/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_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:39:01,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:39:01,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:39:01,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:39:01,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:39:01,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:39:01,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:39:01,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:39:01,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:39:01,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:39:01,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:39:01,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:39:01,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:39:01,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:39:01,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:39:01,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:39:01,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:39:01,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:39:01,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:39:01,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:39:01,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:39:01,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:39:01,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:39:01,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:39:01,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:39:01,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:39:01,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:39:01,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:39:01,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:39:01,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:39:01,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:39:01,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:39:01,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:39:01,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:39:01,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:39:01,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:39:01,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:39:01,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:39:01,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:39:01,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:39:01,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:39:01,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:39:01,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:39:01,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:39:01,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:39:01,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:39:01,886 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:39:01,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:39:01,887 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:39:01,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:39:01,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:39:01,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:39:01,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:39:01,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:39:01,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:39:01,888 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:39:01,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:39:01,889 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:39:01,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:39:01,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:39:01,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:39:01,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:39:01,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:39:01,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:39:01,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:39:01,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:39:01,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:39:01,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:39:01,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:39:01,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:39:01,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:39:01,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:39:02,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:39:02,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:39:02,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:39:02,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:39:02,394 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:39:02,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 00:39:02,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/164fd4fd9/7889403117424c8c90b053a81cc29d14/FLAG711563e17 [2020-10-28 00:39:03,527 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:39:03,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 00:39:03,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/164fd4fd9/7889403117424c8c90b053a81cc29d14/FLAG711563e17 [2020-10-28 00:39:04,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/164fd4fd9/7889403117424c8c90b053a81cc29d14 [2020-10-28 00:39:04,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:39:04,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:39:04,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:39:04,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:39:04,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:39:04,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:39:04" (1/1) ... [2020-10-28 00:39:04,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ccef6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:04, skipping insertion in model container [2020-10-28 00:39:04,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:39:04" (1/1) ... [2020-10-28 00:39:04,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:39:04,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:39:06,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:39:06,052 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:39:07,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:39:07,149 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:39:07,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07 WrapperNode [2020-10-28 00:39:07,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:39:07,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:39:07,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:39:07,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:39:07,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07" (1/1) ... [2020-10-28 00:39:07,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07" (1/1) ... [2020-10-28 00:39:07,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07" (1/1) ... [2020-10-28 00:39:07,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07" (1/1) ... [2020-10-28 00:39:07,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07" (1/1) ... [2020-10-28 00:39:07,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07" (1/1) ... [2020-10-28 00:39:07,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07" (1/1) ... [2020-10-28 00:39:07,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:39:07,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:39:07,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:39:07,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:39:07,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:39:07,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:39:07,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:39:07,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:39:07,511 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:39:07,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:39:07,512 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:39:07,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:39:07,512 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:39:07,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:39:07,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:39:07,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:39:07,513 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:39:07,514 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:39:07,514 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:39:07,514 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:39:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:39:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:39:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:39:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:39:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:39:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:39:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:39:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:39:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:39:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:39:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:39:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:39:07,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:39:07,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:39:12,759 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:39:12,760 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:39:12,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:39:12 BoogieIcfgContainer [2020-10-28 00:39:12,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:39:12,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:39:12,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:39:12,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:39:12,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:39:04" (1/3) ... [2020-10-28 00:39:12,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fabb05f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:39:12, skipping insertion in model container [2020-10-28 00:39:12,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:07" (2/3) ... [2020-10-28 00:39:12,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fabb05f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:39:12, skipping insertion in model container [2020-10-28 00:39:12,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:39:12" (3/3) ... [2020-10-28 00:39:12,774 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 00:39:12,786 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:39:12,793 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:39:12,807 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:39:12,843 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:39:12,843 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:39:12,843 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:39:12,844 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:39:12,844 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:39:12,844 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:39:12,844 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:39:12,844 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:39:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states. [2020-10-28 00:39:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-28 00:39:12,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:12,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:39:12,968 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1619916153, now seen corresponding path program 1 times [2020-10-28 00:39:12,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:12,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992342064] [2020-10-28 00:39:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:15,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:17,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:18,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:19,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:20,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:20,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 493 [2020-10-28 00:39:20,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:39:20,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5587 [2020-10-28 00:39:20,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:20,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:39:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:39:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 253 [2020-10-28 00:39:20,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:39:22,756 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 00:39:22,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:22,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:22,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:22,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:22,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:22,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-28 00:39:22,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:22,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:22,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:22,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:22,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:23,537 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 00:39:23,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992342064] [2020-10-28 00:39:23,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:23,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:39:23,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086304078] [2020-10-28 00:39:23,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:39:23,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:39:23,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:23,575 INFO L87 Difference]: Start difference. First operand 1488 states. Second operand 5 states. [2020-10-28 00:39:40,256 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-28 00:39:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:43,785 INFO L93 Difference]: Finished difference Result 4399 states and 7947 transitions. [2020-10-28 00:39:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:39:43,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2020-10-28 00:39:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:43,836 INFO L225 Difference]: With dead ends: 4399 [2020-10-28 00:39:43,837 INFO L226 Difference]: Without dead ends: 2918 [2020-10-28 00:39:43,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:39:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2020-10-28 00:39:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2875. [2020-10-28 00:39:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2875 states. [2020-10-28 00:39:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 4739 transitions. [2020-10-28 00:39:44,127 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 4739 transitions. Word has length 485 [2020-10-28 00:39:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:44,133 INFO L481 AbstractCegarLoop]: Abstraction has 2875 states and 4739 transitions. [2020-10-28 00:39:44,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:39:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 4739 transitions. [2020-10-28 00:39:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-28 00:39:44,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:44,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:39:44,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:39:44,158 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:44,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1633551899, now seen corresponding path program 1 times [2020-10-28 00:39:44,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:44,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170266227] [2020-10-28 00:39:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:44,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:44,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:45,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:46,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:46,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:47,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:47,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:47,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:48,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:49,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:49,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:49,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 495 [2020-10-28 00:39:49,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:39:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-28 00:39:49,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:49,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:39:49,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:39:49,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 196 [2020-10-28 00:39:49,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:39:51,230 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 00:39:51,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:51,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:51,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:51,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:51,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:51,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 00:39:51,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:51,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:51,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:51,816 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 00:39:51,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170266227] [2020-10-28 00:39:51,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:51,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:39:51,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997867321] [2020-10-28 00:39:51,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:39:51,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:39:51,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:51,833 INFO L87 Difference]: Start difference. First operand 2875 states and 4739 transitions. Second operand 4 states. [2020-10-28 00:40:12,218 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-28 00:40:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:15,407 INFO L93 Difference]: Finished difference Result 8315 states and 13663 transitions. [2020-10-28 00:40:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:40:15,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-10-28 00:40:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:15,440 INFO L225 Difference]: With dead ends: 8315 [2020-10-28 00:40:15,441 INFO L226 Difference]: Without dead ends: 5669 [2020-10-28 00:40:15,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2020-10-28 00:40:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 5628. [2020-10-28 00:40:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5628 states. [2020-10-28 00:40:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 9250 transitions. [2020-10-28 00:40:15,679 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 9250 transitions. Word has length 487 [2020-10-28 00:40:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:15,680 INFO L481 AbstractCegarLoop]: Abstraction has 5628 states and 9250 transitions. [2020-10-28 00:40:15,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:40:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 9250 transitions. [2020-10-28 00:40:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-28 00:40:15,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:15,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:15,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:40:15,702 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:15,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2097905034, now seen corresponding path program 1 times [2020-10-28 00:40:15,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:15,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412810735] [2020-10-28 00:40:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:15,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:15,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:16,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:17,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:18,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:19,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:19,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:20,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:20,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:20,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:20,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-10-28 00:40:20,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:40:20,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5200 [2020-10-28 00:40:20,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:40:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:40:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-28 00:40:20,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:22,536 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 00:40:22,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:22,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:22,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:22,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:22,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:22,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:40:22,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:22,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:22,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:22,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:22,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:22,954 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 00:40:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412810735] [2020-10-28 00:40:22,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:22,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:40:22,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219781205] [2020-10-28 00:40:22,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:40:22,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:22,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:40:22,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:40:22,958 INFO L87 Difference]: Start difference. First operand 5628 states and 9250 transitions. Second operand 4 states. [2020-10-28 00:40:42,521 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-28 00:40:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:45,857 INFO L93 Difference]: Finished difference Result 16412 states and 26908 transitions. [2020-10-28 00:40:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:40:45,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-10-28 00:40:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:45,918 INFO L225 Difference]: With dead ends: 16412 [2020-10-28 00:40:45,919 INFO L226 Difference]: Without dead ends: 11070 [2020-10-28 00:40:45,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11070 states. [2020-10-28 00:40:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11070 to 11031. [2020-10-28 00:40:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11031 states. [2020-10-28 00:40:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 18061 transitions. [2020-10-28 00:40:46,422 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 18061 transitions. Word has length 488 [2020-10-28 00:40:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:46,423 INFO L481 AbstractCegarLoop]: Abstraction has 11031 states and 18061 transitions. [2020-10-28 00:40:46,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:40:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 18061 transitions. [2020-10-28 00:40:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-28 00:40:46,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:46,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:46,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:40:46,460 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:46,461 INFO L82 PathProgramCache]: Analyzing trace with hash 841240933, now seen corresponding path program 1 times [2020-10-28 00:40:46,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:46,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263935878] [2020-10-28 00:40:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:46,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:46,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:46,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:47,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:48,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:48,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:49,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:49,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:49,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:50,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:50,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:51,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:51,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:51,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:51,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-10-28 00:40:51,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:40:51,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-28 00:40:51,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:40:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:40:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:40:51,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:53,263 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 00:40:53,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:53,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:53,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:53,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:53,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:53,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 00:40:53,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:53,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:53,665 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 00:40:53,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263935878] [2020-10-28 00:40:53,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:53,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:40:53,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791964969] [2020-10-28 00:40:53,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:40:53,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:53,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:40:53,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:53,669 INFO L87 Difference]: Start difference. First operand 11031 states and 18061 transitions. Second operand 5 states. [2020-10-28 00:41:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:16,502 INFO L93 Difference]: Finished difference Result 31510 states and 51273 transitions. [2020-10-28 00:41:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:41:16,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-10-28 00:41:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:16,564 INFO L225 Difference]: With dead ends: 31510 [2020-10-28 00:41:16,565 INFO L226 Difference]: Without dead ends: 21602 [2020-10-28 00:41:16,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:41:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21602 states. [2020-10-28 00:41:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21602 to 11912. [2020-10-28 00:41:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11912 states. [2020-10-28 00:41:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11912 states to 11912 states and 19652 transitions. [2020-10-28 00:41:17,284 INFO L78 Accepts]: Start accepts. Automaton has 11912 states and 19652 transitions. Word has length 488 [2020-10-28 00:41:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:17,284 INFO L481 AbstractCegarLoop]: Abstraction has 11912 states and 19652 transitions. [2020-10-28 00:41:17,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:41:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 11912 states and 19652 transitions. [2020-10-28 00:41:17,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-28 00:41:17,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:17,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:17,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:41:17,316 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:17,317 INFO L82 PathProgramCache]: Analyzing trace with hash -695841725, now seen corresponding path program 1 times [2020-10-28 00:41:17,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:17,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246600929] [2020-10-28 00:41:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:17,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:17,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:17,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:17,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:18,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:18,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:18,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:18,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:19,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:19,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:20,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:20,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:22,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:22,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 497 [2020-10-28 00:41:22,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:41:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 00:41:22,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 00:41:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 253 [2020-10-28 00:41:22,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:24,036 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 00:41:24,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:24,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:24,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:24,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:24,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:24,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:41:24,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:24,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:24,398 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 00:41:24,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246600929] [2020-10-28 00:41:24,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:24,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:24,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101849957] [2020-10-28 00:41:24,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:24,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:24,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:24,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:24,401 INFO L87 Difference]: Start difference. First operand 11912 states and 19652 transitions. Second operand 4 states. [2020-10-28 00:41:45,964 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-28 00:41:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:49,619 INFO L93 Difference]: Finished difference Result 33534 states and 54941 transitions. [2020-10-28 00:41:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:41:49,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-10-28 00:41:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:49,672 INFO L225 Difference]: With dead ends: 33534 [2020-10-28 00:41:49,673 INFO L226 Difference]: Without dead ends: 22904 [2020-10-28 00:41:49,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22904 states. [2020-10-28 00:41:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22904 to 22867. [2020-10-28 00:41:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22867 states. [2020-10-28 00:41:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22867 states to 22867 states and 37460 transitions. [2020-10-28 00:41:50,935 INFO L78 Accepts]: Start accepts. Automaton has 22867 states and 37460 transitions. Word has length 489 [2020-10-28 00:41:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:50,935 INFO L481 AbstractCegarLoop]: Abstraction has 22867 states and 37460 transitions. [2020-10-28 00:41:50,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:41:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22867 states and 37460 transitions. [2020-10-28 00:41:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-28 00:41:50,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:50,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:50,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:41:50,995 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:50,995 INFO L82 PathProgramCache]: Analyzing trace with hash -217739773, now seen corresponding path program 1 times [2020-10-28 00:41:50,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:50,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117921399] [2020-10-28 00:41:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:51,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:52,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:52,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:53,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:53,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:53,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:53,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:54,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:54,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:56,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:56,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 499 [2020-10-28 00:41:56,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:41:56,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 00:41:56,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:56,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-10-28 00:41:56,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 00:41:56,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:57,511 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 00:41:57,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:57,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:57,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:57,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:57,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:57,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:41:57,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:57,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:57,713 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 00:41:57,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117921399] [2020-10-28 00:41:57,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:57,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:57,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234082098] [2020-10-28 00:41:57,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:57,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:57,716 INFO L87 Difference]: Start difference. First operand 22867 states and 37460 transitions. Second operand 4 states. [2020-10-28 00:42:15,085 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-28 00:42:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:15,336 INFO L93 Difference]: Finished difference Result 43384 states and 69989 transitions. [2020-10-28 00:42:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:42:15,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-10-28 00:42:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:15,412 INFO L225 Difference]: With dead ends: 43384 [2020-10-28 00:42:15,413 INFO L226 Difference]: Without dead ends: 30086 [2020-10-28 00:42:15,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:42:15,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30086 states. [2020-10-28 00:42:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30086 to 25923. [2020-10-28 00:42:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25923 states. [2020-10-28 00:42:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25923 states to 25923 states and 42500 transitions. [2020-10-28 00:42:16,494 INFO L78 Accepts]: Start accepts. Automaton has 25923 states and 42500 transitions. Word has length 491 [2020-10-28 00:42:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:16,494 INFO L481 AbstractCegarLoop]: Abstraction has 25923 states and 42500 transitions. [2020-10-28 00:42:16,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:42:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 25923 states and 42500 transitions. [2020-10-28 00:42:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-28 00:42:16,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:16,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:16,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:42:16,534 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash -149161371, now seen corresponding path program 1 times [2020-10-28 00:42:16,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:16,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236657780] [2020-10-28 00:42:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:16,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:16,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:16,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:16,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:16,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:17,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:17,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:17,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:17,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:18,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:19,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:19,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:20,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:20,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:21,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:21,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:21,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:21,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:21,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 499 [2020-10-28 00:42:21,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 00:42:21,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 00:42:21,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:21,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:21,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 00:42:21,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 00:42:21,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:23,052 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 00:42:23,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:23,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:23,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:23,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:23,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:23,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:42:23,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:23,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:23,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:23,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:23,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:42:23,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236657780] [2020-10-28 00:42:23,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:23,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:23,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759381110] [2020-10-28 00:42:23,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:23,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:23,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:23,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:23,274 INFO L87 Difference]: Start difference. First operand 25923 states and 42500 transitions. Second operand 4 states.