/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:19:51,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:19:51,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:19:51,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:19:51,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:19:51,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:19:51,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:19:51,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:19:51,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:19:51,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:19:51,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:19:51,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:19:51,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:19:51,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:19:51,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:19:51,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:19:51,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:19:51,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:19:51,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:19:51,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:19:51,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:19:51,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:19:51,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:19:51,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:19:51,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:19:51,906 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:19:51,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:19:51,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:19:51,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:19:51,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:19:51,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:19:51,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:19:51,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:19:51,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:19:51,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:19:51,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:19:51,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:19:51,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:19:51,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:19:51,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:19:51,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:19:51,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 19:19:51,954 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:19:51,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:19:51,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:19:51,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:19:51,957 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:19:51,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:19:51,957 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:19:51,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:19:51,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:19:51,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:19:51,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:19:51,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:19:51,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:19:51,959 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:19:51,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:19:51,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:19:51,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:19:51,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:19:51,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:19:51,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:19:51,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:19:51,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:19:51,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:19:51,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:19:51,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:19:51,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:19:51,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:19:51,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:19:51,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:19:51,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:19:52,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:19:52,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:19:52,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:19:52,398 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:19:52,399 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:19:52,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:19:52,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64355a744/8e610efa701d4d91beb439ef6fa93a47/FLAG5e47c31c1 [2020-10-28 19:19:53,391 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:19:53,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:19:53,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64355a744/8e610efa701d4d91beb439ef6fa93a47/FLAG5e47c31c1 [2020-10-28 19:19:53,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64355a744/8e610efa701d4d91beb439ef6fa93a47 [2020-10-28 19:19:53,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:19:53,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:19:53,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:19:53,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:19:53,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:19:53,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:19:53" (1/1) ... [2020-10-28 19:19:53,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43aa32e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:53, skipping insertion in model container [2020-10-28 19:19:53,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:19:53" (1/1) ... [2020-10-28 19:19:53,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:19:53,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:19:54,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:19:54,644 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:19:55,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:19:55,112 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:19:55,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55 WrapperNode [2020-10-28 19:19:55,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:19:55,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:19:55,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:19:55,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:19:55,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55" (1/1) ... [2020-10-28 19:19:55,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55" (1/1) ... [2020-10-28 19:19:55,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55" (1/1) ... [2020-10-28 19:19:55,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55" (1/1) ... [2020-10-28 19:19:55,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55" (1/1) ... [2020-10-28 19:19:55,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55" (1/1) ... [2020-10-28 19:19:55,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55" (1/1) ... [2020-10-28 19:19:55,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:19:55,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:19:55,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:19:55,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:19:55,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:19:55,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:19:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:19:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:19:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:19:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:19:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:19:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:19:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:19:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:19:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:19:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:19:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:19:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:19:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:19:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:19:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:19:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:19:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:19:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:19:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:19:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:19:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:19:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:19:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:19:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:19:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:19:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:19:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:19:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:19:58,190 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:19:58,190 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:19:58,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:19:58 BoogieIcfgContainer [2020-10-28 19:19:58,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:19:58,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:19:58,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:19:58,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:19:58,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:19:53" (1/3) ... [2020-10-28 19:19:58,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61be742a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:19:58, skipping insertion in model container [2020-10-28 19:19:58,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:19:55" (2/3) ... [2020-10-28 19:19:58,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61be742a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:19:58, skipping insertion in model container [2020-10-28 19:19:58,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:19:58" (3/3) ... [2020-10-28 19:19:58,204 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:19:58,219 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:19:58,225 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:19:58,240 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:19:58,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:19:58,275 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:19:58,275 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:19:58,275 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:19:58,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:19:58,275 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:19:58,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:19:58,276 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:19:58,310 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states. [2020-10-28 19:19:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-28 19:19:58,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:58,337 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] [2020-10-28 19:19:58,337 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:58,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:58,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1938452665, now seen corresponding path program 1 times [2020-10-28 19:19:58,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:58,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533494404] [2020-10-28 19:19:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:59,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:00,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:00,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:01,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:01,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:01,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:01,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:02,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:02,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:02,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:04,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:04,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-28 19:20:04,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:20:04,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-28 19:20:04,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:04,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:04,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:20:04,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:20:04,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-28 19:20:04,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:20:05,467 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:20:05,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:20:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:05,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:05,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:05,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:20:05,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:20:05,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 19:20:05,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:05,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:20:05,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:20:05,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:20:05,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:20:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:20:05,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533494404] [2020-10-28 19:20:05,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:20:05,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:20:05,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087854235] [2020-10-28 19:20:05,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:20:05,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:20:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:20:05,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:20:05,821 INFO L87 Difference]: Start difference. First operand 656 states. Second operand 5 states. [2020-10-28 19:20:11,912 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:20:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:20:13,971 INFO L93 Difference]: Finished difference Result 1917 states and 3402 transitions. [2020-10-28 19:20:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:20:13,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-10-28 19:20:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:20:14,018 INFO L225 Difference]: With dead ends: 1917 [2020-10-28 19:20:14,020 INFO L226 Difference]: Without dead ends: 1266 [2020-10-28 19:20:14,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:20:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2020-10-28 19:20:14,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1263. [2020-10-28 19:20:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1263 states. [2020-10-28 19:20:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1974 transitions. [2020-10-28 19:20:14,252 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1974 transitions. Word has length 255 [2020-10-28 19:20:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:20:14,254 INFO L481 AbstractCegarLoop]: Abstraction has 1263 states and 1974 transitions. [2020-10-28 19:20:14,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:20:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1974 transitions. [2020-10-28 19:20:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-28 19:20:14,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:14,262 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] [2020-10-28 19:20:14,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:20:14,263 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:14,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1532072036, now seen corresponding path program 1 times [2020-10-28 19:20:14,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:14,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309445383] [2020-10-28 19:20:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:14,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:14,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:14,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:16,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:16,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:16,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:19,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:19,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-28 19:20:19,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:20:19,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 19:20:19,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:19,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:19,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:20:19,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 19:20:19,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-28 19:20:19,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:20:20,229 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:20:20,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:20:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:20,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:20,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:20,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:20:20,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:20:20,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:20:20,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:20,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:20,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:20:20,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:20:20,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:20:20,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:20:20,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309445383] [2020-10-28 19:20:20,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:20:20,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:20:20,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776973412] [2020-10-28 19:20:20,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:20:20,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:20:20,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:20:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:20:20,501 INFO L87 Difference]: Start difference. First operand 1263 states and 1974 transitions. Second operand 4 states. [2020-10-28 19:20:27,241 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2020-10-28 19:20:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:20:29,294 INFO L93 Difference]: Finished difference Result 3587 states and 5573 transitions. [2020-10-28 19:20:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:20:29,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 257 [2020-10-28 19:20:29,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:20:29,314 INFO L225 Difference]: With dead ends: 3587 [2020-10-28 19:20:29,314 INFO L226 Difference]: Without dead ends: 2464 [2020-10-28 19:20:29,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:20:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2020-10-28 19:20:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2461. [2020-10-28 19:20:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2461 states. [2020-10-28 19:20:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3827 transitions. [2020-10-28 19:20:29,482 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 3827 transitions. Word has length 257 [2020-10-28 19:20:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:20:29,483 INFO L481 AbstractCegarLoop]: Abstraction has 2461 states and 3827 transitions. [2020-10-28 19:20:29,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:20:29,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 3827 transitions. [2020-10-28 19:20:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-28 19:20:29,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:29,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:20:29,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:20:29,492 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash -928499785, now seen corresponding path program 1 times [2020-10-28 19:20:29,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:29,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122038372] [2020-10-28 19:20:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:29,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:29,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:29,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:29,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:30,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:30,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:30,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:30,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:30,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:31,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:31,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:31,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:34,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:34,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-28 19:20:34,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:20:34,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:20:34,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:34,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:20:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:20:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 19:20:34,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:35,585 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:20:35,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:20:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:35,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:35,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:35,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:20:35,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:20:35,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 19:20:35,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:35,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:35,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:20:35,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:20:35,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:20:35,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:20:35,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122038372] [2020-10-28 19:20:35,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:20:35,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:20:35,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535597058] [2020-10-28 19:20:35,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:20:35,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:20:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:20:35,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:20:35,840 INFO L87 Difference]: Start difference. First operand 2461 states and 3827 transitions. Second operand 5 states. [2020-10-28 19:20:41,480 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:20:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:20:43,810 INFO L93 Difference]: Finished difference Result 7029 states and 10863 transitions. [2020-10-28 19:20:43,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:20:43,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 257 [2020-10-28 19:20:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:20:43,839 INFO L225 Difference]: With dead ends: 7029 [2020-10-28 19:20:43,839 INFO L226 Difference]: Without dead ends: 4718 [2020-10-28 19:20:43,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:20:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2020-10-28 19:20:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 4715. [2020-10-28 19:20:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4715 states. [2020-10-28 19:20:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 7259 transitions. [2020-10-28 19:20:44,152 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 7259 transitions. Word has length 257 [2020-10-28 19:20:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:20:44,153 INFO L481 AbstractCegarLoop]: Abstraction has 4715 states and 7259 transitions. [2020-10-28 19:20:44,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:20:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 7259 transitions. [2020-10-28 19:20:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 19:20:44,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:44,166 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] [2020-10-28 19:20:44,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:20:44,166 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1366513284, now seen corresponding path program 1 times [2020-10-28 19:20:44,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:44,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343988952] [2020-10-28 19:20:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:44,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:44,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:44,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:44,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:44,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:45,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:45,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:45,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:45,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:45,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:46,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:47,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:47,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:49,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:49,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-28 19:20:49,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:20:49,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 19:20:49,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:49,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:20:49,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:20:49,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 19:20:49,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:50,019 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:20:50,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:20:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:50,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:50,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:50,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:20:50,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:20:50,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:20:50,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:50,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:20:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:20:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:20:50,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:20:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:20:50,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343988952] [2020-10-28 19:20:50,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:20:50,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:20:50,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347899874] [2020-10-28 19:20:50,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:20:50,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:20:50,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:20:50,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:20:50,240 INFO L87 Difference]: Start difference. First operand 4715 states and 7259 transitions. Second operand 5 states. [2020-10-28 19:20:54,953 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:20:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:20:56,925 INFO L93 Difference]: Finished difference Result 10093 states and 15534 transitions. [2020-10-28 19:20:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:20:56,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2020-10-28 19:20:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:20:56,954 INFO L225 Difference]: With dead ends: 10093 [2020-10-28 19:20:56,954 INFO L226 Difference]: Without dead ends: 5470 [2020-10-28 19:20:56,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:20:56,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2020-10-28 19:20:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 4793. [2020-10-28 19:20:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4793 states. [2020-10-28 19:20:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4793 states to 4793 states and 7387 transitions. [2020-10-28 19:20:57,310 INFO L78 Accepts]: Start accepts. Automaton has 4793 states and 7387 transitions. Word has length 259 [2020-10-28 19:20:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:20:57,311 INFO L481 AbstractCegarLoop]: Abstraction has 4793 states and 7387 transitions. [2020-10-28 19:20:57,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:20:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4793 states and 7387 transitions. [2020-10-28 19:20:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-28 19:20:57,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:57,324 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] [2020-10-28 19:20:57,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:20:57,325 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:57,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1198603229, now seen corresponding path program 1 times [2020-10-28 19:20:57,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:57,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952215939] [2020-10-28 19:20:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:57,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:58,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:58,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:59,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:00,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:02,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:02,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-28 19:21:02,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:21:02,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 19:21:02,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:02,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:02,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:02,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:02,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-28 19:21:02,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:03,259 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:21:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:03,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:03,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:03,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:03,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:21:03,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:03,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:03,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:03,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:03,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:03,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:03,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952215939] [2020-10-28 19:21:03,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:03,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:03,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698426399] [2020-10-28 19:21:03,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:03,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:03,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:03,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:03,442 INFO L87 Difference]: Start difference. First operand 4793 states and 7387 transitions. Second operand 5 states. [2020-10-28 19:21:08,920 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:21:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:11,072 INFO L93 Difference]: Finished difference Result 13846 states and 21243 transitions. [2020-10-28 19:21:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:21:11,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-10-28 19:21:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:11,114 INFO L225 Difference]: With dead ends: 13846 [2020-10-28 19:21:11,114 INFO L226 Difference]: Without dead ends: 9363 [2020-10-28 19:21:11,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:21:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9363 states. [2020-10-28 19:21:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9363 to 9360. [2020-10-28 19:21:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9360 states. [2020-10-28 19:21:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9360 states to 9360 states and 14323 transitions. [2020-10-28 19:21:11,840 INFO L78 Accepts]: Start accepts. Automaton has 9360 states and 14323 transitions. Word has length 261 [2020-10-28 19:21:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:11,841 INFO L481 AbstractCegarLoop]: Abstraction has 9360 states and 14323 transitions. [2020-10-28 19:21:11,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:21:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9360 states and 14323 transitions. [2020-10-28 19:21:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-28 19:21:11,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:11,865 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] [2020-10-28 19:21:11,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:21:11,866 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash -702120898, now seen corresponding path program 1 times [2020-10-28 19:21:11,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:11,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983352905] [2020-10-28 19:21:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:11,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:11,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:12,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:13,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:14,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:16,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:16,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-28 19:21:16,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:21:16,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 19:21:16,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:16,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:16,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:16,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:16,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 19:21:16,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:17,777 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:21:17,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:17,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:17,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:17,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:17,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:21:17,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:17,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:17,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983352905] [2020-10-28 19:21:17,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:17,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:17,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728961488] [2020-10-28 19:21:17,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:17,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:17,902 INFO L87 Difference]: Start difference. First operand 9360 states and 14323 transitions. Second operand 5 states. [2020-10-28 19:21:23,155 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:21:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:25,342 INFO L93 Difference]: Finished difference Result 27219 states and 41494 transitions. [2020-10-28 19:21:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:21:25,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 263 [2020-10-28 19:21:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:25,400 INFO L225 Difference]: With dead ends: 27219 [2020-10-28 19:21:25,400 INFO L226 Difference]: Without dead ends: 18280 [2020-10-28 19:21:25,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:21:25,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18280 states. [2020-10-28 19:21:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18280 to 18277. [2020-10-28 19:21:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18277 states. [2020-10-28 19:21:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18277 states to 18277 states and 27718 transitions. [2020-10-28 19:21:26,420 INFO L78 Accepts]: Start accepts. Automaton has 18277 states and 27718 transitions. Word has length 263 [2020-10-28 19:21:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:26,421 INFO L481 AbstractCegarLoop]: Abstraction has 18277 states and 27718 transitions. [2020-10-28 19:21:26,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:21:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18277 states and 27718 transitions. [2020-10-28 19:21:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-28 19:21:26,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:26,461 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] [2020-10-28 19:21:26,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:21:26,461 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:26,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:26,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2033222324, now seen corresponding path program 1 times [2020-10-28 19:21:26,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:26,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95192718] [2020-10-28 19:21:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:26,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:26,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:26,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:26,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:26,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:26,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:26,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:26,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:26,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:28,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:28,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:31,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:31,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-28 19:21:31,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:21:31,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 19:21:31,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:31,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-28 19:21:31,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:32,350 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:21:32,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:32,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:32,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:32,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:32,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:32,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:21:32,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:32,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:32,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:32,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95192718] [2020-10-28 19:21:32,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:32,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:32,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754861165] [2020-10-28 19:21:32,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:32,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:32,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:32,502 INFO L87 Difference]: Start difference. First operand 18277 states and 27718 transitions. Second operand 5 states. [2020-10-28 19:21:39,181 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:21:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:41,962 INFO L93 Difference]: Finished difference Result 52210 states and 78664 transitions. [2020-10-28 19:21:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:21:41,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2020-10-28 19:21:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:42,045 INFO L225 Difference]: With dead ends: 52210 [2020-10-28 19:21:42,045 INFO L226 Difference]: Without dead ends: 35607 [2020-10-28 19:21:42,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:21:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35607 states. [2020-10-28 19:21:44,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35607 to 35604. [2020-10-28 19:21:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35604 states. [2020-10-28 19:21:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35604 states to 35604 states and 53556 transitions. [2020-10-28 19:21:44,394 INFO L78 Accepts]: Start accepts. Automaton has 35604 states and 53556 transitions. Word has length 265 [2020-10-28 19:21:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:44,395 INFO L481 AbstractCegarLoop]: Abstraction has 35604 states and 53556 transitions. [2020-10-28 19:21:44,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:21:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 35604 states and 53556 transitions. [2020-10-28 19:21:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-28 19:21:44,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:44,444 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] [2020-10-28 19:21:44,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:21:44,445 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:44,445 INFO L82 PathProgramCache]: Analyzing trace with hash -890787626, now seen corresponding path program 1 times [2020-10-28 19:21:44,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:44,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075630734] [2020-10-28 19:21:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:44,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:44,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:45,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:45,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:45,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:49,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:49,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:49,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:49,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:49,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:49,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 19:21:49,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 19:21:49,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:21:49,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:49,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 19:21:49,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:50,384 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:21:50,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:50,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:50,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:50,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:50,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:50,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:21:50,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:50,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:50,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:50,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:50,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:50,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:50,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075630734] [2020-10-28 19:21:50,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:50,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:50,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090273068] [2020-10-28 19:21:50,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:50,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:50,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:50,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:50,505 INFO L87 Difference]: Start difference. First operand 35604 states and 53556 transitions. Second operand 5 states. [2020-10-28 19:21:58,235 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:22:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:01,490 INFO L93 Difference]: Finished difference Result 103818 states and 155612 transitions. [2020-10-28 19:22:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:01,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 267 [2020-10-28 19:22:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:01,596 INFO L225 Difference]: With dead ends: 103818 [2020-10-28 19:22:01,596 INFO L226 Difference]: Without dead ends: 69203 [2020-10-28 19:22:01,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69203 states. [2020-10-28 19:22:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69203 to 69200. [2020-10-28 19:22:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69200 states. [2020-10-28 19:22:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69200 states to 69200 states and 103024 transitions. [2020-10-28 19:22:06,634 INFO L78 Accepts]: Start accepts. Automaton has 69200 states and 103024 transitions. Word has length 267 [2020-10-28 19:22:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:06,635 INFO L481 AbstractCegarLoop]: Abstraction has 69200 states and 103024 transitions. [2020-10-28 19:22:06,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 69200 states and 103024 transitions. [2020-10-28 19:22:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-28 19:22:06,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:06,709 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] [2020-10-28 19:22:06,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:22:06,709 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1168245672, now seen corresponding path program 1 times [2020-10-28 19:22:06,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:06,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014693384] [2020-10-28 19:22:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:06,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:07,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:09,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:11,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:11,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-28 19:22:11,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:22:11,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:22:11,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:11,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 19:22:11,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:12,570 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:22:12,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:12,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:12,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:12,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:12,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:12,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:22:12,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:12,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:12,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:12,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:12,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:12,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:12,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014693384] [2020-10-28 19:22:12,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:12,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:12,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815430168] [2020-10-28 19:22:12,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:12,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:12,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:12,693 INFO L87 Difference]: Start difference. First operand 69200 states and 103024 transitions. Second operand 5 states. [2020-10-28 19:22:24,663 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:22:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:29,782 INFO L93 Difference]: Finished difference Result 203475 states and 302223 transitions. [2020-10-28 19:22:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:29,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 269 [2020-10-28 19:22:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:30,218 INFO L225 Difference]: With dead ends: 203475 [2020-10-28 19:22:30,218 INFO L226 Difference]: Without dead ends: 135093 [2020-10-28 19:22:30,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135093 states. [2020-10-28 19:22:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135093 to 135090. [2020-10-28 19:22:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135090 states. [2020-10-28 19:22:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135090 states to 135090 states and 199340 transitions. [2020-10-28 19:22:40,521 INFO L78 Accepts]: Start accepts. Automaton has 135090 states and 199340 transitions. Word has length 269 [2020-10-28 19:22:40,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:40,521 INFO L481 AbstractCegarLoop]: Abstraction has 135090 states and 199340 transitions. [2020-10-28 19:22:40,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:40,522 INFO L276 IsEmpty]: Start isEmpty. Operand 135090 states and 199340 transitions. [2020-10-28 19:22:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-28 19:22:40,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:40,686 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] [2020-10-28 19:22:40,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:22:40,687 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:40,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1798972705, now seen corresponding path program 1 times [2020-10-28 19:22:40,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:40,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802916198] [2020-10-28 19:22:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:40,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:45,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:45,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-28 19:22:45,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:22:45,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 19:22:45,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:45,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:45,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:45,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:45,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-28 19:22:45,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:46,549 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 19:22:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:46,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:46,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:46,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:46,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:46,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:22:46,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:46,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:46,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:46,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:46,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:46,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802916198] [2020-10-28 19:22:46,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:46,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:46,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105912787] [2020-10-28 19:22:46,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:46,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:46,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:46,740 INFO L87 Difference]: Start difference. First operand 135090 states and 199340 transitions. Second operand 5 states. [2020-10-28 19:23:05,278 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:23:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:13,356 INFO L93 Difference]: Finished difference Result 393089 states and 577823 transitions. [2020-10-28 19:23:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:23:13,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 271 [2020-10-28 19:23:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:14,042 INFO L225 Difference]: With dead ends: 393089 [2020-10-28 19:23:14,042 INFO L226 Difference]: Without dead ends: 262334 [2020-10-28 19:23:14,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:23:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262334 states.