/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:28:13,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:28:13,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:28:13,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:28:13,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:28:13,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:28:13,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:28:13,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:28:13,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:28:13,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:28:13,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:28:13,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:28:13,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:28:13,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:28:13,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:28:13,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:28:13,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:28:13,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:28:13,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:28:13,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:28:13,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:28:13,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:28:13,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:28:13,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:28:13,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:28:13,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:28:13,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:28:13,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:28:13,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:28:13,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:28:13,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:28:13,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:28:13,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:28:13,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:28:13,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:28:13,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:28:13,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:28:13,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:28:13,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:28:13,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:28:13,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:28:13,778 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 [2020-10-28 19:28:13,829 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:28:13,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:28:13,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:28:13,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:28:13,831 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:28:13,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:28:13,832 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:28:13,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:28:13,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:28:13,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:28:13,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:28:13,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:28:13,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:28:13,833 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:28:13,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:28:13,834 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:28:13,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:28:13,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:28:13,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:28:13,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:28:13,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:28:13,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:28:13,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:28:13,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:28:13,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:28:13,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:28:13,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:28:13,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:28:13,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:28:13,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:28:14,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:28:14,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:28:14,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:28:14,238 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:28:14,239 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:28:14,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 19:28:14,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/958a35bf2/ca51b2f3d6564cd6abf786aba7cb9935/FLAG09e68c85a [2020-10-28 19:28:15,178 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:28:15,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 19:28:15,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/958a35bf2/ca51b2f3d6564cd6abf786aba7cb9935/FLAG09e68c85a [2020-10-28 19:28:15,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/958a35bf2/ca51b2f3d6564cd6abf786aba7cb9935 [2020-10-28 19:28:15,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:28:15,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:28:15,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:28:15,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:28:15,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:28:15,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:28:15" (1/1) ... [2020-10-28 19:28:15,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35dca622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:15, skipping insertion in model container [2020-10-28 19:28:15,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:28:15" (1/1) ... [2020-10-28 19:28:15,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:28:15,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:28:16,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:28:17,013 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:28:17,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:28:17,733 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:28:17,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17 WrapperNode [2020-10-28 19:28:17,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:28:17,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:28:17,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:28:17,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:28:17,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17" (1/1) ... [2020-10-28 19:28:17,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17" (1/1) ... [2020-10-28 19:28:17,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17" (1/1) ... [2020-10-28 19:28:17,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17" (1/1) ... [2020-10-28 19:28:17,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17" (1/1) ... [2020-10-28 19:28:17,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17" (1/1) ... [2020-10-28 19:28:18,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17" (1/1) ... [2020-10-28 19:28:18,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:28:18,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:28:18,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:28:18,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:28:18,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17" (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 [2020-10-28 19:28:18,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:28:18,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:28:18,156 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:28:18,157 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:28:18,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:28:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:28:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:28:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:28:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:28:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:28:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:28:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:28:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:28:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:28:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:28:18,161 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:28:18,161 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:28:18,162 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:28:18,162 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:28:18,162 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:28:18,162 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:28:18,162 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:28:18,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:28:18,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:28:18,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:28:18,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:28:18,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:28:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:28:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:28:22,566 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:28:22,566 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:28:22,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:28:22 BoogieIcfgContainer [2020-10-28 19:28:22,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:28:22,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:28:22,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:28:22,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:28:22,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:28:15" (1/3) ... [2020-10-28 19:28:22,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4f84d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:28:22, skipping insertion in model container [2020-10-28 19:28:22,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:28:17" (2/3) ... [2020-10-28 19:28:22,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4f84d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:28:22, skipping insertion in model container [2020-10-28 19:28:22,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:28:22" (3/3) ... [2020-10-28 19:28:22,580 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 19:28:22,592 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:28:22,598 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:28:22,612 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:28:22,648 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:28:22,648 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:28:22,648 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:28:22,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:28:22,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:28:22,649 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:28:22,649 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:28:22,649 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:28:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states. [2020-10-28 19:28:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-28 19:28:22,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:22,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:28:22,790 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:22,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1115878415, now seen corresponding path program 1 times [2020-10-28 19:28:22,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:22,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817563269] [2020-10-28 19:28:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:23,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:23,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:24,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:25,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:25,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:26,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:26,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:27,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:28,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:28,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:28,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 400 [2020-10-28 19:28:28,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:28:28,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5140 [2020-10-28 19:28:28,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:28,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:28:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:28:28,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 245 [2020-10-28 19:28:28,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:28:30,580 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 19:28:30,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:30,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:30,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:30,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:30,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:30,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 19:28:30,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:30,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:30,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:30,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:30,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:30,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:28:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:28:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817563269] [2020-10-28 19:28:31,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:31,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:28:31,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140355765] [2020-10-28 19:28:31,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:28:31,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:31,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:28:31,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:28:31,141 INFO L87 Difference]: Start difference. First operand 1553 states. Second operand 5 states. [2020-10-28 19:28:46,448 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 19:28:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:48,191 INFO L93 Difference]: Finished difference Result 4526 states and 8035 transitions. [2020-10-28 19:28:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:28:48,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 392 [2020-10-28 19:28:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:48,233 INFO L225 Difference]: With dead ends: 4526 [2020-10-28 19:28:48,233 INFO L226 Difference]: Without dead ends: 3046 [2020-10-28 19:28:48,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:28:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2020-10-28 19:28:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 3043. [2020-10-28 19:28:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3043 states. [2020-10-28 19:28:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 5111 transitions. [2020-10-28 19:28:48,525 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 5111 transitions. Word has length 392 [2020-10-28 19:28:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:48,530 INFO L481 AbstractCegarLoop]: Abstraction has 3043 states and 5111 transitions. [2020-10-28 19:28:48,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:28:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 5111 transitions. [2020-10-28 19:28:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-28 19:28:48,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:48,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:28:48,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:28:48,549 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:48,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1457410911, now seen corresponding path program 1 times [2020-10-28 19:28:48,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:48,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204874216] [2020-10-28 19:28:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:48,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:49,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:49,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:50,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:50,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:51,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:51,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:52,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:52,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:53,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:53,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 400 [2020-10-28 19:28:53,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:28:53,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-28 19:28:53,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:53,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:28:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:28:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-28 19:28:53,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:28:55,445 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 19:28:55,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:55,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:55,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:55,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:55,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:55,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 19:28:55,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:55,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:55,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:55,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:55,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:55,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:28:55,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204874216] [2020-10-28 19:28:55,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:55,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:28:55,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202903577] [2020-10-28 19:28:55,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:28:55,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:55,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:28:55,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:28:55,829 INFO L87 Difference]: Start difference. First operand 3043 states and 5111 transitions. Second operand 5 states. [2020-10-28 19:29:09,433 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 19:29:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:29:11,203 INFO L93 Difference]: Finished difference Result 8953 states and 15026 transitions. [2020-10-28 19:29:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:29:11,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 392 [2020-10-28 19:29:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:29:11,241 INFO L225 Difference]: With dead ends: 8953 [2020-10-28 19:29:11,241 INFO L226 Difference]: Without dead ends: 6008 [2020-10-28 19:29:11,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:29:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2020-10-28 19:29:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 6005. [2020-10-28 19:29:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6005 states. [2020-10-28 19:29:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 10053 transitions. [2020-10-28 19:29:11,635 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 10053 transitions. Word has length 392 [2020-10-28 19:29:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:29:11,636 INFO L481 AbstractCegarLoop]: Abstraction has 6005 states and 10053 transitions. [2020-10-28 19:29:11,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:29:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 10053 transitions. [2020-10-28 19:29:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-28 19:29:11,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:29:11,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:29:11,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:29:11,659 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:29:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:29:11,660 INFO L82 PathProgramCache]: Analyzing trace with hash -987884814, now seen corresponding path program 1 times [2020-10-28 19:29:11,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:29:11,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696836568] [2020-10-28 19:29:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:29:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:11,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:12,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:12,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:12,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:13,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:13,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:13,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:14,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:14,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:15,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:15,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:16,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:16,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 400 [2020-10-28 19:29:16,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:29:16,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:29:16,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:16,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:16,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:29:16,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:29:16,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 19:29:16,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:18,339 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 19:29:18,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:29:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:18,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:18,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:18,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:29:18,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:29:18,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:29:18,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:18,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:18,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:29:18,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:29:18,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:29:18,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:29:18,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696836568] [2020-10-28 19:29:18,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:29:18,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:29:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180814803] [2020-10-28 19:29:18,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:29:18,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:29:18,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:29:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:29:18,607 INFO L87 Difference]: Start difference. First operand 6005 states and 10053 transitions. Second operand 5 states. [2020-10-28 19:29:31,812 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 19:29:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:29:33,418 INFO L93 Difference]: Finished difference Result 17628 states and 29467 transitions. [2020-10-28 19:29:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:29:33,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 392 [2020-10-28 19:29:33,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:29:33,473 INFO L225 Difference]: With dead ends: 17628 [2020-10-28 19:29:33,473 INFO L226 Difference]: Without dead ends: 11761 [2020-10-28 19:29:33,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:29:33,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11761 states. [2020-10-28 19:29:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11761 to 11758. [2020-10-28 19:29:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11758 states. [2020-10-28 19:29:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11758 states to 11758 states and 19579 transitions. [2020-10-28 19:29:34,414 INFO L78 Accepts]: Start accepts. Automaton has 11758 states and 19579 transitions. Word has length 392 [2020-10-28 19:29:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:29:34,414 INFO L481 AbstractCegarLoop]: Abstraction has 11758 states and 19579 transitions. [2020-10-28 19:29:34,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:29:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 11758 states and 19579 transitions. [2020-10-28 19:29:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-10-28 19:29:34,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:29:34,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:29:34,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:29:34,452 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:29:34,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:29:34,452 INFO L82 PathProgramCache]: Analyzing trace with hash -176629098, now seen corresponding path program 1 times [2020-10-28 19:29:34,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:29:34,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748869871] [2020-10-28 19:29:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:29:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:34,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:34,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:34,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:35,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:35,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:35,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:36,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:36,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:37,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:37,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:39,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:39,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-28 19:29:39,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:29:39,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-28 19:29:39,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:39,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:29:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:29:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 203 [2020-10-28 19:29:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:41,213 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 19:29:41,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:29:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:41,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:41,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:41,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:29:41,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:29:41,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:29:41,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:41,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:41,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:29:41,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:29:41,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:29:41,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:29:41,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748869871] [2020-10-28 19:29:41,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:29:41,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:29:41,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306672363] [2020-10-28 19:29:41,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:29:41,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:29:41,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:29:41,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:29:41,465 INFO L87 Difference]: Start difference. First operand 11758 states and 19579 transitions. Second operand 5 states. [2020-10-28 19:29:56,135 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 19:29:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:29:57,775 INFO L93 Difference]: Finished difference Result 34525 states and 57403 transitions. [2020-10-28 19:29:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:29:57,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 394 [2020-10-28 19:29:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:29:57,841 INFO L225 Difference]: With dead ends: 34525 [2020-10-28 19:29:57,841 INFO L226 Difference]: Without dead ends: 23218 [2020-10-28 19:29:57,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:29:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23218 states. [2020-10-28 19:29:59,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23218 to 23215. [2020-10-28 19:29:59,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23215 states. [2020-10-28 19:29:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23215 states to 23215 states and 38471 transitions. [2020-10-28 19:29:59,289 INFO L78 Accepts]: Start accepts. Automaton has 23215 states and 38471 transitions. Word has length 394 [2020-10-28 19:29:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:29:59,290 INFO L481 AbstractCegarLoop]: Abstraction has 23215 states and 38471 transitions. [2020-10-28 19:29:59,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:29:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 23215 states and 38471 transitions. [2020-10-28 19:29:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-10-28 19:29:59,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:29:59,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:29:59,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:29:59,352 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:29:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:29:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash 815087782, now seen corresponding path program 1 times [2020-10-28 19:29:59,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:29:59,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80078121] [2020-10-28 19:29:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:29:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:59,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:59,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:59,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:00,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:00,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:00,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:00,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:01,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:01,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:02,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:02,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:02,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:04,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:30:04,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-28 19:30:04,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:30:04,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:30:04,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:30:04,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:30:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:30:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:30:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-28 19:30:04,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:30:05,888 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 19:30:05,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:30:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:30:05,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:05,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:30:05,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:30:05,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:30:05,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:30:05,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:30:05,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:30:05,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:30:05,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:30:05,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:30:05,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:30:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:30:06,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80078121] [2020-10-28 19:30:06,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:30:06,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:30:06,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716731079] [2020-10-28 19:30:06,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:30:06,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:30:06,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:30:06,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:30:06,213 INFO L87 Difference]: Start difference. First operand 23215 states and 38471 transitions. Second operand 5 states. [2020-10-28 19:30:23,267 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 19:30:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:30:26,080 INFO L93 Difference]: Finished difference Result 68598 states and 113583 transitions. [2020-10-28 19:30:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:30:26,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 394 [2020-10-28 19:30:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:30:26,214 INFO L225 Difference]: With dead ends: 68598 [2020-10-28 19:30:26,214 INFO L226 Difference]: Without dead ends: 45445 [2020-10-28 19:30:26,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:30:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45445 states. [2020-10-28 19:30:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45445 to 45442. [2020-10-28 19:30:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45442 states. [2020-10-28 19:30:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45442 states to 45442 states and 74907 transitions. [2020-10-28 19:30:28,838 INFO L78 Accepts]: Start accepts. Automaton has 45442 states and 74907 transitions. Word has length 394 [2020-10-28 19:30:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:30:28,839 INFO L481 AbstractCegarLoop]: Abstraction has 45442 states and 74907 transitions. [2020-10-28 19:30:28,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:30:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 45442 states and 74907 transitions. [2020-10-28 19:30:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-28 19:30:28,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:30:28,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:30:28,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:30:28,915 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:30:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:30:28,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1885933773, now seen corresponding path program 1 times [2020-10-28 19:30:28,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:30:28,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769371795] [2020-10-28 19:30:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:30:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:30:29,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:29,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:29,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:29,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:29,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:29,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:30,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:30,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:30,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:31,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:31,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:31,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:31,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:34,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:30:34,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 404 [2020-10-28 19:30:34,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:30:34,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 19:30:34,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:30:34,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:30:34,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:30:34,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:30:34,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-28 19:30:34,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:30:35,431 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 19:30:35,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:30:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:30:35,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:35,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:30:35,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:30:35,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:30:35,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:30:35,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:30:35,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:30:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:30:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:30:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:30:35,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:30:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:30:35,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769371795] [2020-10-28 19:30:35,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:30:35,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:30:35,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837949326] [2020-10-28 19:30:35,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:30:35,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:30:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:30:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:30:35,670 INFO L87 Difference]: Start difference. First operand 45442 states and 74907 transitions. Second operand 5 states. [2020-10-28 19:30:52,653 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 19:30:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:30:54,974 INFO L93 Difference]: Finished difference Result 134624 states and 221797 transitions. [2020-10-28 19:30:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:30:54,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 396 [2020-10-28 19:30:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:30:55,157 INFO L225 Difference]: With dead ends: 134624 [2020-10-28 19:30:55,157 INFO L226 Difference]: Without dead ends: 89547 [2020-10-28 19:30:55,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:30:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89547 states. [2020-10-28 19:31:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89547 to 89544. [2020-10-28 19:31:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89544 states. [2020-10-28 19:31:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89544 states to 89544 states and 146885 transitions. [2020-10-28 19:31:00,649 INFO L78 Accepts]: Start accepts. Automaton has 89544 states and 146885 transitions. Word has length 396 [2020-10-28 19:31:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:31:00,650 INFO L481 AbstractCegarLoop]: Abstraction has 89544 states and 146885 transitions. [2020-10-28 19:31:00,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:31:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 89544 states and 146885 transitions. [2020-10-28 19:31:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 19:31:00,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:31:00,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:31:00,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:31:00,935 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:31:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:31:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1535807700, now seen corresponding path program 1 times [2020-10-28 19:31:00,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:31:00,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243014115] [2020-10-28 19:31:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:31:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:31:01,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:01,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:01,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:01,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:01,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:01,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:01,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:01,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:02,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:02,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:02,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:06,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:31:06,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 19:31:06,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:31:06,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 19:31:06,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:31:06,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:31:06,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:31:06,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:31:06,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-28 19:31:06,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:31:07,495 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 19:31:07,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:31:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:31:07,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:31:07,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:31:07,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:31:07,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:31:07,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:31:07,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:31:07,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:31:07,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:31:07,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:31:07,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:31:07,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:31:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:31:07,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243014115] [2020-10-28 19:31:07,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:31:07,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:31:07,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722656099] [2020-10-28 19:31:07,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:31:07,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:31:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:31:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:31:07,822 INFO L87 Difference]: Start difference. First operand 89544 states and 146885 transitions. Second operand 5 states. [2020-10-28 19:31:36,566 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 19:31:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:31:41,314 INFO L93 Difference]: Finished difference Result 260789 states and 427108 transitions. [2020-10-28 19:31:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:31:41,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 397 [2020-10-28 19:31:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:31:41,636 INFO L225 Difference]: With dead ends: 260789 [2020-10-28 19:31:41,637 INFO L226 Difference]: Without dead ends: 175378 [2020-10-28 19:31:41,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:31:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175378 states. [2020-10-28 19:31:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175378 to 175375. [2020-10-28 19:31:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175375 states.