020-10-14 08:33:26,567 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-14 08:33:26,577 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:33:26,586 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:33:26,600 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:33:26,629 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:33:26,630 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:33:26,630 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:33:26,630 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:33:26,630 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:33:26,630 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:33:26,630 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:33:26,631 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:33:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states. [2020-10-14 08:33:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-14 08:33:26,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:33:26,707 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] [2020-10-14 08:33:26,708 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:33:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:33:26,714 INFO L82 PathProgramCache]: Analyzing trace with hash 767661517, now seen corresponding path program 1 times [2020-10-14 08:33:26,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:33:26,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264943789] [2020-10-14 08:33:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:33:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:27,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:28,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:28,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:28,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:29,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:29,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:30,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:30,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:31,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:31,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:32,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:32,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:32,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:32,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-14 08:33:32,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:33:32,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-14 08:33:32,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:32,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:33:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-10-14 08:33:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:33:32,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 08:33:34,130 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:33:34,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:33:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:34,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:34,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:34,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:33:34,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:33:34,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-14 08:33:34,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:34,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:34,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:33:34,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:33:34,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:33:34,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:33:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:33:34,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264943789] [2020-10-14 08:33:34,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:33:34,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:33:34,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508528409] [2020-10-14 08:33:34,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:33:34,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:33:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:33:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:33:34,477 INFO L87 Difference]: Start difference. First operand 1419 states. Second operand 4 states. [2020-10-14 08:33:35,349 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-10-14 08:33:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:33:47,197 INFO L93 Difference]: Finished difference Result 2609 states and 4570 transitions. [2020-10-14 08:33:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:33:47,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-10-14 08:33:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:33:47,232 INFO L225 Difference]: With dead ends: 2609 [2020-10-14 08:33:47,233 INFO L226 Difference]: Without dead ends: 1861 [2020-10-14 08:33:47,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:33:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2020-10-14 08:33:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1859. [2020-10-14 08:33:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1859 states. [2020-10-14 08:33:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 3121 transitions. [2020-10-14 08:33:47,408 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 3121 transitions. Word has length 340 [2020-10-14 08:33:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:33:47,409 INFO L479 AbstractCegarLoop]: Abstraction has 1859 states and 3121 transitions. [2020-10-14 08:33:47,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:33:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 3121 transitions. [2020-10-14 08:33:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-14 08:33:47,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:33:47,418 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] [2020-10-14 08:33:47,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:33:47,419 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:33:47,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:33:47,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1506415789, now seen corresponding path program 1 times [2020-10-14 08:33:47,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:33:47,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146131351] [2020-10-14 08:33:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:33:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:48,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:48,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:48,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:49,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:49,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:49,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:49,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:50,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:50,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:51,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:51,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:52,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:52,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:52,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 348 [2020-10-14 08:33:52,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 08:33:52,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 08:33:52,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:52,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:52,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:33:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-10-14 08:33:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 08:33:52,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:33:53,773 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:33:53,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:33:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:53,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:53,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:53,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:33:53,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:33:53,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-14 08:33:53,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:53,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:53,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:33:53,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:33:53,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:33:53,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:33:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:33:54,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146131351] [2020-10-14 08:33:54,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:33:54,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:33:54,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469823863] [2020-10-14 08:33:54,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:33:54,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:33:54,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:33:54,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:33:54,172 INFO L87 Difference]: Start difference. First operand 1859 states and 3121 transitions. Second operand 4 states. [2020-10-14 08:33:55,314 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 387 [2020-10-14 08:34:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:34:09,354 INFO L93 Difference]: Finished difference Result 4229 states and 6981 transitions. [2020-10-14 08:34:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:34:09,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2020-10-14 08:34:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:34:09,374 INFO L225 Difference]: With dead ends: 4229 [2020-10-14 08:34:09,374 INFO L226 Difference]: Without dead ends: 3087 [2020-10-14 08:34:09,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:34:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2020-10-14 08:34:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 2931. [2020-10-14 08:34:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2931 states. [2020-10-14 08:34:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 4858 transitions. [2020-10-14 08:34:09,506 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 4858 transitions. Word has length 342 [2020-10-14 08:34:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:34:09,507 INFO L479 AbstractCegarLoop]: Abstraction has 2931 states and 4858 transitions. [2020-10-14 08:34:09,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:34:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 4858 transitions. [2020-10-14 08:34:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-14 08:34:09,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:34:09,522 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] [2020-10-14 08:34:09,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:34:09,523 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:34:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:34:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash 298595775, now seen corresponding path program 1 times [2020-10-14 08:34:09,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:34:09,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25550901] [2020-10-14 08:34:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:34:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:34:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:10,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:10,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:11,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:12,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:12,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:12,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:13,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:14,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:34:14,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 350 [2020-10-14 08:34:14,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 08:34:14,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 08:34:14,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:34:14,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:34:14,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:34:14,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-14 08:34:14,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 08:34:14,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:34:15,663 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:34:15,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:34:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:34:15,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:15,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:34:15,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:34:15,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:34:15,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-14 08:34:15,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:34:15,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:34:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:34:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:34:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:34:15,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:34:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:34:15,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25550901] [2020-10-14 08:34:15,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:34:15,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:34:15,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001392247] [2020-10-14 08:34:15,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:34:15,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:34:15,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:34:15,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:34:15,889 INFO L87 Difference]: Start difference. First operand 2931 states and 4858 transitions. Second operand 4 states. [2020-10-14 08:34:16,658 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 387 [2020-10-14 08:34:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:34:26,574 INFO L93 Difference]: Finished difference Result 7120 states and 11652 transitions. [2020-10-14 08:34:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:34:26,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-10-14 08:34:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:34:26,599 INFO L225 Difference]: With dead ends: 7120 [2020-10-14 08:34:26,599 INFO L226 Difference]: Without dead ends: 5096 [2020-10-14 08:34:26,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:34:26,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2020-10-14 08:34:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 4786. [2020-10-14 08:34:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4786 states. [2020-10-14 08:34:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 7844 transitions. [2020-10-14 08:34:26,803 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 7844 transitions. Word has length 344 [2020-10-14 08:34:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:34:26,804 INFO L479 AbstractCegarLoop]: Abstraction has 4786 states and 7844 transitions. [2020-10-14 08:34:26,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:34:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 7844 transitions. [2020-10-14 08:34:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-10-14 08:34:26,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:34:26,821 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] [2020-10-14 08:34:26,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:34:26,822 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:34:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:34:26,823 INFO L82 PathProgramCache]: Analyzing trace with hash 832949471, now seen corresponding path program 1 times [2020-10-14 08:34:26,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:34:26,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526322588] [2020-10-14 08:34:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:34:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:34:27,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:27,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:27,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:27,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:28,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:28,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:29,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:29,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:29,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:29,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:30,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:32,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:34:32,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 352 [2020-10-14 08:34:32,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 08:34:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-14 08:34:32,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:34:32,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:34:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:34:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-10-14 08:34:32,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 08:34:32,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:34:32,811 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:34:32,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:34:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:34:32,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:32,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:34:32,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:34:32,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:34:32,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-14 08:34:32,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:34:32,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:34:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:34:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:34:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:34:32,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:34:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:34:33,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526322588] [2020-10-14 08:34:33,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:34:33,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:34:33,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110098695] [2020-10-14 08:34:33,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:34:33,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:34:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:34:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:34:33,051 INFO L87 Difference]: Start difference. First operand 4786 states and 7844 transitions. Second operand 4 states. [2020-10-14 08:34:33,795 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 387 [2020-10-14 08:34:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:34:43,528 INFO L93 Difference]: Finished difference Result 12066 states and 19582 transitions. [2020-10-14 08:34:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:34:43,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 346 [2020-10-14 08:34:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:34:43,568 INFO L225 Difference]: With dead ends: 12066 [2020-10-14 08:34:43,569 INFO L226 Difference]: Without dead ends: 8536 [2020-10-14 08:34:43,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:34:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8536 states. [2020-10-14 08:34:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8536 to 7918. [2020-10-14 08:34:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7918 states. [2020-10-14 08:34:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7918 states to 7918 states and 12840 transitions. [2020-10-14 08:34:44,068 INFO L78 Accepts]: Start accepts. Automaton has 7918 states and 12840 transitions. Word has length 346 [2020-10-14 08:34:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:34:44,069 INFO L479 AbstractCegarLoop]: Abstraction has 7918 states and 12840 transitions. [2020-10-14 08:34:44,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:34:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 7918 states and 12840 transitions. [2020-10-14 08:34:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-10-14 08:34:44,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:34:44,087 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] [2020-10-14 08:34:44,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:34:44,088 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:34:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:34:44,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1928551569, now seen corresponding path program 1 times [2020-10-14 08:34:44,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:34:44,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188698554] [2020-10-14 08:34:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:34:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:34:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:44,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:44,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:45,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:45,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:45,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:45,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:46,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:46,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:46,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:47,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:49,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:34:49,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 354 [2020-10-14 08:34:49,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:34:49,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 08:34:49,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:34:49,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:34:49,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:34:49,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-10-14 08:34:49,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 08:34:49,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:34:50,058 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:34:50,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:34:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:34:50,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:50,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:34:50,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:34:50,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:34:50,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:34:50,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:34:50,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:34:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:34:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:34:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:34:50,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:34:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:34:50,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188698554] [2020-10-14 08:34:50,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:34:50,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:34:50,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363463165] [2020-10-14 08:34:50,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:34:50,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:34:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:34:50,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:34:50,197 INFO L87 Difference]: Start difference. First operand 7918 states and 12840 transitions. Second operand 4 states. [2020-10-14 08:34:50,946 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 387 [2020-10-14 08:35:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:35:02,384 INFO L93 Difference]: Finished difference Result 20286 states and 32618 transitions. [2020-10-14 08:35:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:35:02,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 348 [2020-10-14 08:35:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:35:02,433 INFO L225 Difference]: With dead ends: 20286 [2020-10-14 08:35:02,434 INFO L226 Difference]: Without dead ends: 14260 [2020-10-14 08:35:02,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:35:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14260 states. [2020-10-14 08:35:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14260 to 13026. [2020-10-14 08:35:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13026 states. [2020-10-14 08:35:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13026 states to 13026 states and 20880 transitions. [2020-10-14 08:35:03,003 INFO L78 Accepts]: Start accepts. Automaton has 13026 states and 20880 transitions. Word has length 348 [2020-10-14 08:35:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:35:03,004 INFO L479 AbstractCegarLoop]: Abstraction has 13026 states and 20880 transitions. [2020-10-14 08:35:03,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:35:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 13026 states and 20880 transitions. [2020-10-14 08:35:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-14 08:35:03,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:35:03,032 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] [2020-10-14 08:35:03,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:35:03,032 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:35:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:35:03,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1621186694, now seen corresponding path program 1 times [2020-10-14 08:35:03,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:35:03,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179166373] [2020-10-14 08:35:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:35:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:35:03,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:03,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:03,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:03,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:04,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:04,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:04,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:04,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:04,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:04,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:05,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:05,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:08,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:35:08,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-14 08:35:08,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 08:35:08,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 08:35:08,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:35:08,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:35:08,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:35:08,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-10-14 08:35:08,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 08:35:08,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:35:08,913 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:35:08,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:35:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:35:08,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:08,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:35:08,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:35:08,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:35:08,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:35:08,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:35:08,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:35:08,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:35:08,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:35:08,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:35:08,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:35:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:35:09,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179166373] [2020-10-14 08:35:09,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:35:09,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:35:09,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730256972] [2020-10-14 08:35:09,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:35:09,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:35:09,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:35:09,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:35:09,144 INFO L87 Difference]: Start difference. First operand 13026 states and 20880 transitions. Second operand 4 states. [2020-10-14 08:35:09,886 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-10-14 08:35:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:35:20,012 INFO L93 Difference]: Finished difference Result 22254 states and 35786 transitions. [2020-10-14 08:35:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:35:20,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 350 [2020-10-14 08:35:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:35:20,037 INFO L225 Difference]: With dead ends: 22254 [2020-10-14 08:35:20,038 INFO L226 Difference]: Without dead ends: 12248 [2020-10-14 08:35:20,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:35:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12248 states. [2020-10-14 08:35:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12248 to 12246. [2020-10-14 08:35:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12246 states. [2020-10-14 08:35:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12246 states to 12246 states and 19680 transitions. [2020-10-14 08:35:20,534 INFO L78 Accepts]: Start accepts. Automaton has 12246 states and 19680 transitions. Word has length 350 [2020-10-14 08:35:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:35:20,535 INFO L479 AbstractCegarLoop]: Abstraction has 12246 states and 19680 transitions. [2020-10-14 08:35:20,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:35:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 12246 states and 19680 transitions. [2020-10-14 08:35:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-14 08:35:20,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:35:20,558 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] [2020-10-14 08:35:20,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:35:20,559 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:35:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:35:20,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2138048129, now seen corresponding path program 1 times [2020-10-14 08:35:20,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:35:20,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915267599] [2020-10-14 08:35:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:35:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:35:20,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:20,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:21,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:21,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:21,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:21,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:22,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:22,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:22,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:22,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:25,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:35:25,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-14 08:35:25,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 08:35:25,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 08:35:25,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:35:25,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:35:25,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:35:25,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-10-14 08:35:25,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 08:35:25,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:35:26,386 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:35:26,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:35:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:35:26,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:26,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:35:26,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:35:26,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:35:26,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:35:26,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:35:26,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:35:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:35:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:35:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:35:26,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:35:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:35:26,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915267599] [2020-10-14 08:35:26,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:35:26,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:35:26,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763574648] [2020-10-14 08:35:26,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:35:26,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:35:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:35:26,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:35:26,485 INFO L87 Difference]: Start difference. First operand 12246 states and 19680 transitions. Second operand 4 states. [2020-10-14 08:35:27,230 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-10-14 08:35:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:35:37,935 INFO L93 Difference]: Finished difference Result 22438 states and 36174 transitions. [2020-10-14 08:35:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:35:37,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 350 [2020-10-14 08:35:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:35:37,959 INFO L225 Difference]: With dead ends: 22438 [2020-10-14 08:35:37,959 INFO L226 Difference]: Without dead ends: 11895 [2020-10-14 08:35:37,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:35:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11895 states. [2020-10-14 08:35:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11895 to 11893. [2020-10-14 08:35:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11893 states. [2020-10-14 08:35:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11893 states to 11893 states and 19159 transitions. [2020-10-14 08:35:38,533 INFO L78 Accepts]: Start accepts. Automaton has 11893 states and 19159 transitions. Word has length 350 [2020-10-14 08:35:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:35:38,533 INFO L479 AbstractCegarLoop]: Abstraction has 11893 states and 19159 transitions. [2020-10-14 08:35:38,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:35:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 11893 states and 19159 transitions. [2020-10-14 08:35:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-14 08:35:38,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:35:38,551 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] [2020-10-14 08:35:38,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:35:38,552 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:35:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:35:38,552 INFO L82 PathProgramCache]: Analyzing trace with hash 710019053, now seen corresponding path program 1 times [2020-10-14 08:35:38,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:35:38,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638574624] [2020-10-14 08:35:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:35:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:35:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:39,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:39,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:39,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:39,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:39,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:40,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:40,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:40,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:40,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:40,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:40,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:43,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:35:43,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-14 08:35:43,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 08:35:43,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 08:35:43,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:35:43,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:35:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:35:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 210 [2020-10-14 08:35:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-14 08:35:43,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:35:44,458 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:35:44,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:35:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:35:44,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:44,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:35:44,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:35:44,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:35:44,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-14 08:35:44,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:35:44,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:35:44,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:35:44,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:35:44,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:35:44,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:35:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:35:44,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638574624] [2020-10-14 08:35:44,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:35:44,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:35:44,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834601071] [2020-10-14 08:35:44,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:35:44,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:35:44,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:35:44,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:35:44,752 INFO L87 Difference]: Start difference. First operand 11893 states and 19159 transitions. Second operand 4 states. [2020-10-14 08:35:45,482 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-14 08:35:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:35:54,584 INFO L93 Difference]: Finished difference Result 20074 states and 32849 transitions. [2020-10-14 08:35:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:35:54,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 350 [2020-10-14 08:35:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:35:54,609 INFO L225 Difference]: With dead ends: 20074 [2020-10-14 08:35:54,610 INFO L226 Difference]: Without dead ends: 16664 [2020-10-14 08:35:54,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:35:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16664 states. [2020-10-14 08:35:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16664 to 16662. [2020-10-14 08:35:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16662 states. [2020-10-14 08:35:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16662 states to 16662 states and 27007 transitions. [2020-10-14 08:35:55,509 INFO L78 Accepts]: Start accepts. Automaton has 16662 states and 27007 transitions. Word has length 350 [2020-10-14 08:35:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:35:55,510 INFO L479 AbstractCegarLoop]: Abstraction has 16662 states and 27007 transitions. [2020-10-14 08:35:55,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:35:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 16662 states and 27007 transitions. [2020-10-14 08:35:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-14 08:35:55,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:35:55,525 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] [2020-10-14 08:35:55,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:35:55,525 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:35:55,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:35:55,526 INFO L82 PathProgramCache]: Analyzing trace with hash -200800081, now seen corresponding path program 1 times [2020-10-14 08:35:55,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:35:55,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492773537] [2020-10-14 08:35:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:35:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:35:55,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:55,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:56,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:56,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:56,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:56,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:56,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:56,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:57,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:57,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:35:57,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:00,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:00,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-14 08:36:00,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:36:00,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 08:36:00,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:00,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:36:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 211 [2020-10-14 08:36:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-14 08:36:00,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:36:01,463 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:36:01,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:01,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:01,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:01,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:01,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:01,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:36:01,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:01,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:01,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:01,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:01,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:01,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:01,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492773537] [2020-10-14 08:36:01,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:01,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:36:01,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327871500] [2020-10-14 08:36:01,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:36:01,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:01,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:36:01,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:36:01,714 INFO L87 Difference]: Start difference. First operand 16662 states and 27007 transitions. Second operand 4 states. [2020-10-14 08:36:02,422 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-14 08:36:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:12,265 INFO L93 Difference]: Finished difference Result 30843 states and 50633 transitions. [2020-10-14 08:36:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:36:12,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 351 [2020-10-14 08:36:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:12,295 INFO L225 Difference]: With dead ends: 30843 [2020-10-14 08:36:12,295 INFO L226 Difference]: Without dead ends: 24441 [2020-10-14 08:36:12,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:36:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24441 states. [2020-10-14 08:36:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24441 to 24407. [2020-10-14 08:36:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24407 states. [2020-10-14 08:36:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 39783 transitions. [2020-10-14 08:36:13,249 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 39783 transitions. Word has length 351 [2020-10-14 08:36:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:13,249 INFO L479 AbstractCegarLoop]: Abstraction has 24407 states and 39783 transitions. [2020-10-14 08:36:13,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:36:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 39783 transitions. [2020-10-14 08:36:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-14 08:36:13,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:13,269 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] [2020-10-14 08:36:13,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:36:13,269 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1343411416, now seen corresponding path program 1 times [2020-10-14 08:36:13,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:13,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301069943] [2020-10-14 08:36:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:13,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:13,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:13,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:14,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:14,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:14,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:14,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:14,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:14,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:14,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:14,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:14,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:18,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:18,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-14 08:36:18,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 08:36:18,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 08:36:18,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:18,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:36:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:36:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-10-14 08:36:18,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:36:19,320 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:36:19,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:19,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:19,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:19,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:19,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:19,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:36:19,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:19,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:19,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:19,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:36:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:19,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301069943] [2020-10-14 08:36:19,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:19,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:36:19,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514905334] [2020-10-14 08:36:19,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:36:19,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:19,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:36:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:36:19,520 INFO L87 Difference]: Start difference. First operand 24407 states and 39783 transitions. Second operand 5 states. [2020-10-14 08:36:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:36,700 INFO L93 Difference]: Finished difference Result 72659 states and 118440 transitions. [2020-10-14 08:36:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:36:36,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 351 [2020-10-14 08:36:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:36,780 INFO L225 Difference]: With dead ends: 72659 [2020-10-14 08:36:36,780 INFO L226 Difference]: Without dead ends: 48267 [2020-10-14 08:36:36,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:36:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48267 states. [2020-10-14 08:36:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48267 to 48265. [2020-10-14 08:36:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48265 states. [2020-10-14 08:36:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48265 states to 48265 states and 78440 transitions. [2020-10-14 08:36:40,449 INFO L78 Accepts]: Start accepts. Automaton has 48265 states and 78440 transitions. Word has length 351 [2020-10-14 08:36:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:40,450 INFO L479 AbstractCegarLoop]: Abstraction has 48265 states and 78440 transitions. [2020-10-14 08:36:40,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:36:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 48265 states and 78440 transitions. [2020-10-14 08:36:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-14 08:36:40,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:40,477 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] [2020-10-14 08:36:40,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:36:40,477 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:40,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1181247437, now seen corresponding path program 1 times [2020-10-14 08:36:40,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:40,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124503854] [2020-10-14 08:36:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:40,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:40,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:44,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:45,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:45,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:45,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:45,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:45,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-14 08:36:45,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 08:36:45,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 08:36:45,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:45,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:36:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:36:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-14 08:36:45,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:36:46,337 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-14 08:36:46,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:46,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:46,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:46,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:46,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:46,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:36:46,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:46,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:46,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:46,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:46,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:46,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:36:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:46,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124503854] [2020-10-14 08:36:46,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:46,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:36:46,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488069648] [2020-10-14 08:36:46,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:36:46,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:46,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:36:46,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:36:46,506 INFO L87 Difference]: Start difference. First operand 48265 states and 78440 transitions. Second operand 4 states.