/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.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:12:29,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:12:29,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:12:29,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:12:29,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:12:29,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:12:29,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:12:29,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:12:29,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:12:29,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:12:29,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:12:29,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:12:29,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:12:29,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:12:30,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:12:30,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:12:30,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:12:30,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:12:30,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:12:30,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:12:30,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:12:30,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:12:30,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:12:30,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:12:30,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:12:30,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:12:30,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:12:30,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:12:30,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:12:30,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:12:30,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:12:30,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:12:30,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:12:30,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:12:30,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:12:30,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:12:30,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:12:30,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:12:30,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:12:30,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:12:30,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:12:30,077 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 19:12:30,106 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:12:30,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:12:30,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:12:30,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:12:30,108 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:12:30,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:12:30,109 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:12:30,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:12:30,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:12:30,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:12:30,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:12:30,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:12:30,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:12:30,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:12:30,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:12:30,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:12:30,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:12:30,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:12:30,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:12:30,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:12:30,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:12:30,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:12:30,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:12:30,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:12:30,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:12:30,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:12:30,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:12:30,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:12:30,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:12:30,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:12:30,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:12:30,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:12:30,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:12:30,553 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:12:30,558 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:12:30,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 19:12:30,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c706e02e/d59ebdbc8c1b4b2e88315cf064e35e99/FLAG326cd5d1e [2020-10-28 19:12:31,247 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:12:31,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 19:12:31,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c706e02e/d59ebdbc8c1b4b2e88315cf064e35e99/FLAG326cd5d1e [2020-10-28 19:12:31,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c706e02e/d59ebdbc8c1b4b2e88315cf064e35e99 [2020-10-28 19:12:31,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:12:31,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:12:31,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:12:31,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:12:31,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:12:31,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:12:31" (1/1) ... [2020-10-28 19:12:31,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4a2634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:31, skipping insertion in model container [2020-10-28 19:12:31,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:12:31" (1/1) ... [2020-10-28 19:12:31,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:12:31,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:12:32,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:12:32,167 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:12:32,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:12:32,337 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:12:32,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32 WrapperNode [2020-10-28 19:12:32,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:12:32,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:12:32,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:12:32,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:12:32,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32" (1/1) ... [2020-10-28 19:12:32,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32" (1/1) ... [2020-10-28 19:12:32,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32" (1/1) ... [2020-10-28 19:12:32,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32" (1/1) ... [2020-10-28 19:12:32,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32" (1/1) ... [2020-10-28 19:12:32,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32" (1/1) ... [2020-10-28 19:12:32,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32" (1/1) ... [2020-10-28 19:12:32,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:12:32,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:12:32,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:12:32,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:12:32,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32" (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 19:12:32,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:12:32,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:12:32,521 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:12:32,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:12:32,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:12:32,521 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:12:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:12:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:12:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:12:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:12:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:12:32,523 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:12:32,523 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:12:32,523 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:12:32,523 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:12:32,523 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:12:32,524 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:12:32,524 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:12:32,524 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:12:32,524 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:12:32,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:12:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:12:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:12:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:12:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:12:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:12:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:12:33,687 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:12:33,687 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:12:33,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:12:33 BoogieIcfgContainer [2020-10-28 19:12:33,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:12:33,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:12:33,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:12:33,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:12:33,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:12:31" (1/3) ... [2020-10-28 19:12:33,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da0b107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:12:33, skipping insertion in model container [2020-10-28 19:12:33,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:12:32" (2/3) ... [2020-10-28 19:12:33,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da0b107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:12:33, skipping insertion in model container [2020-10-28 19:12:33,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:12:33" (3/3) ... [2020-10-28 19:12:33,699 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 19:12:33,710 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:12:33,715 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:12:33,729 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:12:33,756 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:12:33,756 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:12:33,756 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:12:33,757 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:12:33,757 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:12:33,757 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:12:33,757 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:12:33,758 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:12:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-28 19:12:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 19:12:33,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:12:33,790 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] [2020-10-28 19:12:33,791 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:12:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:12:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1233459878, now seen corresponding path program 1 times [2020-10-28 19:12:33,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:12:33,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895119678] [2020-10-28 19:12:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:12:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:34,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:34,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:35,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:37,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:37,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 19:12:37,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:12:37,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2999 [2020-10-28 19:12:37,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:37,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:37,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:12:37,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 19:12:37,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 19:12:37,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:12:37,745 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:12:37,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:12:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:37,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:37,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:37,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:12:37,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:12:37,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:12:37,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:37,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:37,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:12:37,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:12:37,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:12:37,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:12:37,841 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 19:12:37,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895119678] [2020-10-28 19:12:37,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:12:37,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:12:37,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996196525] [2020-10-28 19:12:37,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:12:37,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:12:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:12:37,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:12:37,880 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2020-10-28 19:12:38,358 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:12:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:12:39,270 INFO L93 Difference]: Finished difference Result 338 states and 566 transitions. [2020-10-28 19:12:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:12:39,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 19:12:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:12:39,285 INFO L225 Difference]: With dead ends: 338 [2020-10-28 19:12:39,285 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 19:12:39,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:12:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 19:12:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2020-10-28 19:12:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 19:12:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 362 transitions. [2020-10-28 19:12:39,360 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 362 transitions. Word has length 67 [2020-10-28 19:12:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:12:39,361 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 362 transitions. [2020-10-28 19:12:39,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:12:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 362 transitions. [2020-10-28 19:12:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:12:39,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:12:39,365 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] [2020-10-28 19:12:39,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:12:39,366 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:12:39,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:12:39,367 INFO L82 PathProgramCache]: Analyzing trace with hash 309649509, now seen corresponding path program 1 times [2020-10-28 19:12:39,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:12:39,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590476756] [2020-10-28 19:12:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:12:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:39,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:39,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:41,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:44,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:44,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:12:44,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:12:44,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:12:44,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:44,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:44,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:12:44,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:12:44,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:12:44,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 19:12:45,025 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:12:45,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:12:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:45,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:45,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:45,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:12:45,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:12:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:12:45,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:45,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:45,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:12:45,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:12:45,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:12:45,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:12:45,112 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 19:12:45,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590476756] [2020-10-28 19:12:45,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:12:45,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:12:45,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392408166] [2020-10-28 19:12:45,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:12:45,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:12:45,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:12:45,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:12:45,123 INFO L87 Difference]: Start difference. First operand 230 states and 362 transitions. Second operand 5 states. [2020-10-28 19:12:46,633 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:12:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:12:46,740 INFO L93 Difference]: Finished difference Result 607 states and 973 transitions. [2020-10-28 19:12:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:12:46,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 19:12:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:12:46,746 INFO L225 Difference]: With dead ends: 607 [2020-10-28 19:12:46,747 INFO L226 Difference]: Without dead ends: 438 [2020-10-28 19:12:46,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:12:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-28 19:12:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 435. [2020-10-28 19:12:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-28 19:12:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 684 transitions. [2020-10-28 19:12:46,834 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 684 transitions. Word has length 69 [2020-10-28 19:12:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:12:46,835 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 684 transitions. [2020-10-28 19:12:46,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:12:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 684 transitions. [2020-10-28 19:12:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:12:46,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:12:46,839 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] [2020-10-28 19:12:46,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:12:46,840 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:12:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:12:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1227978955, now seen corresponding path program 1 times [2020-10-28 19:12:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:12:46,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649145816] [2020-10-28 19:12:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:12:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:46,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:46,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:47,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:47,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:51,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:51,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:12:51,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:12:51,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4512 [2020-10-28 19:12:51,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:51,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:51,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:12:51,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:12:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:12:51,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:12:51,837 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:12:51,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:12:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:51,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:51,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:51,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:12:51,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:12:51,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 19:12:51,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:51,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:51,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:12:51,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:12:51,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:12:51,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:12:51,912 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 19:12:51,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649145816] [2020-10-28 19:12:51,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:12:51,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:12:51,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151097409] [2020-10-28 19:12:51,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:12:51,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:12:51,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:12:51,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:12:51,918 INFO L87 Difference]: Start difference. First operand 435 states and 684 transitions. Second operand 5 states. [2020-10-28 19:12:53,245 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:12:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:12:53,387 INFO L93 Difference]: Finished difference Result 1142 states and 1824 transitions. [2020-10-28 19:12:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:12:53,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 19:12:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:12:53,397 INFO L225 Difference]: With dead ends: 1142 [2020-10-28 19:12:53,397 INFO L226 Difference]: Without dead ends: 819 [2020-10-28 19:12:53,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:12:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-10-28 19:12:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 816. [2020-10-28 19:12:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-10-28 19:12:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1274 transitions. [2020-10-28 19:12:53,544 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1274 transitions. Word has length 70 [2020-10-28 19:12:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:12:53,547 INFO L481 AbstractCegarLoop]: Abstraction has 816 states and 1274 transitions. [2020-10-28 19:12:53,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:12:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1274 transitions. [2020-10-28 19:12:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:12:53,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:12:53,564 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] [2020-10-28 19:12:53,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:12:53,565 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:12:53,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:12:53,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2019754633, now seen corresponding path program 1 times [2020-10-28 19:12:53,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:12:53,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437725631] [2020-10-28 19:12:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:12:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:53,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:53,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:53,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:53,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:54,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:55,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:58,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:58,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:12:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:12:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:12:58,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:58,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:12:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:12:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:12:58,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:12:59,155 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:12:59,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:12:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:59,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:59,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:59,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:12:59,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:12:59,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:12:59,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:59,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:12:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:12:59,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:12:59,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:12:59,220 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 19:12:59,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437725631] [2020-10-28 19:12:59,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:12:59,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:12:59,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801207151] [2020-10-28 19:12:59,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:12:59,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:12:59,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:12:59,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:12:59,223 INFO L87 Difference]: Start difference. First operand 816 states and 1274 transitions. Second operand 5 states. [2020-10-28 19:13:00,533 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:13:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:00,752 INFO L93 Difference]: Finished difference Result 2333 states and 3632 transitions. [2020-10-28 19:13:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:13:00,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 19:13:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:00,763 INFO L225 Difference]: With dead ends: 2333 [2020-10-28 19:13:00,764 INFO L226 Difference]: Without dead ends: 1546 [2020-10-28 19:13:00,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:13:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-10-28 19:13:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1543. [2020-10-28 19:13:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-28 19:13:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2384 transitions. [2020-10-28 19:13:00,945 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2384 transitions. Word has length 70 [2020-10-28 19:13:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:00,950 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2384 transitions. [2020-10-28 19:13:00,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:13:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2384 transitions. [2020-10-28 19:13:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:13:00,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:00,955 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] [2020-10-28 19:13:00,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:13:00,956 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash 213130055, now seen corresponding path program 1 times [2020-10-28 19:13:00,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:00,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518643081] [2020-10-28 19:13:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:01,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:01,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:01,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:01,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:03,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:05,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:05,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:13:05,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:13:05,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:13:05,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:05,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:13:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:13:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:13:05,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:06,586 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:13:06,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:06,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:06,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:06,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:06,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:13:06,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:06,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:06,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:06,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:06,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:06,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:13:06,668 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 19:13:06,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518643081] [2020-10-28 19:13:06,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:06,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:13:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407580877] [2020-10-28 19:13:06,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:13:06,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:06,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:13:06,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:06,672 INFO L87 Difference]: Start difference. First operand 1543 states and 2384 transitions. Second operand 5 states. [2020-10-28 19:13:08,110 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:13:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:08,343 INFO L93 Difference]: Finished difference Result 4298 states and 6701 transitions. [2020-10-28 19:13:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:13:08,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-28 19:13:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:08,360 INFO L225 Difference]: With dead ends: 4298 [2020-10-28 19:13:08,360 INFO L226 Difference]: Without dead ends: 2958 [2020-10-28 19:13:08,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:13:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2020-10-28 19:13:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2955. [2020-10-28 19:13:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2955 states. [2020-10-28 19:13:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4535 transitions. [2020-10-28 19:13:08,648 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4535 transitions. Word has length 71 [2020-10-28 19:13:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:08,649 INFO L481 AbstractCegarLoop]: Abstraction has 2955 states and 4535 transitions. [2020-10-28 19:13:08,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:13:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4535 transitions. [2020-10-28 19:13:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:13:08,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:08,656 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] [2020-10-28 19:13:08,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:13:08,657 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1131152968, now seen corresponding path program 1 times [2020-10-28 19:13:08,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:08,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277835224] [2020-10-28 19:13:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:08,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:08,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:08,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:08,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:09,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:10,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:10,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:13:10,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:13:10,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1614 [2020-10-28 19:13:10,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:10,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:10,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:13:10,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 19:13:10,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:13:10,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:10,677 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:13:10,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:10,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:10,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:10,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:10,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:10,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:13:10,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:10,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:10,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:10,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:10,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:10,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:10,716 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 19:13:10,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277835224] [2020-10-28 19:13:10,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:10,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:13:10,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540618756] [2020-10-28 19:13:10,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:13:10,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:10,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:13:10,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:13:10,719 INFO L87 Difference]: Start difference. First operand 2955 states and 4535 transitions. Second operand 4 states. [2020-10-28 19:13:11,068 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:13:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:12,227 INFO L93 Difference]: Finished difference Result 7297 states and 11691 transitions. [2020-10-28 19:13:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:13:12,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 19:13:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:12,254 INFO L225 Difference]: With dead ends: 7297 [2020-10-28 19:13:12,254 INFO L226 Difference]: Without dead ends: 5006 [2020-10-28 19:13:12,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2020-10-28 19:13:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 5003. [2020-10-28 19:13:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5003 states. [2020-10-28 19:13:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5003 states to 5003 states and 7879 transitions. [2020-10-28 19:13:12,719 INFO L78 Accepts]: Start accepts. Automaton has 5003 states and 7879 transitions. Word has length 71 [2020-10-28 19:13:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:12,719 INFO L481 AbstractCegarLoop]: Abstraction has 5003 states and 7879 transitions. [2020-10-28 19:13:12,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:13:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5003 states and 7879 transitions. [2020-10-28 19:13:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:13:12,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:12,727 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] [2020-10-28 19:13:12,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:13:12,727 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash 175148071, now seen corresponding path program 1 times [2020-10-28 19:13:12,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:12,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545848095] [2020-10-28 19:13:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:12,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:12,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:12,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:13,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:13,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:13,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:13,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:15,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:15,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:13:15,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:13:15,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3225 [2020-10-28 19:13:15,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:15,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:15,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:13:15,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:13:15,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 19:13:15,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:16,412 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:13:16,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:16,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:16,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:16,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:16,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:16,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:13:16,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:16,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:16,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:16,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:16,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:16,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:16,460 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 19:13:16,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545848095] [2020-10-28 19:13:16,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:16,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:13:16,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110095506] [2020-10-28 19:13:16,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:13:16,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:16,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:13:16,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:16,463 INFO L87 Difference]: Start difference. First operand 5003 states and 7879 transitions. Second operand 5 states. [2020-10-28 19:13:18,214 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:13:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:18,634 INFO L93 Difference]: Finished difference Result 14171 states and 22429 transitions. [2020-10-28 19:13:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:13:18,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:13:18,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:18,680 INFO L225 Difference]: With dead ends: 14171 [2020-10-28 19:13:18,680 INFO L226 Difference]: Without dead ends: 9560 [2020-10-28 19:13:18,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:13:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9560 states. [2020-10-28 19:13:19,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9560 to 9557. [2020-10-28 19:13:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9557 states. [2020-10-28 19:13:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9557 states to 9557 states and 14889 transitions. [2020-10-28 19:13:19,733 INFO L78 Accepts]: Start accepts. Automaton has 9557 states and 14889 transitions. Word has length 74 [2020-10-28 19:13:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:19,734 INFO L481 AbstractCegarLoop]: Abstraction has 9557 states and 14889 transitions. [2020-10-28 19:13:19,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:13:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 9557 states and 14889 transitions. [2020-10-28 19:13:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:13:19,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:19,746 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] [2020-10-28 19:13:19,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:13:19,746 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:19,747 INFO L82 PathProgramCache]: Analyzing trace with hash -433399397, now seen corresponding path program 1 times [2020-10-28 19:13:19,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:19,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844753283] [2020-10-28 19:13:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:19,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:19,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:19,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:20,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:20,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:22,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:24,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:24,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:13:24,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:13:24,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 19:13:24,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:24,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:13:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:13:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:13:24,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:25,327 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:13:25,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:25,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:25,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:25,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:25,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:25,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:13:25,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:25,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:25,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:25,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:25,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:25,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:25,383 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 19:13:25,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844753283] [2020-10-28 19:13:25,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:25,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:13:25,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619884200] [2020-10-28 19:13:25,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:13:25,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:25,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:13:25,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:25,394 INFO L87 Difference]: Start difference. First operand 9557 states and 14889 transitions. Second operand 5 states. [2020-10-28 19:13:25,797 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:13:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:28,022 INFO L93 Difference]: Finished difference Result 16969 states and 26466 transitions. [2020-10-28 19:13:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:13:28,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:13:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:28,068 INFO L225 Difference]: With dead ends: 16969 [2020-10-28 19:13:28,068 INFO L226 Difference]: Without dead ends: 12414 [2020-10-28 19:13:28,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:13:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12414 states. [2020-10-28 19:13:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12414 to 12411. [2020-10-28 19:13:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12411 states. [2020-10-28 19:13:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12411 states to 12411 states and 18966 transitions. [2020-10-28 19:13:29,180 INFO L78 Accepts]: Start accepts. Automaton has 12411 states and 18966 transitions. Word has length 74 [2020-10-28 19:13:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:29,180 INFO L481 AbstractCegarLoop]: Abstraction has 12411 states and 18966 transitions. [2020-10-28 19:13:29,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:13:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 12411 states and 18966 transitions. [2020-10-28 19:13:29,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:13:29,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:29,199 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] [2020-10-28 19:13:29,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:13:29,199 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:29,200 INFO L82 PathProgramCache]: Analyzing trace with hash 494135313, now seen corresponding path program 1 times [2020-10-28 19:13:29,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:29,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637413136] [2020-10-28 19:13:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:29,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:29,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:29,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:29,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:32,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:34,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:34,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:13:34,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:13:34,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:13:34,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:34,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:34,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:13:34,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:13:34,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 19:13:34,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:34,708 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:13:34,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:34,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:34,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:34,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:34,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:34,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:13:34,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:34,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:34,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:34,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:34,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:34,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:34,753 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 19:13:34,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637413136] [2020-10-28 19:13:34,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:34,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:13:34,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951569388] [2020-10-28 19:13:34,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:13:34,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:34,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:13:34,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:34,756 INFO L87 Difference]: Start difference. First operand 12411 states and 18966 transitions. Second operand 5 states. [2020-10-28 19:13:36,730 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:13:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:37,979 INFO L93 Difference]: Finished difference Result 35870 states and 54801 transitions. [2020-10-28 19:13:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:13:37,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:13:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:38,047 INFO L225 Difference]: With dead ends: 35870 [2020-10-28 19:13:38,047 INFO L226 Difference]: Without dead ends: 23813 [2020-10-28 19:13:38,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:13:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23813 states. [2020-10-28 19:13:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23813 to 23810. [2020-10-28 19:13:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23810 states. [2020-10-28 19:13:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23810 states to 23810 states and 35983 transitions. [2020-10-28 19:13:40,150 INFO L78 Accepts]: Start accepts. Automaton has 23810 states and 35983 transitions. Word has length 74 [2020-10-28 19:13:40,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:40,150 INFO L481 AbstractCegarLoop]: Abstraction has 23810 states and 35983 transitions. [2020-10-28 19:13:40,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:13:40,150 INFO L276 IsEmpty]: Start isEmpty. Operand 23810 states and 35983 transitions. [2020-10-28 19:13:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 19:13:40,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:40,173 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] [2020-10-28 19:13:40,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:13:40,173 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:40,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:40,174 INFO L82 PathProgramCache]: Analyzing trace with hash 677298846, now seen corresponding path program 1 times [2020-10-28 19:13:40,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:40,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197710718] [2020-10-28 19:13:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:40,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:40,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:40,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:40,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:40,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:40,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:45,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:45,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 19:13:45,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:13:45,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 19:13:45,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:45,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:13:45,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:13:45,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 19:13:45,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:13:45,560 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:13:45,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:45,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:45,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:45,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:45,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:45,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:13:45,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:45,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:45,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:45,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:45,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:45,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:45,595 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 19:13:45,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197710718] [2020-10-28 19:13:45,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:45,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:13:45,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886140034] [2020-10-28 19:13:45,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:13:45,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:45,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:13:45,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:13:45,597 INFO L87 Difference]: Start difference. First operand 23810 states and 35983 transitions. Second operand 4 states. [2020-10-28 19:13:45,971 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:13:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:49,478 INFO L93 Difference]: Finished difference Result 57160 states and 88979 transitions. [2020-10-28 19:13:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:13:49,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-28 19:13:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:49,573 INFO L225 Difference]: With dead ends: 57160 [2020-10-28 19:13:49,574 INFO L226 Difference]: Without dead ends: 37253 [2020-10-28 19:13:49,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37253 states. [2020-10-28 19:13:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37253 to 37250. [2020-10-28 19:13:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37250 states. [2020-10-28 19:13:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37250 states to 37250 states and 55727 transitions. [2020-10-28 19:13:53,014 INFO L78 Accepts]: Start accepts. Automaton has 37250 states and 55727 transitions. Word has length 75 [2020-10-28 19:13:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:53,015 INFO L481 AbstractCegarLoop]: Abstraction has 37250 states and 55727 transitions. [2020-10-28 19:13:53,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:13:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 37250 states and 55727 transitions. [2020-10-28 19:13:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:13:53,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:53,047 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] [2020-10-28 19:13:53,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:13:53,047 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:53,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1811444415, now seen corresponding path program 1 times [2020-10-28 19:13:53,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:53,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372826859] [2020-10-28 19:13:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:54,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:58,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:58,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:13:58,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:13:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 19:13:58,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:58,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:13:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:13:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 19:13:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:58,468 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:13:58,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:58,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:58,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:58,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:58,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:58,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:13:58,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:58,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:58,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:58,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:58,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:58,512 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 19:13:58,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372826859] [2020-10-28 19:13:58,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:58,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:13:58,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982327425] [2020-10-28 19:13:58,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:13:58,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:58,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:13:58,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:58,514 INFO L87 Difference]: Start difference. First operand 37250 states and 55727 transitions. Second operand 5 states. [2020-10-28 19:13:58,900 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:14:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:03,235 INFO L93 Difference]: Finished difference Result 61048 states and 91271 transitions. [2020-10-28 19:14:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:03,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:14:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:03,333 INFO L225 Difference]: With dead ends: 61048 [2020-10-28 19:14:03,334 INFO L226 Difference]: Without dead ends: 41829 [2020-10-28 19:14:03,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:14:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41829 states. [2020-10-28 19:14:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41829 to 41826. [2020-10-28 19:14:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41826 states. [2020-10-28 19:14:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41826 states to 41826 states and 61731 transitions. [2020-10-28 19:14:07,279 INFO L78 Accepts]: Start accepts. Automaton has 41826 states and 61731 transitions. Word has length 78 [2020-10-28 19:14:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:07,280 INFO L481 AbstractCegarLoop]: Abstraction has 41826 states and 61731 transitions. [2020-10-28 19:14:07,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 41826 states and 61731 transitions. [2020-10-28 19:14:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:14:07,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:07,306 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] [2020-10-28 19:14:07,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:14:07,306 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:07,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1303410491, now seen corresponding path program 1 times [2020-10-28 19:14:07,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:07,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048887837] [2020-10-28 19:14:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:07,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:07,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:07,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:07,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:11,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:12,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:12,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:14:12,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:14:12,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:14:12,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:12,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:12,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:12,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 19:14:12,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 19:14:12,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:12,721 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:12,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:12,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:12,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:12,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:12,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:12,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:14:12,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:12,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:12,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:14:12,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048887837] [2020-10-28 19:14:12,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:12,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:12,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013160518] [2020-10-28 19:14:12,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:12,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:12,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:12,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:12,751 INFO L87 Difference]: Start difference. First operand 41826 states and 61731 transitions. Second operand 5 states. [2020-10-28 19:14:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:16,068 INFO L93 Difference]: Finished difference Result 67864 states and 100292 transitions. [2020-10-28 19:14:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:14:16,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:14:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:16,100 INFO L225 Difference]: With dead ends: 67864 [2020-10-28 19:14:16,100 INFO L226 Difference]: Without dead ends: 26677 [2020-10-28 19:14:16,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:14:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2020-10-28 19:14:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26677. [2020-10-28 19:14:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26677 states. [2020-10-28 19:14:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26677 states to 26677 states and 39325 transitions. [2020-10-28 19:14:18,796 INFO L78 Accepts]: Start accepts. Automaton has 26677 states and 39325 transitions. Word has length 78 [2020-10-28 19:14:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:18,797 INFO L481 AbstractCegarLoop]: Abstraction has 26677 states and 39325 transitions. [2020-10-28 19:14:18,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 26677 states and 39325 transitions. [2020-10-28 19:14:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:14:18,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:18,815 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] [2020-10-28 19:14:18,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:14:18,816 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:18,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1127866419, now seen corresponding path program 1 times [2020-10-28 19:14:18,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:18,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028840237] [2020-10-28 19:14:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:18,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:18,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:18,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:20,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:23,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:23,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:14:23,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:14:23,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 19:14:23,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:23,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 19:14:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:24,289 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:24,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:24,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:24,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:24,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:24,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:24,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:14:24,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:24,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:24,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:24,331 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 19:14:24,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028840237] [2020-10-28 19:14:24,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:24,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:24,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399846659] [2020-10-28 19:14:24,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:24,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:24,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:24,334 INFO L87 Difference]: Start difference. First operand 26677 states and 39325 transitions. Second operand 5 states. [2020-10-28 19:14:24,767 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:14:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:28,704 INFO L93 Difference]: Finished difference Result 46704 states and 68937 transitions. [2020-10-28 19:14:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:28,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:14:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:28,740 INFO L225 Difference]: With dead ends: 46704 [2020-10-28 19:14:28,740 INFO L226 Difference]: Without dead ends: 30631 [2020-10-28 19:14:28,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:14:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30631 states. [2020-10-28 19:14:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30631 to 30628. [2020-10-28 19:14:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30628 states. [2020-10-28 19:14:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30628 states to 30628 states and 44447 transitions. [2020-10-28 19:14:31,748 INFO L78 Accepts]: Start accepts. Automaton has 30628 states and 44447 transitions. Word has length 78 [2020-10-28 19:14:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:31,748 INFO L481 AbstractCegarLoop]: Abstraction has 30628 states and 44447 transitions. [2020-10-28 19:14:31,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30628 states and 44447 transitions. [2020-10-28 19:14:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:14:31,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:31,763 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] [2020-10-28 19:14:31,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:14:31,764 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:31,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:31,764 INFO L82 PathProgramCache]: Analyzing trace with hash 545851375, now seen corresponding path program 1 times [2020-10-28 19:14:31,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:31,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087253823] [2020-10-28 19:14:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:31,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:31,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:31,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:31,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:31,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:32,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:36,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:36,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:14:36,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:14:36,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 19:14:36,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:36,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:36,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:36,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 19:14:36,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:14:36,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:37,264 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:37,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:37,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:37,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:37,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:37,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:37,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:14:37,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:37,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:37,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:37,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:37,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:37,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:37,302 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 19:14:37,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087253823] [2020-10-28 19:14:37,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:37,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:37,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638465050] [2020-10-28 19:14:37,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:37,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:37,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:37,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:37,304 INFO L87 Difference]: Start difference. First operand 30628 states and 44447 transitions. Second operand 5 states. [2020-10-28 19:14:37,683 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:14:40,043 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:14:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:43,040 INFO L93 Difference]: Finished difference Result 56649 states and 84805 transitions. [2020-10-28 19:14:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:14:43,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:14:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:43,096 INFO L225 Difference]: With dead ends: 56649 [2020-10-28 19:14:43,096 INFO L226 Difference]: Without dead ends: 43094 [2020-10-28 19:14:43,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43094 states. [2020-10-28 19:14:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43094 to 43088. [2020-10-28 19:14:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43088 states. [2020-10-28 19:14:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43088 states to 43088 states and 62423 transitions. [2020-10-28 19:14:47,419 INFO L78 Accepts]: Start accepts. Automaton has 43088 states and 62423 transitions. Word has length 78 [2020-10-28 19:14:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:47,419 INFO L481 AbstractCegarLoop]: Abstraction has 43088 states and 62423 transitions. [2020-10-28 19:14:47,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 43088 states and 62423 transitions. [2020-10-28 19:14:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:14:47,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:47,435 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] [2020-10-28 19:14:47,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:14:47,435 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1971846904, now seen corresponding path program 1 times [2020-10-28 19:14:47,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:47,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258493578] [2020-10-28 19:14:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:47,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:47,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:47,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:47,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:48,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:52,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:52,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:14:52,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:14:52,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 19:14:52,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:52,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:52,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:14:52,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 19:14:52,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 19:14:52,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:52,846 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:52,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:52,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:52,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:52,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:52,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:52,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:14:52,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:52,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:52,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:52,880 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 19:14:52,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258493578] [2020-10-28 19:14:52,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:52,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:14:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298896819] [2020-10-28 19:14:52,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:14:52,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:14:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:14:52,882 INFO L87 Difference]: Start difference. First operand 43088 states and 62423 transitions. Second operand 4 states. [2020-10-28 19:14:55,015 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:14:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:59,367 INFO L93 Difference]: Finished difference Result 81628 states and 120265 transitions. [2020-10-28 19:14:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:14:59,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 19:14:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:59,443 INFO L225 Difference]: With dead ends: 81628 [2020-10-28 19:14:59,443 INFO L226 Difference]: Without dead ends: 54609 [2020-10-28 19:14:59,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54609 states. [2020-10-28 19:15:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54609 to 53280. [2020-10-28 19:15:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53280 states. [2020-10-28 19:15:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53280 states to 53280 states and 77215 transitions. [2020-10-28 19:15:04,939 INFO L78 Accepts]: Start accepts. Automaton has 53280 states and 77215 transitions. Word has length 79 [2020-10-28 19:15:04,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:04,940 INFO L481 AbstractCegarLoop]: Abstraction has 53280 states and 77215 transitions. [2020-10-28 19:15:04,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:15:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 53280 states and 77215 transitions. [2020-10-28 19:15:04,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:15:04,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:04,959 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] [2020-10-28 19:15:04,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:15:04,959 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:04,959 INFO L82 PathProgramCache]: Analyzing trace with hash 593251163, now seen corresponding path program 1 times [2020-10-28 19:15:04,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:04,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512340726] [2020-10-28 19:15:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:04,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:05,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:05,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:05,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:05,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:05,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:09,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:09,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:09,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:15:09,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:15:09,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:15:09,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:09,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:09,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:09,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:15:09,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 19:15:09,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:10,384 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:15:10,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:10,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:10,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:10,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:10,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:10,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:10,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:10,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:10,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:10,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:10,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:10,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:10,416 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 19:15:10,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512340726] [2020-10-28 19:15:10,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:10,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:10,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774713550] [2020-10-28 19:15:10,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:10,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:10,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:10,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:10,418 INFO L87 Difference]: Start difference. First operand 53280 states and 77215 transitions. Second operand 5 states. [2020-10-28 19:15:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:14,713 INFO L93 Difference]: Finished difference Result 88047 states and 127725 transitions. [2020-10-28 19:15:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:14,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:15:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:14,761 INFO L225 Difference]: With dead ends: 88047 [2020-10-28 19:15:14,761 INFO L226 Difference]: Without dead ends: 35691 [2020-10-28 19:15:14,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:15:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35691 states. [2020-10-28 19:15:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35691 to 35689. [2020-10-28 19:15:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35689 states. [2020-10-28 19:15:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35689 states to 35689 states and 51554 transitions. [2020-10-28 19:15:18,581 INFO L78 Accepts]: Start accepts. Automaton has 35689 states and 51554 transitions. Word has length 79 [2020-10-28 19:15:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:18,581 INFO L481 AbstractCegarLoop]: Abstraction has 35689 states and 51554 transitions. [2020-10-28 19:15:18,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 35689 states and 51554 transitions. [2020-10-28 19:15:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:15:18,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:18,593 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] [2020-10-28 19:15:18,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:15:18,594 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:18,594 INFO L82 PathProgramCache]: Analyzing trace with hash -440792937, now seen corresponding path program 1 times [2020-10-28 19:15:18,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:18,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967703996] [2020-10-28 19:15:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:18,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:18,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:18,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:19,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:19,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:23,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:23,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:15:23,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:15:23,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:15:23,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:23,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:23,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:23,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:15:23,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:15:23,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:24,032 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:15:24,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:24,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:24,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:24,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:24,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:24,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:24,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:24,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:24,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:24,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:24,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:24,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:24,061 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 19:15:24,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967703996] [2020-10-28 19:15:24,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:24,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:24,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259186346] [2020-10-28 19:15:24,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:24,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:24,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:24,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:24,063 INFO L87 Difference]: Start difference. First operand 35689 states and 51554 transitions. Second operand 5 states. [2020-10-28 19:15:24,465 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:15:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:29,630 INFO L93 Difference]: Finished difference Result 63254 states and 91709 transitions. [2020-10-28 19:15:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:15:29,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:15:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:29,675 INFO L225 Difference]: With dead ends: 63254 [2020-10-28 19:15:29,675 INFO L226 Difference]: Without dead ends: 36399 [2020-10-28 19:15:29,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:15:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36399 states. [2020-10-28 19:15:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36399 to 36392. [2020-10-28 19:15:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36392 states. [2020-10-28 19:15:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36392 states to 36392 states and 52269 transitions. [2020-10-28 19:15:33,526 INFO L78 Accepts]: Start accepts. Automaton has 36392 states and 52269 transitions. Word has length 79 [2020-10-28 19:15:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:33,526 INFO L481 AbstractCegarLoop]: Abstraction has 36392 states and 52269 transitions. [2020-10-28 19:15:33,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 36392 states and 52269 transitions. [2020-10-28 19:15:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:15:33,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:33,535 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] [2020-10-28 19:15:33,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 19:15:33,535 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:33,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1163440059, now seen corresponding path program 1 times [2020-10-28 19:15:33,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:33,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241042227] [2020-10-28 19:15:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:33,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:33,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:33,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:33,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:34,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:34,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:37,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:37,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:15:37,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:15:37,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3812 [2020-10-28 19:15:37,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:37,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:15:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 19:15:37,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:37,770 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:15:37,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:37,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:37,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:37,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:37,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:37,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:37,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:37,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:37,798 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 19:15:37,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241042227] [2020-10-28 19:15:37,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:37,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:37,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390362812] [2020-10-28 19:15:37,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:37,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:37,800 INFO L87 Difference]: Start difference. First operand 36392 states and 52269 transitions. Second operand 5 states. [2020-10-28 19:15:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:41,689 INFO L93 Difference]: Finished difference Result 39889 states and 56971 transitions. [2020-10-28 19:15:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:41,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:15:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:41,729 INFO L225 Difference]: With dead ends: 39889 [2020-10-28 19:15:41,729 INFO L226 Difference]: Without dead ends: 32385 [2020-10-28 19:15:41,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:15:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32385 states. [2020-10-28 19:15:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32385 to 32385. [2020-10-28 19:15:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32385 states. [2020-10-28 19:15:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32385 states to 32385 states and 46587 transitions. [2020-10-28 19:15:45,332 INFO L78 Accepts]: Start accepts. Automaton has 32385 states and 46587 transitions. Word has length 79 [2020-10-28 19:15:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:45,332 INFO L481 AbstractCegarLoop]: Abstraction has 32385 states and 46587 transitions. [2020-10-28 19:15:45,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 32385 states and 46587 transitions. [2020-10-28 19:15:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:15:45,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:45,340 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] [2020-10-28 19:15:45,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 19:15:45,340 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1586640498, now seen corresponding path program 1 times [2020-10-28 19:15:45,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:45,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513389307] [2020-10-28 19:15:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:45,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:45,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:45,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:45,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:46,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:49,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:49,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:15:49,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:15:49,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4433 [2020-10-28 19:15:49,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:49,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:49,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:15:49,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 19:15:49,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 19:15:49,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:50,169 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:15:50,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:50,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:50,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:50,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:50,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:50,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:50,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:50,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:50,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:50,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:50,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:50,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:50,196 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 19:15:50,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513389307] [2020-10-28 19:15:50,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:50,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:15:50,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185853627] [2020-10-28 19:15:50,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:15:50,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:50,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:15:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:15:50,198 INFO L87 Difference]: Start difference. First operand 32385 states and 46587 transitions. Second operand 4 states. [2020-10-28 19:15:50,587 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:15:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:55,198 INFO L93 Difference]: Finished difference Result 57335 states and 83666 transitions. [2020-10-28 19:15:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:55,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:15:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:55,246 INFO L225 Difference]: With dead ends: 57335 [2020-10-28 19:15:55,247 INFO L226 Difference]: Without dead ends: 35502 [2020-10-28 19:15:55,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:55,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35502 states. [2020-10-28 19:15:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35502 to 35332. [2020-10-28 19:15:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35332 states. [2020-10-28 19:15:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35332 states to 35332 states and 51453 transitions. [2020-10-28 19:15:59,406 INFO L78 Accepts]: Start accepts. Automaton has 35332 states and 51453 transitions. Word has length 80 [2020-10-28 19:15:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:59,406 INFO L481 AbstractCegarLoop]: Abstraction has 35332 states and 51453 transitions. [2020-10-28 19:15:59,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:15:59,407 INFO L276 IsEmpty]: Start isEmpty. Operand 35332 states and 51453 transitions. [2020-10-28 19:15:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:15:59,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:59,412 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] [2020-10-28 19:15:59,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 19:15:59,412 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2013763947, now seen corresponding path program 1 times [2020-10-28 19:15:59,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:59,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026254588] [2020-10-28 19:15:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:59,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:59,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:59,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:00,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:01,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:01,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:16:01,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:16:01,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1904 [2020-10-28 19:16:01,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:01,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:01,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:01,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 19:16:01,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 19:16:01,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:01,701 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:01,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:01,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:01,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:01,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:01,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:01,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:16:01,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:01,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:01,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:01,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:01,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:01,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:01,727 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 19:16:01,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026254588] [2020-10-28 19:16:01,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:01,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:01,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108817983] [2020-10-28 19:16:01,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:01,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:01,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:01,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:01,730 INFO L87 Difference]: Start difference. First operand 35332 states and 51453 transitions. Second operand 4 states. [2020-10-28 19:16:02,113 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:16:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:07,774 INFO L93 Difference]: Finished difference Result 63288 states and 93001 transitions. [2020-10-28 19:16:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:07,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 19:16:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted.