/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:42:55,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:42:55,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:42:56,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:42:56,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:42:56,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:42:56,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:42:56,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:42:56,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:42:56,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:42:56,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:42:56,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:42:56,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:42:56,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:42:56,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:42:56,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:42:56,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:42:56,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:42:56,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:42:56,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:42:56,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:42:56,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:42:56,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:42:56,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:42:56,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:42:56,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:42:56,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:42:56,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:42:56,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:42:56,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:42:56,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:42:56,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:42:56,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:42:56,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:42:56,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:42:56,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:42:56,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:42:56,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:42:56,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:42:56,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:42:56,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:42:56,073 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 [2020-10-29 13:42:56,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:42:56,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:42:56,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:42:56,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:42:56,103 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:42:56,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:42:56,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:42:56,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:42:56,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:42:56,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:42:56,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:42:56,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:42:56,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:42:56,104 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:42:56,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:42:56,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:42:56,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:42:56,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:42:56,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:42:56,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:42:56,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:42:56,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:42:56,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:42:56,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:42:56,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:42:56,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:42:56,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:42:56,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:42:56,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:42:56,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:42:56,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:42:56,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:42:56,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:42:56,569 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:42:56,569 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:42:56,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:42:56,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/554751d62/0176890bcb154ba799f1a5d8f9dab8a7/FLAGabdaf24c4 [2020-10-29 13:42:57,367 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:42:57,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:42:57,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/554751d62/0176890bcb154ba799f1a5d8f9dab8a7/FLAGabdaf24c4 [2020-10-29 13:42:57,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/554751d62/0176890bcb154ba799f1a5d8f9dab8a7 [2020-10-29 13:42:57,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:42:57,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:42:57,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:42:57,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:42:57,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:42:57,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:42:57" (1/1) ... [2020-10-29 13:42:57,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc505c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:57, skipping insertion in model container [2020-10-29 13:42:57,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:42:57" (1/1) ... [2020-10-29 13:42:57,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:42:57,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:42:58,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:42:58,137 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:42:58,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:42:58,311 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:42:58,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58 WrapperNode [2020-10-29 13:42:58,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:42:58,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:42:58,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:42:58,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:42:58,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58" (1/1) ... [2020-10-29 13:42:58,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58" (1/1) ... [2020-10-29 13:42:58,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58" (1/1) ... [2020-10-29 13:42:58,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58" (1/1) ... [2020-10-29 13:42:58,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58" (1/1) ... [2020-10-29 13:42:58,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58" (1/1) ... [2020-10-29 13:42:58,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58" (1/1) ... [2020-10-29 13:42:58,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:42:58,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:42:58,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:42:58,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:42:58,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58" (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 [2020-10-29 13:42:58,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:42:58,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:42:58,477 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:42:58,477 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:42:58,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:42:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:42:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:42:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:42:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:42:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:42:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:42:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:42:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:42:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:42:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:42:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:42:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:42:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:42:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:42:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:42:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:42:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:42:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:42:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:42:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:42:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:42:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:42:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:42:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:42:59,333 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:42:59,333 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:42:59,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:42:59 BoogieIcfgContainer [2020-10-29 13:42:59,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:42:59,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:42:59,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:42:59,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:42:59,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:42:57" (1/3) ... [2020-10-29 13:42:59,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77efc321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:42:59, skipping insertion in model container [2020-10-29 13:42:59,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:58" (2/3) ... [2020-10-29 13:42:59,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77efc321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:42:59, skipping insertion in model container [2020-10-29 13:42:59,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:42:59" (3/3) ... [2020-10-29 13:42:59,344 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:42:59,356 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:42:59,361 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:42:59,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:42:59,402 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:42:59,403 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:42:59,403 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:42:59,403 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:42:59,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:42:59,403 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:42:59,404 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:42:59,404 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:42:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states. [2020-10-29 13:42:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:42:59,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:59,435 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] [2020-10-29 13:42:59,435 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:59,442 INFO L82 PathProgramCache]: Analyzing trace with hash 816147482, now seen corresponding path program 1 times [2020-10-29 13:42:59,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:59,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840304693] [2020-10-29 13:42:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:59,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:00,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:00,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:00,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:03,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:03,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:43:03,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:43:03,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3859 [2020-10-29 13:43:03,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:03,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:43:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:43:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:43:03,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:43:03,998 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:04,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:04,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:04,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:04,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:04,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:04,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:43:04,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:04,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:04,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:04,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:04,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:04,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:43:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:04,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840304693] [2020-10-29 13:43:04,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:04,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:43:04,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309327070] [2020-10-29 13:43:04,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:43:04,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:04,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:43:04,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:43:04,118 INFO L87 Difference]: Start difference. First operand 121 states. Second operand 7 states. [2020-10-29 13:43:04,471 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:43:05,519 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:43:05,764 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:43:06,157 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:43:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:06,246 INFO L93 Difference]: Finished difference Result 556 states and 874 transitions. [2020-10-29 13:43:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:43:06,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-29 13:43:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:06,282 INFO L225 Difference]: With dead ends: 556 [2020-10-29 13:43:06,283 INFO L226 Difference]: Without dead ends: 446 [2020-10-29 13:43:06,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:43:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-29 13:43:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 194. [2020-10-29 13:43:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-29 13:43:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 289 transitions. [2020-10-29 13:43:06,411 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 289 transitions. Word has length 54 [2020-10-29 13:43:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:06,412 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 289 transitions. [2020-10-29 13:43:06,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:43:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 289 transitions. [2020-10-29 13:43:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:43:06,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:06,416 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] [2020-10-29 13:43:06,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:43:06,416 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:06,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1043986931, now seen corresponding path program 1 times [2020-10-29 13:43:06,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:06,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778171976] [2020-10-29 13:43:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:06,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:06,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:06,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:07,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:07,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:43:07,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:43:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1230 [2020-10-29 13:43:07,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:07,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:43:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:43:07,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 13:43:07,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:43:07,934 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:07,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:07,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:07,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:07,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:07,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:43:07,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:07,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:07,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:07,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:07,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778171976] [2020-10-29 13:43:07,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:07,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:43:07,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758100333] [2020-10-29 13:43:07,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:43:07,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:07,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:43:07,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:43:07,984 INFO L87 Difference]: Start difference. First operand 194 states and 289 transitions. Second operand 4 states. [2020-10-29 13:43:08,228 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:43:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:08,923 INFO L93 Difference]: Finished difference Result 488 states and 753 transitions. [2020-10-29 13:43:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:43:08,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-29 13:43:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:08,929 INFO L225 Difference]: With dead ends: 488 [2020-10-29 13:43:08,929 INFO L226 Difference]: Without dead ends: 325 [2020-10-29 13:43:08,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:43:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-29 13:43:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-10-29 13:43:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-29 13:43:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 491 transitions. [2020-10-29 13:43:08,966 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 491 transitions. Word has length 55 [2020-10-29 13:43:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:08,966 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 491 transitions. [2020-10-29 13:43:08,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:43:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 491 transitions. [2020-10-29 13:43:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:43:08,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:08,969 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] [2020-10-29 13:43:08,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:43:08,970 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1551212949, now seen corresponding path program 1 times [2020-10-29 13:43:08,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:08,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393436973] [2020-10-29 13:43:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:09,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:09,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:09,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:09,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:09,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:43:09,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:43:09,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-29 13:43:09,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:09,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:09,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:43:09,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:43:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 13:43:09,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:09,858 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:09,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:09,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:09,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:09,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:09,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:43:09,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:09,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:09,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:09,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393436973] [2020-10-29 13:43:09,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:09,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:43:09,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252979163] [2020-10-29 13:43:09,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:43:09,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:43:09,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:43:09,906 INFO L87 Difference]: Start difference. First operand 322 states and 491 transitions. Second operand 4 states. [2020-10-29 13:43:10,136 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:43:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:10,827 INFO L93 Difference]: Finished difference Result 840 states and 1307 transitions. [2020-10-29 13:43:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:43:10,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-29 13:43:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:10,832 INFO L225 Difference]: With dead ends: 840 [2020-10-29 13:43:10,832 INFO L226 Difference]: Without dead ends: 549 [2020-10-29 13:43:10,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:43:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-29 13:43:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 546. [2020-10-29 13:43:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-10-29 13:43:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 841 transitions. [2020-10-29 13:43:10,901 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 841 transitions. Word has length 56 [2020-10-29 13:43:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:10,902 INFO L481 AbstractCegarLoop]: Abstraction has 546 states and 841 transitions. [2020-10-29 13:43:10,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:43:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 841 transitions. [2020-10-29 13:43:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:43:10,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:10,905 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] [2020-10-29 13:43:10,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:43:10,905 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash 925803340, now seen corresponding path program 1 times [2020-10-29 13:43:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:10,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545674807] [2020-10-29 13:43:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:10,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:11,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:11,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:43:11,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:43:11,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-29 13:43:11,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:11,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:11,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:43:11,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 13:43:11,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 13:43:11,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:43:11,508 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:11,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:11,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:11,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:11,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:11,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:11,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:43:11,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:11,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:11,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:11,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:11,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:11,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:11,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545674807] [2020-10-29 13:43:11,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:11,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:43:11,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477878273] [2020-10-29 13:43:11,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:43:11,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:43:11,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:43:11,554 INFO L87 Difference]: Start difference. First operand 546 states and 841 transitions. Second operand 4 states. [2020-10-29 13:43:11,831 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:43:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:12,421 INFO L93 Difference]: Finished difference Result 1448 states and 2253 transitions. [2020-10-29 13:43:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:43:12,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-29 13:43:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:12,429 INFO L225 Difference]: With dead ends: 1448 [2020-10-29 13:43:12,430 INFO L226 Difference]: Without dead ends: 933 [2020-10-29 13:43:12,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:43:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-10-29 13:43:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 930. [2020-10-29 13:43:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-10-29 13:43:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1433 transitions. [2020-10-29 13:43:12,513 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1433 transitions. Word has length 57 [2020-10-29 13:43:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:12,514 INFO L481 AbstractCegarLoop]: Abstraction has 930 states and 1433 transitions. [2020-10-29 13:43:12,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:43:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1433 transitions. [2020-10-29 13:43:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:43:12,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:12,527 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] [2020-10-29 13:43:12,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:43:12,527 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:12,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1945751650, now seen corresponding path program 1 times [2020-10-29 13:43:12,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:12,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625132715] [2020-10-29 13:43:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:12,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:12,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:13,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:13,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:43:13,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:43:13,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-29 13:43:13,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:13,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:43:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:43:13,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:43:13,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:13,535 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:13,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:13,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:13,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:13,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:13,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:13,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:43:13,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:13,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:13,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:13,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:13,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:13,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:13,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625132715] [2020-10-29 13:43:13,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:13,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:43:13,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139045970] [2020-10-29 13:43:13,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:43:13,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:13,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:43:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:43:13,606 INFO L87 Difference]: Start difference. First operand 930 states and 1433 transitions. Second operand 7 states. [2020-10-29 13:43:14,373 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:43:14,636 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:43:14,848 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:43:15,093 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:43:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:15,862 INFO L93 Difference]: Finished difference Result 4038 states and 6241 transitions. [2020-10-29 13:43:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:43:15,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-29 13:43:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:15,879 INFO L225 Difference]: With dead ends: 4038 [2020-10-29 13:43:15,879 INFO L226 Difference]: Without dead ends: 3139 [2020-10-29 13:43:15,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:43:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2020-10-29 13:43:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3130. [2020-10-29 13:43:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3130 states. [2020-10-29 13:43:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4817 transitions. [2020-10-29 13:43:16,112 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4817 transitions. Word has length 58 [2020-10-29 13:43:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:16,112 INFO L481 AbstractCegarLoop]: Abstraction has 3130 states and 4817 transitions. [2020-10-29 13:43:16,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:43:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4817 transitions. [2020-10-29 13:43:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:43:16,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:16,114 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] [2020-10-29 13:43:16,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:43:16,115 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1564816550, now seen corresponding path program 1 times [2020-10-29 13:43:16,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:16,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786198514] [2020-10-29 13:43:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:16,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:16,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:16,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:16,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:43:16,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:43:16,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-29 13:43:16,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:16,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:16,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:43:16,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:43:16,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:43:16,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:16,647 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:16,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:16,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:16,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:16,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:16,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:16,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:43:16,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:16,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:16,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:16,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786198514] [2020-10-29 13:43:16,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:16,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:43:16,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789481375] [2020-10-29 13:43:16,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:43:16,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:43:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:43:16,686 INFO L87 Difference]: Start difference. First operand 3130 states and 4817 transitions. Second operand 4 states. [2020-10-29 13:43:16,961 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:43:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:18,008 INFO L93 Difference]: Finished difference Result 8256 states and 12661 transitions. [2020-10-29 13:43:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:43:18,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-29 13:43:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:18,037 INFO L225 Difference]: With dead ends: 8256 [2020-10-29 13:43:18,038 INFO L226 Difference]: Without dead ends: 5157 [2020-10-29 13:43:18,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:43:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2020-10-29 13:43:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 5154. [2020-10-29 13:43:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5154 states. [2020-10-29 13:43:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5154 states to 5154 states and 7809 transitions. [2020-10-29 13:43:18,447 INFO L78 Accepts]: Start accepts. Automaton has 5154 states and 7809 transitions. Word has length 59 [2020-10-29 13:43:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:18,448 INFO L481 AbstractCegarLoop]: Abstraction has 5154 states and 7809 transitions. [2020-10-29 13:43:18,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:43:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5154 states and 7809 transitions. [2020-10-29 13:43:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:43:18,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:18,450 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] [2020-10-29 13:43:18,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:43:18,450 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:18,451 INFO L82 PathProgramCache]: Analyzing trace with hash 241985895, now seen corresponding path program 1 times [2020-10-29 13:43:18,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:18,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881946181] [2020-10-29 13:43:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:18,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:18,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:18,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:18,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:43:18,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:43:18,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-29 13:43:18,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:18,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:43:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:43:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:43:18,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:43:19,284 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:19,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:19,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:19,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:19,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:19,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:43:19,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:19,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:19,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:43:19,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:19,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:43:19,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:19,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881946181] [2020-10-29 13:43:19,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:19,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:43:19,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249740927] [2020-10-29 13:43:19,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:43:19,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:19,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:43:19,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:43:19,342 INFO L87 Difference]: Start difference. First operand 5154 states and 7809 transitions. Second operand 6 states. [2020-10-29 13:43:19,596 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:43:20,549 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:43:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:21,052 INFO L93 Difference]: Finished difference Result 15288 states and 23141 transitions. [2020-10-29 13:43:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:43:21,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-29 13:43:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:21,107 INFO L225 Difference]: With dead ends: 15288 [2020-10-29 13:43:21,107 INFO L226 Difference]: Without dead ends: 10165 [2020-10-29 13:43:21,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:43:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10165 states. [2020-10-29 13:43:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10165 to 10162. [2020-10-29 13:43:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10162 states. [2020-10-29 13:43:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10162 states to 10162 states and 15249 transitions. [2020-10-29 13:43:21,963 INFO L78 Accepts]: Start accepts. Automaton has 10162 states and 15249 transitions. Word has length 60 [2020-10-29 13:43:21,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:21,964 INFO L481 AbstractCegarLoop]: Abstraction has 10162 states and 15249 transitions. [2020-10-29 13:43:21,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:43:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10162 states and 15249 transitions. [2020-10-29 13:43:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:43:21,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:21,965 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] [2020-10-29 13:43:21,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:43:21,965 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:21,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:21,966 INFO L82 PathProgramCache]: Analyzing trace with hash -723466036, now seen corresponding path program 1 times [2020-10-29 13:43:21,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:21,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070532260] [2020-10-29 13:43:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:22,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:22,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:22,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:43:22,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:22,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-29 13:43:22,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:22,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:22,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:43:22,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-29 13:43:22,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:43:22,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:22,450 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:22,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:22,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:22,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:22,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:22,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:22,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:43:22,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:22,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:22,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:22,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070532260] [2020-10-29 13:43:22,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:22,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:43:22,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759100211] [2020-10-29 13:43:22,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:43:22,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:22,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:43:22,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:43:22,484 INFO L87 Difference]: Start difference. First operand 10162 states and 15249 transitions. Second operand 5 states. [2020-10-29 13:43:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:24,449 INFO L93 Difference]: Finished difference Result 20805 states and 30979 transitions. [2020-10-29 13:43:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:43:24,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-29 13:43:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:24,510 INFO L225 Difference]: With dead ends: 20805 [2020-10-29 13:43:24,511 INFO L226 Difference]: Without dead ends: 20802 [2020-10-29 13:43:24,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:43:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20802 states. [2020-10-29 13:43:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20802 to 10674. [2020-10-29 13:43:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10674 states. [2020-10-29 13:43:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10674 states to 10674 states and 15761 transitions. [2020-10-29 13:43:25,630 INFO L78 Accepts]: Start accepts. Automaton has 10674 states and 15761 transitions. Word has length 60 [2020-10-29 13:43:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:25,631 INFO L481 AbstractCegarLoop]: Abstraction has 10674 states and 15761 transitions. [2020-10-29 13:43:25,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:43:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 10674 states and 15761 transitions. [2020-10-29 13:43:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:43:25,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:25,632 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] [2020-10-29 13:43:25,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:43:25,633 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash -654638388, now seen corresponding path program 1 times [2020-10-29 13:43:25,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:25,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480407862] [2020-10-29 13:43:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:25,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:25,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:25,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:43:25,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:25,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-29 13:43:25,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:25,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:25,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:43:25,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:43:25,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:43:25,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:26,062 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:26,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:26,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:26,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:26,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:26,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:26,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:43:26,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:26,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:26,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:26,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:26,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:26,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:26,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480407862] [2020-10-29 13:43:26,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:26,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:43:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919757872] [2020-10-29 13:43:26,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:43:26,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:43:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:43:26,116 INFO L87 Difference]: Start difference. First operand 10674 states and 15761 transitions. Second operand 4 states. [2020-10-29 13:43:26,389 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:43:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:27,837 INFO L93 Difference]: Finished difference Result 23794 states and 35083 transitions. [2020-10-29 13:43:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:43:27,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-29 13:43:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:27,872 INFO L225 Difference]: With dead ends: 23794 [2020-10-29 13:43:27,872 INFO L226 Difference]: Without dead ends: 13151 [2020-10-29 13:43:27,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:43:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13151 states. [2020-10-29 13:43:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13151 to 13092. [2020-10-29 13:43:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13092 states. [2020-10-29 13:43:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13092 states to 13092 states and 19183 transitions. [2020-10-29 13:43:29,040 INFO L78 Accepts]: Start accepts. Automaton has 13092 states and 19183 transitions. Word has length 61 [2020-10-29 13:43:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:29,040 INFO L481 AbstractCegarLoop]: Abstraction has 13092 states and 19183 transitions. [2020-10-29 13:43:29,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:43:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 13092 states and 19183 transitions. [2020-10-29 13:43:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:43:29,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:29,049 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:29,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:43:29,049 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash -861966590, now seen corresponding path program 1 times [2020-10-29 13:43:29,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:29,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948088499] [2020-10-29 13:43:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:29,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:29,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:29,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:29,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:29,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:29,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:34,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:34,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:43:34,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:43:34,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:43:34,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:34,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:34,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:43:34,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:43:34,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:43:34,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:34,430 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:34,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:34,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:34,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:34,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:34,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:43:34,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:34,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:34,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:34,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:34,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:34,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:34,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948088499] [2020-10-29 13:43:34,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:34,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:43:34,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313529663] [2020-10-29 13:43:34,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:43:34,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:34,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:43:34,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:43:34,493 INFO L87 Difference]: Start difference. First operand 13092 states and 19183 transitions. Second operand 7 states. [2020-10-29 13:43:35,879 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:43:36,116 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:43:36,357 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:43:36,608 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:43:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:37,533 INFO L93 Difference]: Finished difference Result 32497 states and 47689 transitions. [2020-10-29 13:43:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:43:37,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-29 13:43:37,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:37,576 INFO L225 Difference]: With dead ends: 32497 [2020-10-29 13:43:37,577 INFO L226 Difference]: Without dead ends: 22102 [2020-10-29 13:43:37,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:43:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22102 states. [2020-10-29 13:43:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22102 to 22093. [2020-10-29 13:43:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22093 states. [2020-10-29 13:43:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22093 states to 22093 states and 32113 transitions. [2020-10-29 13:43:39,319 INFO L78 Accepts]: Start accepts. Automaton has 22093 states and 32113 transitions. Word has length 84 [2020-10-29 13:43:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:39,319 INFO L481 AbstractCegarLoop]: Abstraction has 22093 states and 32113 transitions. [2020-10-29 13:43:39,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:43:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 22093 states and 32113 transitions. [2020-10-29 13:43:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:43:39,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:39,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:39,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:43:39,332 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:39,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1093253304, now seen corresponding path program 1 times [2020-10-29 13:43:39,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:39,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716894752] [2020-10-29 13:43:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:39,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:39,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:39,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:41,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:41,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:43:41,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:43:41,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1726 [2020-10-29 13:43:41,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:41,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:43:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:43:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 13:43:41,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:41,419 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:41,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:41,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:41,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:41,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:41,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:41,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:43:41,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:41,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:41,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:41,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:41,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:41,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:43:41,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716894752] [2020-10-29 13:43:41,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:43:41,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:43:41,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138219351] [2020-10-29 13:43:41,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:43:41,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:41,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:43:41,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:43:41,481 INFO L87 Difference]: Start difference. First operand 22093 states and 32113 transitions. Second operand 5 states. [2020-10-29 13:43:41,746 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:43:43,002 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:43:43,252 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:43:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:45,270 INFO L93 Difference]: Finished difference Result 56254 states and 81911 transitions. [2020-10-29 13:43:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:43:45,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-29 13:43:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:45,332 INFO L225 Difference]: With dead ends: 56254 [2020-10-29 13:43:45,332 INFO L226 Difference]: Without dead ends: 38315 [2020-10-29 13:43:45,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:43:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38315 states. [2020-10-29 13:43:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38315 to 38093. [2020-10-29 13:43:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38093 states. [2020-10-29 13:43:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38093 states to 38093 states and 54785 transitions. [2020-10-29 13:43:48,044 INFO L78 Accepts]: Start accepts. Automaton has 38093 states and 54785 transitions. Word has length 84 [2020-10-29 13:43:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:48,044 INFO L481 AbstractCegarLoop]: Abstraction has 38093 states and 54785 transitions. [2020-10-29 13:43:48,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:43:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 38093 states and 54785 transitions. [2020-10-29 13:43:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:43:48,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:48,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:48,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:43:48,058 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1894423645, now seen corresponding path program 1 times [2020-10-29 13:43:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:48,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501802872] [2020-10-29 13:43:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:48,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:48,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:48,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:48,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:49,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:53,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:53,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:43:53,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:43:53,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:43:53,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:53,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:43:53,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:43:53,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:43:53,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:53,458 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:43:53,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:53,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:53,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:53,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:53,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:43:53,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:53,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:53,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:43:53,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:53,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:43:53,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:43:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:53,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501802872] [2020-10-29 13:43:53,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:43:53,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:43:53,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065770128] [2020-10-29 13:43:53,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:43:53,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:43:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:43:53,559 INFO L87 Difference]: Start difference. First operand 38093 states and 54785 transitions. Second operand 8 states. [2020-10-29 13:43:53,825 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:43:55,698 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:43:56,037 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:44:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:01,133 INFO L93 Difference]: Finished difference Result 120141 states and 172040 transitions. [2020-10-29 13:44:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:44:01,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-29 13:44:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:01,269 INFO L225 Difference]: With dead ends: 120141 [2020-10-29 13:44:01,269 INFO L226 Difference]: Without dead ends: 82082 [2020-10-29 13:44:01,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:44:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82082 states. [2020-10-29 13:44:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82082 to 44037. [2020-10-29 13:44:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44037 states. [2020-10-29 13:44:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44037 states to 44037 states and 62649 transitions. [2020-10-29 13:44:05,636 INFO L78 Accepts]: Start accepts. Automaton has 44037 states and 62649 transitions. Word has length 84 [2020-10-29 13:44:05,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:05,636 INFO L481 AbstractCegarLoop]: Abstraction has 44037 states and 62649 transitions. [2020-10-29 13:44:05,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:44:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 44037 states and 62649 transitions. [2020-10-29 13:44:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:44:05,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:05,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:05,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:44:05,648 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:05,649 INFO L82 PathProgramCache]: Analyzing trace with hash -987879714, now seen corresponding path program 1 times [2020-10-29 13:44:05,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:05,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574321750] [2020-10-29 13:44:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:05,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:05,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:05,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:05,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:06,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:06,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:09,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:09,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:44:09,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:44:09,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4118 [2020-10-29 13:44:09,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:09,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:44:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:44:09,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:10,061 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:44:10,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:10,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:10,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:10,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:10,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:10,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:44:10,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:10,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:10,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:10,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:10,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:10,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:10,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574321750] [2020-10-29 13:44:10,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:44:10,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:44:10,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217716538] [2020-10-29 13:44:10,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:10,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:10,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:10,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:10,114 INFO L87 Difference]: Start difference. First operand 44037 states and 62649 transitions. Second operand 6 states. [2020-10-29 13:44:10,363 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:44:12,483 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:44:12,881 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:44:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:27,080 INFO L93 Difference]: Finished difference Result 230893 states and 326533 transitions. [2020-10-29 13:44:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:44:27,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-29 13:44:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:27,413 INFO L225 Difference]: With dead ends: 230893 [2020-10-29 13:44:27,414 INFO L226 Difference]: Without dead ends: 186890 [2020-10-29 13:44:27,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:44:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186890 states. [2020-10-29 13:44:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186890 to 140613. [2020-10-29 13:44:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140613 states. [2020-10-29 13:44:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140613 states to 140613 states and 198557 transitions. [2020-10-29 13:44:40,398 INFO L78 Accepts]: Start accepts. Automaton has 140613 states and 198557 transitions. Word has length 84 [2020-10-29 13:44:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:40,398 INFO L481 AbstractCegarLoop]: Abstraction has 140613 states and 198557 transitions. [2020-10-29 13:44:40,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 140613 states and 198557 transitions. [2020-10-29 13:44:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:44:40,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:40,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:40,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:44:40,417 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:40,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:40,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1100078709, now seen corresponding path program 1 times [2020-10-29 13:44:40,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:40,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475906711] [2020-10-29 13:44:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:40,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:40,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:40,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:40,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:45,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:45,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:44:45,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:44:45,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:44:45,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:45,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:45,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:44:45,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:45,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 13:44:45,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:45,780 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:44:45,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:45,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:45,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:45,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:45,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:45,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:44:45,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:45,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:45,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:45,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:45,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475906711] [2020-10-29 13:44:45,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:44:45,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:44:45,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157152548] [2020-10-29 13:44:45,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:44:45,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:45,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:44:45,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:45,836 INFO L87 Difference]: Start difference. First operand 140613 states and 198557 transitions. Second operand 9 states. [2020-10-29 13:44:46,074 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:44:48,759 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:44:49,400 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:45:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:22,743 INFO L93 Difference]: Finished difference Result 526805 states and 740951 transitions. [2020-10-29 13:45:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:45:22,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-29 13:45:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:23,873 INFO L225 Difference]: With dead ends: 526805 [2020-10-29 13:45:23,873 INFO L226 Difference]: Without dead ends: 386226 [2020-10-29 13:45:24,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:45:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386226 states. [2020-10-29 13:45:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386226 to 166315. [2020-10-29 13:45:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166315 states. [2020-10-29 13:45:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166315 states to 166315 states and 232361 transitions. [2020-10-29 13:45:41,867 INFO L78 Accepts]: Start accepts. Automaton has 166315 states and 232361 transitions. Word has length 84 [2020-10-29 13:45:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:41,868 INFO L481 AbstractCegarLoop]: Abstraction has 166315 states and 232361 transitions. [2020-10-29 13:45:41,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:45:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 166315 states and 232361 transitions. [2020-10-29 13:45:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:45:41,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:41,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:41,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:45:41,883 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:41,891 INFO L82 PathProgramCache]: Analyzing trace with hash 277950851, now seen corresponding path program 1 times [2020-10-29 13:45:41,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:41,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780722103] [2020-10-29 13:45:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:41,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:42,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:42,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:44,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:46,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:46,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:45:46,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:45:46,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:45:46,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:46,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:46,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:45:46,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:45:46,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:45:46,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:47,202 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:45:47,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:47,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:47,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:47,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:45:47,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:47,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 13:45:47,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780722103] [2020-10-29 13:45:47,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:45:47,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:45:47,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935612617] [2020-10-29 13:45:47,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:45:47,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:45:47,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:45:47,235 INFO L87 Difference]: Start difference. First operand 166315 states and 232361 transitions. Second operand 7 states. [2020-10-29 13:45:47,539 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:45:49,578 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:45:49,877 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 150