/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=DEEPEST --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_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:57:15,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:57:15,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:57:16,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:57:16,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:57:16,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:57:16,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:57:16,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:57:16,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:57:16,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:57:16,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:57:16,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:57:16,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:57:16,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:57:16,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:57:16,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:57:16,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:57:16,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:57:16,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:57:16,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:57:16,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:57:16,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:57:16,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:57:16,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:57:16,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:57:16,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:57:16,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:57:16,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:57:16,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:57:16,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:57:16,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:57:16,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:57:16,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:57:16,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:57:16,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:57:16,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:57:16,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:57:16,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:57:16,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:57:16,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:57:16,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:57:16,129 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 [2020-10-27 23:57:16,182 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:57:16,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:57:16,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:57:16,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:57:16,187 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:57:16,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:57:16,188 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:57:16,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:57:16,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:57:16,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:57:16,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:57:16,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:57:16,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:57:16,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:57:16,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:57:16,190 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:57:16,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:57:16,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:57:16,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:57:16,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:57:16,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:57:16,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:57:16,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:57:16,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:57:16,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:57:16,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:57:16,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:57:16,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:57:16,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:57:16,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:57:16,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:57:16,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:57:16,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:57:16,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:57:16,640 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:57:16,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-27 23:57:16,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd9b23303/a7112880e8d64b5aa716310f60075db7/FLAGa60d27c93 [2020-10-27 23:57:17,534 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:57:17,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-27 23:57:17,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd9b23303/a7112880e8d64b5aa716310f60075db7/FLAGa60d27c93 [2020-10-27 23:57:17,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd9b23303/a7112880e8d64b5aa716310f60075db7 [2020-10-27 23:57:17,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:57:17,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:57:17,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:57:17,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:57:17,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:57:17,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:57:17" (1/1) ... [2020-10-27 23:57:17,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b942c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:17, skipping insertion in model container [2020-10-27 23:57:17,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:57:17" (1/1) ... [2020-10-27 23:57:17,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:57:17,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:57:18,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:57:18,348 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:57:18,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:57:18,499 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:57:18,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18 WrapperNode [2020-10-27 23:57:18,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:57:18,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:57:18,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:57:18,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:57:18,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18" (1/1) ... [2020-10-27 23:57:18,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18" (1/1) ... [2020-10-27 23:57:18,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18" (1/1) ... [2020-10-27 23:57:18,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18" (1/1) ... [2020-10-27 23:57:18,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18" (1/1) ... [2020-10-27 23:57:18,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18" (1/1) ... [2020-10-27 23:57:18,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18" (1/1) ... [2020-10-27 23:57:18,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:57:18,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:57:18,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:57:18,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:57:18,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18" (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 [2020-10-27 23:57:18,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:57:18,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:57:18,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:57:18,677 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:57:18,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:57:18,678 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:57:18,679 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:57:18,679 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:57:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:57:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:57:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:57:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:57:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:57:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:57:18,682 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:57:18,683 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:57:18,683 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:57:18,683 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:57:18,683 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:57:18,683 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:57:18,684 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 23:57:18,684 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-27 23:57:18,684 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:57:18,684 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:57:18,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:57:18,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:57:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:57:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:57:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:57:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:57:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:57:19,682 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:57:19,682 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:57:19,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:57:19 BoogieIcfgContainer [2020-10-27 23:57:19,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:57:19,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:57:19,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:57:19,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:57:19,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:57:17" (1/3) ... [2020-10-27 23:57:19,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c49c1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:57:19, skipping insertion in model container [2020-10-27 23:57:19,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:57:18" (2/3) ... [2020-10-27 23:57:19,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c49c1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:57:19, skipping insertion in model container [2020-10-27 23:57:19,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:57:19" (3/3) ... [2020-10-27 23:57:19,695 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-27 23:57:19,708 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:57:19,714 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:57:19,728 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:57:19,757 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:57:19,757 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:57:19,758 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:57:19,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:57:19,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:57:19,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:57:19,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:57:19,758 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:57:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-27 23:57:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 23:57:19,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:19,795 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] [2020-10-27 23:57:19,796 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:19,803 INFO L82 PathProgramCache]: Analyzing trace with hash 247434898, now seen corresponding path program 1 times [2020-10-27 23:57:19,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:19,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299309193] [2020-10-27 23:57:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:20,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:20,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:20,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:20,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:21,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:22,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:25,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:25,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 23:57:25,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:57:25,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:57:25,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:57:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 23:57:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:57:25,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:57:25,878 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:57:25,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:25,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:25,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:25,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:25,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:25,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 23:57:25,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:25,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:25,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:25,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:25,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:57:25,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299309193] [2020-10-27 23:57:25,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:25,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:57:25,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615073643] [2020-10-27 23:57:25,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:57:25,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:26,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:57:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:57:26,010 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 4 states. [2020-10-27 23:57:26,404 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:57:27,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:27,335 INFO L93 Difference]: Finished difference Result 307 states and 499 transitions. [2020-10-27 23:57:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:57:27,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-27 23:57:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:27,351 INFO L225 Difference]: With dead ends: 307 [2020-10-27 23:57:27,351 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 23:57:27,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:57:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 23:57:27,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-27 23:57:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 23:57:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 297 transitions. [2020-10-27 23:57:27,480 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 297 transitions. Word has length 91 [2020-10-27 23:57:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:27,482 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 297 transitions. [2020-10-27 23:57:27,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:57:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 297 transitions. [2020-10-27 23:57:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 23:57:27,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:27,492 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] [2020-10-27 23:57:27,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:57:27,493 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:27,495 INFO L82 PathProgramCache]: Analyzing trace with hash 888957062, now seen corresponding path program 1 times [2020-10-27 23:57:27,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:27,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316213126] [2020-10-27 23:57:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:27,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:27,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:27,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:27,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:27,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:28,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:28,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:32,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:32,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 23:57:32,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:57:32,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:57:32,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:32,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:57:32,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 23:57:32,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:57:32,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:32,993 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:57:32,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:33,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:33,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:33,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:33,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:33,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:57:33,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:33,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:33,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:33,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:33,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:57:33,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316213126] [2020-10-27 23:57:33,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:33,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:57:33,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254114804] [2020-10-27 23:57:33,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:57:33,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:33,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:57:33,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:57:33,060 INFO L87 Difference]: Start difference. First operand 208 states and 297 transitions. Second operand 4 states. [2020-10-27 23:57:33,490 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:57:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:34,329 INFO L93 Difference]: Finished difference Result 494 states and 751 transitions. [2020-10-27 23:57:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:57:34,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-10-27 23:57:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:34,340 INFO L225 Difference]: With dead ends: 494 [2020-10-27 23:57:34,340 INFO L226 Difference]: Without dead ends: 343 [2020-10-27 23:57:34,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:57:34,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-27 23:57:34,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 340. [2020-10-27 23:57:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-27 23:57:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 507 transitions. [2020-10-27 23:57:34,376 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 507 transitions. Word has length 92 [2020-10-27 23:57:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:34,377 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 507 transitions. [2020-10-27 23:57:34,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:57:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 507 transitions. [2020-10-27 23:57:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 23:57:34,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:34,379 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] [2020-10-27 23:57:34,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:57:34,380 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:34,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1751366750, now seen corresponding path program 1 times [2020-10-27 23:57:34,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:34,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121700737] [2020-10-27 23:57:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:34,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:34,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:34,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:34,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:35,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:39,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:39,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:39,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 23:57:39,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:57:39,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:57:39,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:39,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:57:39,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:57:39,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:57:39,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:39,845 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:57:39,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:39,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:39,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:39,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:39,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:57:39,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:39,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:39,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:39,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:39,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:57:39,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121700737] [2020-10-27 23:57:39,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:39,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:57:39,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822881620] [2020-10-27 23:57:39,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:57:39,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:57:39,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:57:39,933 INFO L87 Difference]: Start difference. First operand 340 states and 507 transitions. Second operand 4 states. [2020-10-27 23:57:40,346 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:57:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:41,152 INFO L93 Difference]: Finished difference Result 874 states and 1355 transitions. [2020-10-27 23:57:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:57:41,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-27 23:57:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:41,164 INFO L225 Difference]: With dead ends: 874 [2020-10-27 23:57:41,164 INFO L226 Difference]: Without dead ends: 591 [2020-10-27 23:57:41,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:57:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-27 23:57:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 588. [2020-10-27 23:57:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2020-10-27 23:57:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 899 transitions. [2020-10-27 23:57:41,246 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 899 transitions. Word has length 93 [2020-10-27 23:57:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:41,247 INFO L481 AbstractCegarLoop]: Abstraction has 588 states and 899 transitions. [2020-10-27 23:57:41,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:57:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 899 transitions. [2020-10-27 23:57:41,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 23:57:41,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:41,249 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] [2020-10-27 23:57:41,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:57:41,249 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1432492344, now seen corresponding path program 1 times [2020-10-27 23:57:41,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:41,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225591623] [2020-10-27 23:57:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:41,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:41,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:41,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:41,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:41,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:42,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:42,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:46,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:46,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 23:57:46,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:57:46,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:57:46,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:46,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:57:46,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 23:57:46,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 23:57:46,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:46,683 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:57:46,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:46,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:46,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:46,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:46,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:57:46,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:46,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:46,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:46,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:46,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:57:46,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225591623] [2020-10-27 23:57:46,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:46,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:57:46,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740710202] [2020-10-27 23:57:46,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:57:46,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:57:46,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:57:46,745 INFO L87 Difference]: Start difference. First operand 588 states and 899 transitions. Second operand 7 states. [2020-10-27 23:57:47,141 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:57:48,075 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 23:57:48,470 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:57:49,289 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:57:49,665 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:57:50,290 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:57:50,670 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:57:51,352 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 23:57:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:51,463 INFO L93 Difference]: Finished difference Result 4824 states and 7611 transitions. [2020-10-27 23:57:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:57:51,464 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-27 23:57:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:51,497 INFO L225 Difference]: With dead ends: 4824 [2020-10-27 23:57:51,497 INFO L226 Difference]: Without dead ends: 4293 [2020-10-27 23:57:51,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:57:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2020-10-27 23:57:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 1636. [2020-10-27 23:57:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-10-27 23:57:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2559 transitions. [2020-10-27 23:57:51,635 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2559 transitions. Word has length 94 [2020-10-27 23:57:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:51,635 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 2559 transitions. [2020-10-27 23:57:51,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:57:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2559 transitions. [2020-10-27 23:57:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 23:57:51,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:51,637 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] [2020-10-27 23:57:51,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:57:51,638 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:51,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:51,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2027272461, now seen corresponding path program 1 times [2020-10-27 23:57:51,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:51,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280845716] [2020-10-27 23:57:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:51,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:51,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:51,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:51,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:51,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:54,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:56,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:56,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 23:57:56,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:57:56,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:57:56,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:56,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:57:56,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:57:56,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:57:56,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:57,191 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:57:57,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:57,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:57,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:57,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:57,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:57,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:57:57,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:57,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:57,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:57,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:57:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:57:57,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280845716] [2020-10-27 23:57:57,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:57,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:57:57,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859259743] [2020-10-27 23:57:57,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:57:57,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:57,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:57:57,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:57:57,288 INFO L87 Difference]: Start difference. First operand 1636 states and 2559 transitions. Second operand 4 states. [2020-10-27 23:57:57,683 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:57:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:58,510 INFO L93 Difference]: Finished difference Result 4602 states and 7251 transitions. [2020-10-27 23:57:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:57:58,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-27 23:57:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:58,537 INFO L225 Difference]: With dead ends: 4602 [2020-10-27 23:57:58,538 INFO L226 Difference]: Without dead ends: 3023 [2020-10-27 23:57:58,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:57:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3023 states. [2020-10-27 23:57:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3023 to 3020. [2020-10-27 23:57:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3020 states. [2020-10-27 23:57:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 4723 transitions. [2020-10-27 23:57:58,745 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 4723 transitions. Word has length 94 [2020-10-27 23:57:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:58,745 INFO L481 AbstractCegarLoop]: Abstraction has 3020 states and 4723 transitions. [2020-10-27 23:57:58,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:57:58,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 4723 transitions. [2020-10-27 23:57:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 23:57:58,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:58,747 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] [2020-10-27 23:57:58,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:57:58,748 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:58,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2113823784, now seen corresponding path program 1 times [2020-10-27 23:57:58,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:58,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593137151] [2020-10-27 23:57:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:58,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:58,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:58,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:58,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:03,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:03,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 23:58:03,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:58:03,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:58:03,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:03,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:58:03,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:58:03,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 23:58:03,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:04,208 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:58:04,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:58:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:04,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:04,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:04,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:58:04,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:58:04,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:58:04,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:58:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:58:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:58:04,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:58:04,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593137151] [2020-10-27 23:58:04,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:58:04,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:58:04,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615941003] [2020-10-27 23:58:04,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:58:04,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:58:04,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:58:04,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:58:04,276 INFO L87 Difference]: Start difference. First operand 3020 states and 4723 transitions. Second operand 7 states. [2020-10-27 23:58:04,696 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:05,603 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 23:58:05,984 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:06,831 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:58:07,193 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:58:08,127 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:58:08,505 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:09,339 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 23:58:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:58:09,491 INFO L93 Difference]: Finished difference Result 20811 states and 32703 transitions. [2020-10-27 23:58:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:58:09,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-27 23:58:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:58:09,590 INFO L225 Difference]: With dead ends: 20811 [2020-10-27 23:58:09,590 INFO L226 Difference]: Without dead ends: 18832 [2020-10-27 23:58:09,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:58:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18832 states. [2020-10-27 23:58:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18832 to 5995. [2020-10-27 23:58:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5995 states. [2020-10-27 23:58:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5995 states to 5995 states and 9375 transitions. [2020-10-27 23:58:10,132 INFO L78 Accepts]: Start accepts. Automaton has 5995 states and 9375 transitions. Word has length 95 [2020-10-27 23:58:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:58:10,133 INFO L481 AbstractCegarLoop]: Abstraction has 5995 states and 9375 transitions. [2020-10-27 23:58:10,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:58:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5995 states and 9375 transitions. [2020-10-27 23:58:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 23:58:10,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:58:10,134 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] [2020-10-27 23:58:10,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:58:10,135 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:58:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:58:10,136 INFO L82 PathProgramCache]: Analyzing trace with hash -562303464, now seen corresponding path program 1 times [2020-10-27 23:58:10,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:58:10,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838020451] [2020-10-27 23:58:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:58:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:10,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:10,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:10,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:10,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:13,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:15,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:15,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 23:58:15,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:58:15,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 23:58:15,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:58:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:58:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 23:58:15,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:58:15,623 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:58:15,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:58:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:15,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:15,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:15,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:58:15,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:58:15,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:58:15,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:58:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:58:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:58:15,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:58:15,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838020451] [2020-10-27 23:58:15,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:58:15,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:58:15,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343831655] [2020-10-27 23:58:15,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:58:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:58:15,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:58:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:58:15,685 INFO L87 Difference]: Start difference. First operand 5995 states and 9375 transitions. Second operand 7 states. [2020-10-27 23:58:16,127 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:17,118 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 23:58:17,550 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:18,394 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:58:18,777 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:58:19,658 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:58:20,088 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:20,921 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 23:58:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:58:21,130 INFO L93 Difference]: Finished difference Result 23678 states and 37044 transitions. [2020-10-27 23:58:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:58:21,130 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-27 23:58:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:58:21,181 INFO L225 Difference]: With dead ends: 23678 [2020-10-27 23:58:21,181 INFO L226 Difference]: Without dead ends: 19739 [2020-10-27 23:58:21,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:58:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19739 states. [2020-10-27 23:58:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19739 to 7955. [2020-10-27 23:58:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7955 states. [2020-10-27 23:58:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7955 states to 7955 states and 12455 transitions. [2020-10-27 23:58:21,921 INFO L78 Accepts]: Start accepts. Automaton has 7955 states and 12455 transitions. Word has length 95 [2020-10-27 23:58:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:58:21,921 INFO L481 AbstractCegarLoop]: Abstraction has 7955 states and 12455 transitions. [2020-10-27 23:58:21,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:58:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 7955 states and 12455 transitions. [2020-10-27 23:58:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 23:58:21,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:58:21,923 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] [2020-10-27 23:58:21,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:58:21,923 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:58:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:58:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash 272899027, now seen corresponding path program 1 times [2020-10-27 23:58:21,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:58:21,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037056788] [2020-10-27 23:58:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:58:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:21,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:26,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:26,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 23:58:26,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:58:26,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:58:26,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:26,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:58:26,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:58:26,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:58:26,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:27,345 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:58:27,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:58:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:27,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:27,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:27,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:58:27,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:58:27,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:58:27,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:27,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:58:27,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:58:27,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:58:27,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:58:27,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037056788] [2020-10-27 23:58:27,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:58:27,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:58:27,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886076146] [2020-10-27 23:58:27,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:58:27,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:58:27,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:58:27,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:58:27,391 INFO L87 Difference]: Start difference. First operand 7955 states and 12455 transitions. Second operand 4 states. [2020-10-27 23:58:27,804 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:58:29,117 INFO L93 Difference]: Finished difference Result 22658 states and 35479 transitions. [2020-10-27 23:58:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:58:29,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-27 23:58:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:58:29,154 INFO L225 Difference]: With dead ends: 22658 [2020-10-27 23:58:29,154 INFO L226 Difference]: Without dead ends: 14786 [2020-10-27 23:58:29,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:58:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14786 states. [2020-10-27 23:58:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14786 to 14783. [2020-10-27 23:58:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14783 states. [2020-10-27 23:58:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14783 states to 14783 states and 22991 transitions. [2020-10-27 23:58:30,237 INFO L78 Accepts]: Start accepts. Automaton has 14783 states and 22991 transitions. Word has length 95 [2020-10-27 23:58:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:58:30,237 INFO L481 AbstractCegarLoop]: Abstraction has 14783 states and 22991 transitions. [2020-10-27 23:58:30,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:58:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 14783 states and 22991 transitions. [2020-10-27 23:58:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 23:58:30,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:58:30,239 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] [2020-10-27 23:58:30,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:58:30,239 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:58:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:58:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1942556259, now seen corresponding path program 1 times [2020-10-27 23:58:30,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:58:30,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633249660] [2020-10-27 23:58:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:58:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:30,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:30,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:30,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:30,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:32,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:35,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:35,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 23:58:35,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:58:35,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:58:35,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:35,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:58:35,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:58:35,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 23:58:35,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:35,691 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:58:35,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:58:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:35,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:35,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:35,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:58:35,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:58:35,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:58:35,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:58:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:58:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:58:35,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:58:35,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633249660] [2020-10-27 23:58:35,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:58:35,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:58:35,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578236301] [2020-10-27 23:58:35,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:58:35,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:58:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:58:35,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:58:35,741 INFO L87 Difference]: Start difference. First operand 14783 states and 22991 transitions. Second operand 7 states. [2020-10-27 23:58:36,177 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:37,094 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 23:58:37,491 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:38,563 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:58:38,948 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:58:41,248 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:58:41,637 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:43,700 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 23:58:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:58:44,223 INFO L93 Difference]: Finished difference Result 88156 states and 137125 transitions. [2020-10-27 23:58:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:58:44,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-27 23:58:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:58:44,491 INFO L225 Difference]: With dead ends: 88156 [2020-10-27 23:58:44,491 INFO L226 Difference]: Without dead ends: 80793 [2020-10-27 23:58:44,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:58:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80793 states. [2020-10-27 23:58:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80793 to 22052. [2020-10-27 23:58:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22052 states. [2020-10-27 23:58:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22052 states to 22052 states and 34164 transitions. [2020-10-27 23:58:46,779 INFO L78 Accepts]: Start accepts. Automaton has 22052 states and 34164 transitions. Word has length 96 [2020-10-27 23:58:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:58:46,780 INFO L481 AbstractCegarLoop]: Abstraction has 22052 states and 34164 transitions. [2020-10-27 23:58:46,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:58:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22052 states and 34164 transitions. [2020-10-27 23:58:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 23:58:46,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:58:46,781 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] [2020-10-27 23:58:46,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:58:46,781 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:58:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:58:46,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1414255437, now seen corresponding path program 1 times [2020-10-27 23:58:46,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:58:46,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057128726] [2020-10-27 23:58:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:58:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:46,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:46,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:46,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:46,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:47,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:49,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:51,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:51,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 23:58:51,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:58:51,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:58:51,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:51,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:58:51,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:58:51,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 23:58:51,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:52,202 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:58:52,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:58:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:52,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:52,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:52,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:58:52,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:58:52,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:58:52,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:52,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:58:52,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:58:52,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:58:52,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:58:52,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057128726] [2020-10-27 23:58:52,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:58:52,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:58:52,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674057344] [2020-10-27 23:58:52,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:58:52,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:58:52,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:58:52,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:58:52,245 INFO L87 Difference]: Start difference. First operand 22052 states and 34164 transitions. Second operand 7 states. [2020-10-27 23:58:52,671 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:53,527 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 23:58:53,918 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:58:55,058 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:58:55,438 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:58:58,017 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:58:58,407 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:59:00,428 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 23:59:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:59:01,282 INFO L93 Difference]: Finished difference Result 87343 states and 135209 transitions. [2020-10-27 23:59:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:59:01,283 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-27 23:59:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:59:01,437 INFO L225 Difference]: With dead ends: 87343 [2020-10-27 23:59:01,437 INFO L226 Difference]: Without dead ends: 72684 [2020-10-27 23:59:01,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:59:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72684 states. [2020-10-27 23:59:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72684 to 29343. [2020-10-27 23:59:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29343 states. [2020-10-27 23:59:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29343 states to 29343 states and 45487 transitions. [2020-10-27 23:59:03,985 INFO L78 Accepts]: Start accepts. Automaton has 29343 states and 45487 transitions. Word has length 96 [2020-10-27 23:59:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:59:03,985 INFO L481 AbstractCegarLoop]: Abstraction has 29343 states and 45487 transitions. [2020-10-27 23:59:03,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:59:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 29343 states and 45487 transitions. [2020-10-27 23:59:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 23:59:03,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:59:03,986 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] [2020-10-27 23:59:03,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:59:03,987 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:59:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:59:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1329191539, now seen corresponding path program 1 times [2020-10-27 23:59:03,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:59:03,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325886863] [2020-10-27 23:59:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:59:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:04,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:04,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:04,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:04,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:06,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:09,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:09,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 23:59:09,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:59:09,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:59:09,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:59:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:59:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 23:59:09,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:59:09,421 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:59:09,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:59:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:09,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:09,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:09,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:59:09,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:59:09,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:59:09,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:09,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:59:09,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:59:09,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:59:09,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:59:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:59:09,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325886863] [2020-10-27 23:59:09,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:59:09,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:59:09,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673396896] [2020-10-27 23:59:09,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:59:09,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:59:09,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:59:09,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:59:09,457 INFO L87 Difference]: Start difference. First operand 29343 states and 45487 transitions. Second operand 7 states. [2020-10-27 23:59:09,897 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:59:10,833 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 23:59:11,236 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:59:12,432 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:59:12,813 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:59:15,971 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:59:16,342 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:59:18,930 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 23:59:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:59:19,967 INFO L93 Difference]: Finished difference Result 99443 states and 153888 transitions. [2020-10-27 23:59:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:59:19,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-27 23:59:19,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:59:20,085 INFO L225 Difference]: With dead ends: 99443 [2020-10-27 23:59:20,085 INFO L226 Difference]: Without dead ends: 84784 [2020-10-27 23:59:20,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:59:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84784 states. [2020-10-27 23:59:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84784 to 36639. [2020-10-27 23:59:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36639 states. [2020-10-27 23:59:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36639 states to 36639 states and 56815 transitions. [2020-10-27 23:59:23,792 INFO L78 Accepts]: Start accepts. Automaton has 36639 states and 56815 transitions. Word has length 96 [2020-10-27 23:59:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:59:23,792 INFO L481 AbstractCegarLoop]: Abstraction has 36639 states and 56815 transitions. [2020-10-27 23:59:23,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:59:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 36639 states and 56815 transitions. [2020-10-27 23:59:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 23:59:23,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:59:23,794 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] [2020-10-27 23:59:23,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:59:23,794 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:59:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:59:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash -493989048, now seen corresponding path program 1 times [2020-10-27 23:59:23,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:59:23,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390946723] [2020-10-27 23:59:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:59:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:23,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:23,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:24,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:26,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:26,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 23:59:26,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:59:26,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3047 [2020-10-27 23:59:26,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:26,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:59:26,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:59:26,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:59:26,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:59:27,315 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:59:27,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:59:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:27,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:27,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:27,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:59:27,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:59:27,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:59:27,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:27,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:59:27,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:59:27,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:59:27,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:59:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:59:27,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390946723] [2020-10-27 23:59:27,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:59:27,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:59:27,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902713936] [2020-10-27 23:59:27,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:59:27,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:59:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:59:27,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:59:27,360 INFO L87 Difference]: Start difference. First operand 36639 states and 56815 transitions. Second operand 4 states. [2020-10-27 23:59:27,766 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:59:33,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:59:33,850 INFO L93 Difference]: Finished difference Result 104628 states and 161927 transitions. [2020-10-27 23:59:33,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:59:33,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-27 23:59:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:59:33,950 INFO L225 Difference]: With dead ends: 104628 [2020-10-27 23:59:33,950 INFO L226 Difference]: Without dead ends: 68062 [2020-10-27 23:59:34,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:59:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68062 states. [2020-10-27 23:59:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68062 to 68059. [2020-10-27 23:59:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68059 states. [2020-10-27 23:59:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68059 states to 68059 states and 104551 transitions. [2020-10-27 23:59:40,234 INFO L78 Accepts]: Start accepts. Automaton has 68059 states and 104551 transitions. Word has length 96 [2020-10-27 23:59:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:59:40,234 INFO L481 AbstractCegarLoop]: Abstraction has 68059 states and 104551 transitions. [2020-10-27 23:59:40,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:59:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 68059 states and 104551 transitions. [2020-10-27 23:59:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 23:59:40,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:59:40,236 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] [2020-10-27 23:59:40,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:59:40,236 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:59:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:59:40,237 INFO L82 PathProgramCache]: Analyzing trace with hash 609096591, now seen corresponding path program 1 times [2020-10-27 23:59:40,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:59:40,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999272736] [2020-10-27 23:59:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:59:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:40,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:40,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:40,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:40,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:45,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:45,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 23:59:45,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:59:45,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:59:45,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:59:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:59:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 23:59:45,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:59:45,683 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:59:45,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:59:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:45,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:45,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:45,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:59:45,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:59:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:59:45,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:59:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:59:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:59:45,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:59:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:59:45,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999272736] [2020-10-27 23:59:45,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:59:45,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:59:45,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643440457] [2020-10-27 23:59:45,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:59:45,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:59:45,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:59:45,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:59:45,722 INFO L87 Difference]: Start difference. First operand 68059 states and 104551 transitions. Second operand 7 states. [2020-10-27 23:59:46,162 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:59:47,107 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 23:59:47,513 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:59:49,891 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:59:50,306 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:05,337 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:05,868 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:00:16,446 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:00:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:19,653 INFO L93 Difference]: Finished difference Result 366840 states and 563069 transitions. [2020-10-28 00:00:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:00:19,657 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-28 00:00:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:20,451 INFO L225 Difference]: With dead ends: 366840 [2020-10-28 00:00:20,451 INFO L226 Difference]: Without dead ends: 339573 [2020-10-28 00:00:20,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:00:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339573 states. [2020-10-28 00:00:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339573 to 81376. [2020-10-28 00:00:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81376 states. [2020-10-28 00:00:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81376 states to 81376 states and 124396 transitions. [2020-10-28 00:00:31,918 INFO L78 Accepts]: Start accepts. Automaton has 81376 states and 124396 transitions. Word has length 97 [2020-10-28 00:00:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:31,919 INFO L481 AbstractCegarLoop]: Abstraction has 81376 states and 124396 transitions. [2020-10-28 00:00:31,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:00:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 81376 states and 124396 transitions. [2020-10-28 00:00:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 00:00:31,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:31,934 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] [2020-10-28 00:00:31,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:00:31,934 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:31,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1244909797, now seen corresponding path program 1 times [2020-10-28 00:00:31,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:31,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806508902] [2020-10-28 00:00:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:31,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:31,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:32,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:32,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:33,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:36,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:36,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 00:00:36,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:00:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 00:00:36,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:00:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:00:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 00:00:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:37,410 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:00:37,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:37,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:37,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:37,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:37,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:37,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:00:37,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:37,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:37,447 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 00:00:37,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806508902] [2020-10-28 00:00:37,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:37,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:00:37,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666823398] [2020-10-28 00:00:37,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:00:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:37,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:00:37,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:00:37,449 INFO L87 Difference]: Start difference. First operand 81376 states and 124396 transitions. Second operand 7 states. [2020-10-28 00:00:37,881 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:38,824 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:00:39,230 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:00:41,884 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:00:42,305 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 203