/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.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:40:24,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:40:24,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:40:24,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:40:24,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:40:24,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:40:24,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:40:24,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:40:24,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:40:24,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:40:24,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:40:24,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:40:24,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:40:24,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:40:24,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:40:24,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:40:24,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:40:24,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:40:24,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:40:24,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:40:24,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:40:24,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:40:24,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:40:24,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:40:24,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:40:24,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:40:24,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:40:24,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:40:24,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:40:24,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:40:24,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:40:24,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:40:24,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:40:24,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:40:24,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:40:24,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:40:24,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:40:24,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:40:24,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:40:24,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:40:24,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:40:24,457 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 13:40:24,484 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:40:24,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:40:24,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:40:24,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:40:24,487 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:40:24,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:40:24,488 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:40:24,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:40:24,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:40:24,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:40:24,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:40:24,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:40:24,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:40:24,489 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:40:24,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:40:24,490 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:40:24,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:40:24,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:40:24,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:40:24,491 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:40:24,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:40:24,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:40:24,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:40:24,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:40:24,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:40:24,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:40:24,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:40:24,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:40:24,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:40:24,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:40:24,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:40:24,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:40:24,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:40:24,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:40:24,918 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:40:24,920 INFO L432 ainManager$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.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:40:25,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff6e5afb2/c7aeb0b12ebe43a1b9f5b141951de442/FLAG1320227e0 [2020-10-29 13:40:25,794 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:40:25,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:40:25,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff6e5afb2/c7aeb0b12ebe43a1b9f5b141951de442/FLAG1320227e0 [2020-10-29 13:40:26,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff6e5afb2/c7aeb0b12ebe43a1b9f5b141951de442 [2020-10-29 13:40:26,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:40:26,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:40:26,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:40:26,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:40:26,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:40:26,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:40:26" (1/1) ... [2020-10-29 13:40:26,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6871c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26, skipping insertion in model container [2020-10-29 13:40:26,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:40:26" (1/1) ... [2020-10-29 13:40:26,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:40:26,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:40:26,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:40:26,398 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:40:26,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:40:26,525 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:40:26,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26 WrapperNode [2020-10-29 13:40:26,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:40:26,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:40:26,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:40:26,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:40:26,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26" (1/1) ... [2020-10-29 13:40:26,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26" (1/1) ... [2020-10-29 13:40:26,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26" (1/1) ... [2020-10-29 13:40:26,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26" (1/1) ... [2020-10-29 13:40:26,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26" (1/1) ... [2020-10-29 13:40:26,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26" (1/1) ... [2020-10-29 13:40:26,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26" (1/1) ... [2020-10-29 13:40:26,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:40:26,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:40:26,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:40:26,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:40:26,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26" (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 13:40:26,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:40:26,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:40:26,678 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:40:26,678 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:40:26,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:40:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:40:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:40:26,679 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:40:26,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:40:26,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:40:26,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:40:26,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:40:26,679 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:40:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:40:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:40:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:40:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:40:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:40:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:40:26,681 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:40:26,681 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:40:26,681 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:40:26,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:40:26,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:40:26,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:40:26,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:40:26,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:40:26,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:40:27,319 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:40:27,319 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:40:27,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:40:27 BoogieIcfgContainer [2020-10-29 13:40:27,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:40:27,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:40:27,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:40:27,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:40:27,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:40:26" (1/3) ... [2020-10-29 13:40:27,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378aa2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:40:27, skipping insertion in model container [2020-10-29 13:40:27,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:26" (2/3) ... [2020-10-29 13:40:27,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378aa2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:40:27, skipping insertion in model container [2020-10-29 13:40:27,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:40:27" (3/3) ... [2020-10-29 13:40:27,332 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:40:27,345 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:40:27,351 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:40:27,380 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:40:27,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:40:27,454 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:40:27,455 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:40:27,455 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:40:27,459 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:40:27,459 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:40:27,459 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:40:27,459 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:40:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-10-29 13:40:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:40:27,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:27,506 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] [2020-10-29 13:40:27,506 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:27,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:27,513 INFO L82 PathProgramCache]: Analyzing trace with hash -734565587, now seen corresponding path program 1 times [2020-10-29 13:40:27,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:27,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289246563] [2020-10-29 13:40:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:27,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:28,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:28,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:29,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:29,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:40:29,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:40:29,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1629 [2020-10-29 13:40:29,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:29,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:40:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:40:29,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:40:29,705 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:29,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:29,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:29,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:29,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:29,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:29,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:40:29,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:29,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:29,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:29,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:29,754 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 13:40:29,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289246563] [2020-10-29 13:40:29,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:29,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847333488] [2020-10-29 13:40:29,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:29,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:29,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:29,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:29,783 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 6 states. [2020-10-29 13:40:30,035 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:40:30,682 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:40:30,841 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:40:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:30,880 INFO L93 Difference]: Finished difference Result 372 states and 579 transitions. [2020-10-29 13:40:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:40:30,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-29 13:40:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:30,913 INFO L225 Difference]: With dead ends: 372 [2020-10-29 13:40:30,913 INFO L226 Difference]: Without dead ends: 284 [2020-10-29 13:40:30,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:40:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-29 13:40:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 151. [2020-10-29 13:40:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-29 13:40:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 224 transitions. [2020-10-29 13:40:31,032 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 224 transitions. Word has length 43 [2020-10-29 13:40:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:31,033 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 224 transitions. [2020-10-29 13:40:31,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 224 transitions. [2020-10-29 13:40:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:40:31,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:31,036 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] [2020-10-29 13:40:31,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:40:31,036 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1871397161, now seen corresponding path program 1 times [2020-10-29 13:40:31,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:31,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377279665] [2020-10-29 13:40:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:31,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:31,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:31,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:31,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:31,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:40:31,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:40:31,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-29 13:40:31,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:31,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:31,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:31,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:40:31,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:40:31,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:31,827 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:31,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:31,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:31,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:31,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:31,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:40:31,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:31,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:31,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:31,868 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 13:40:31,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377279665] [2020-10-29 13:40:31,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:31,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:40:31,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118078231] [2020-10-29 13:40:31,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:40:31,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:31,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:40:31,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:40:31,873 INFO L87 Difference]: Start difference. First operand 151 states and 224 transitions. Second operand 4 states. [2020-10-29 13:40:32,075 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:40:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:32,420 INFO L93 Difference]: Finished difference Result 373 states and 572 transitions. [2020-10-29 13:40:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:40:32,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-29 13:40:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:32,423 INFO L225 Difference]: With dead ends: 373 [2020-10-29 13:40:32,423 INFO L226 Difference]: Without dead ends: 246 [2020-10-29 13:40:32,425 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 13:40:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-29 13:40:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-29 13:40:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-29 13:40:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 368 transitions. [2020-10-29 13:40:32,450 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 368 transitions. Word has length 44 [2020-10-29 13:40:32,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:32,451 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 368 transitions. [2020-10-29 13:40:32,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:40:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 368 transitions. [2020-10-29 13:40:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:40:32,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:32,453 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] [2020-10-29 13:40:32,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:40:32,453 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:32,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:32,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1535400688, now seen corresponding path program 1 times [2020-10-29 13:40:32,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:32,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839443592] [2020-10-29 13:40:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:32,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:32,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:32,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:32,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:40:32,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:40:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-29 13:40:32,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:32,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:40:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:40:32,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:32,913 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:32,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:32,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:32,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:32,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:32,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:32,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:40:32,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:32,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:32,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:32,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:32,949 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 13:40:32,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839443592] [2020-10-29 13:40:32,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:32,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:40:32,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193013427] [2020-10-29 13:40:32,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:40:32,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:32,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:40:32,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:40:32,953 INFO L87 Difference]: Start difference. First operand 243 states and 368 transitions. Second operand 4 states. [2020-10-29 13:40:33,135 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:40:33,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:33,542 INFO L93 Difference]: Finished difference Result 617 states and 952 transitions. [2020-10-29 13:40:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:40:33,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-29 13:40:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:33,545 INFO L225 Difference]: With dead ends: 617 [2020-10-29 13:40:33,545 INFO L226 Difference]: Without dead ends: 398 [2020-10-29 13:40:33,547 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 13:40:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-29 13:40:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2020-10-29 13:40:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-29 13:40:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 602 transitions. [2020-10-29 13:40:33,582 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 602 transitions. Word has length 45 [2020-10-29 13:40:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:33,582 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 602 transitions. [2020-10-29 13:40:33,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:40:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 602 transitions. [2020-10-29 13:40:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 13:40:33,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:33,592 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] [2020-10-29 13:40:33,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:40:33,592 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1127369728, now seen corresponding path program 1 times [2020-10-29 13:40:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:33,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236875272] [2020-10-29 13:40:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:33,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:34,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:34,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 13:40:34,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:40:34,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-29 13:40:34,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:34,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:34,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:34,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:40:34,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:40:34,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:34,260 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:34,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:34,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:34,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:34,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:34,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:40:34,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:34,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:34,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:34,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:34,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:34,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-10-29 13:40:34,326 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 13:40:34,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236875272] [2020-10-29 13:40:34,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:34,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:34,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142294831] [2020-10-29 13:40:34,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:34,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:34,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:34,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:34,329 INFO L87 Difference]: Start difference. First operand 395 states and 602 transitions. Second operand 6 states. [2020-10-29 13:40:34,939 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:40:35,156 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:40:35,321 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:40:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:35,810 INFO L93 Difference]: Finished difference Result 1356 states and 2088 transitions. [2020-10-29 13:40:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:40:35,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-29 13:40:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:35,819 INFO L225 Difference]: With dead ends: 1356 [2020-10-29 13:40:35,819 INFO L226 Difference]: Without dead ends: 985 [2020-10-29 13:40:35,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:40:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-10-29 13:40:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 979. [2020-10-29 13:40:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 979 states. [2020-10-29 13:40:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1498 transitions. [2020-10-29 13:40:35,915 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1498 transitions. Word has length 46 [2020-10-29 13:40:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:35,916 INFO L481 AbstractCegarLoop]: Abstraction has 979 states and 1498 transitions. [2020-10-29 13:40:35,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1498 transitions. [2020-10-29 13:40:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:40:35,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:35,919 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] [2020-10-29 13:40:35,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:40:35,919 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash -739400431, now seen corresponding path program 1 times [2020-10-29 13:40:35,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:35,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905048361] [2020-10-29 13:40:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:35,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:36,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:36,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:36,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:40:36,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:40:36,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-29 13:40:36,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:36,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:40:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:40:36,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:36,468 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:36,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:36,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:36,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:36,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:36,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:36,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:40:36,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:36,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:36,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:36,507 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 13:40:36,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905048361] [2020-10-29 13:40:36,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:36,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:40:36,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555776472] [2020-10-29 13:40:36,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:40:36,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:40:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:40:36,510 INFO L87 Difference]: Start difference. First operand 979 states and 1498 transitions. Second operand 4 states. [2020-10-29 13:40:36,726 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:40:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:37,364 INFO L93 Difference]: Finished difference Result 2497 states and 3814 transitions. [2020-10-29 13:40:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:40:37,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-29 13:40:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:37,377 INFO L225 Difference]: With dead ends: 2497 [2020-10-29 13:40:37,377 INFO L226 Difference]: Without dead ends: 1542 [2020-10-29 13:40:37,380 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 13:40:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-10-29 13:40:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1539. [2020-10-29 13:40:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1539 states. [2020-10-29 13:40:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 2314 transitions. [2020-10-29 13:40:37,504 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 2314 transitions. Word has length 47 [2020-10-29 13:40:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:37,504 INFO L481 AbstractCegarLoop]: Abstraction has 1539 states and 2314 transitions. [2020-10-29 13:40:37,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:40:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 2314 transitions. [2020-10-29 13:40:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:40:37,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:37,506 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] [2020-10-29 13:40:37,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:40:37,507 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:37,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:37,507 INFO L82 PathProgramCache]: Analyzing trace with hash 643385751, now seen corresponding path program 1 times [2020-10-29 13:40:37,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:37,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551338178] [2020-10-29 13:40:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:37,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:37,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:38,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:38,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:40:38,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:40:38,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-29 13:40:38,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:38,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:38,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:38,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:40:38,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:40:38,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:38,394 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:38,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:38,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:38,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:38,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:38,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:38,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:40:38,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:38,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:38,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:40:38,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:38,470 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 13:40:38,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551338178] [2020-10-29 13:40:38,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:38,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:40:38,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188692331] [2020-10-29 13:40:38,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:38,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:38,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:38,475 INFO L87 Difference]: Start difference. First operand 1539 states and 2314 transitions. Second operand 6 states. [2020-10-29 13:40:38,665 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:40:39,296 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:40:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:39,454 INFO L93 Difference]: Finished difference Result 4529 states and 6814 transitions. [2020-10-29 13:40:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:40:39,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-29 13:40:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:39,470 INFO L225 Difference]: With dead ends: 4529 [2020-10-29 13:40:39,471 INFO L226 Difference]: Without dead ends: 3014 [2020-10-29 13:40:39,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:40:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-10-29 13:40:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3011. [2020-10-29 13:40:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3011 states. [2020-10-29 13:40:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4482 transitions. [2020-10-29 13:40:39,682 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4482 transitions. Word has length 48 [2020-10-29 13:40:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:39,682 INFO L481 AbstractCegarLoop]: Abstraction has 3011 states and 4482 transitions. [2020-10-29 13:40:39,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4482 transitions. [2020-10-29 13:40:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:40:39,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:39,684 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] [2020-10-29 13:40:39,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:40:39,684 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:39,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1166417682, now seen corresponding path program 1 times [2020-10-29 13:40:39,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:39,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561920886] [2020-10-29 13:40:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:39,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:39,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:40:39,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:39,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-29 13:40:39,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:39,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:40:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-29 13:40:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:40:39,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:40,092 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:40,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:40,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:40,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:40,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:40,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:40,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:40:40,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:40,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:40,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:40,124 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 13:40:40,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561920886] [2020-10-29 13:40:40,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:40,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:40:40,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208649183] [2020-10-29 13:40:40,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:40:40,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:40,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:40:40,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:40:40,127 INFO L87 Difference]: Start difference. First operand 3011 states and 4482 transitions. Second operand 5 states. [2020-10-29 13:40:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:41,055 INFO L93 Difference]: Finished difference Result 6190 states and 9132 transitions. [2020-10-29 13:40:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:40:41,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-29 13:40:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:41,087 INFO L225 Difference]: With dead ends: 6190 [2020-10-29 13:40:41,087 INFO L226 Difference]: Without dead ends: 6187 [2020-10-29 13:40:41,090 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 13:40:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2020-10-29 13:40:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 3203. [2020-10-29 13:40:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3203 states. [2020-10-29 13:40:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4674 transitions. [2020-10-29 13:40:41,389 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4674 transitions. Word has length 48 [2020-10-29 13:40:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:41,390 INFO L481 AbstractCegarLoop]: Abstraction has 3203 states and 4674 transitions. [2020-10-29 13:40:41,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:40:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4674 transitions. [2020-10-29 13:40:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 13:40:41,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:41,391 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] [2020-10-29 13:40:41,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:40:41,391 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2097236675, now seen corresponding path program 1 times [2020-10-29 13:40:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:41,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426505533] [2020-10-29 13:40:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:41,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:41,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:41,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 13:40:41,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:41,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-29 13:40:41,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:41,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:41,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:41,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:40:41,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:40:41,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:41,690 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:41,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:41,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:41,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:41,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:41,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:41,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:40:41,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:41,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:41,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:41,722 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 13:40:41,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426505533] [2020-10-29 13:40:41,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:41,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:40:41,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109495421] [2020-10-29 13:40:41,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:40:41,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:41,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:40:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:40:41,726 INFO L87 Difference]: Start difference. First operand 3203 states and 4674 transitions. Second operand 4 states. [2020-10-29 13:40:41,902 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:40:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:42,509 INFO L93 Difference]: Finished difference Result 7095 states and 10340 transitions. [2020-10-29 13:40:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:40:42,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-29 13:40:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:42,531 INFO L225 Difference]: With dead ends: 7095 [2020-10-29 13:40:42,532 INFO L226 Difference]: Without dead ends: 3916 [2020-10-29 13:40:42,543 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 13:40:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2020-10-29 13:40:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3893. [2020-10-29 13:40:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3893 states. [2020-10-29 13:40:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5628 transitions. [2020-10-29 13:40:42,901 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5628 transitions. Word has length 49 [2020-10-29 13:40:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:42,902 INFO L481 AbstractCegarLoop]: Abstraction has 3893 states and 5628 transitions. [2020-10-29 13:40:42,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:40:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5628 transitions. [2020-10-29 13:40:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:40:42,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:42,905 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:40:42,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:40:42,906 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:42,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1288443405, now seen corresponding path program 1 times [2020-10-29 13:40:42,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:42,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674147921] [2020-10-29 13:40:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:42,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:43,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:43,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:45,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:45,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:40:45,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:40:45,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2405 [2020-10-29 13:40:45,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:45,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:45,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:40:45,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:40:45,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:40:45,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:45,555 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:45,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:45,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:45,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:45,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:45,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:45,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:40:45,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:45,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:45,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:45,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:45,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:45,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:40:45,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674147921] [2020-10-29 13:40:45,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:45,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:40:45,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626124487] [2020-10-29 13:40:45,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:40:45,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:45,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:40:45,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:40:45,607 INFO L87 Difference]: Start difference. First operand 3893 states and 5628 transitions. Second operand 5 states. [2020-10-29 13:40:45,810 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:40:46,500 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:40:46,702 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:40:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:47,168 INFO L93 Difference]: Finished difference Result 9754 states and 14126 transitions. [2020-10-29 13:40:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:40:47,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 13:40:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:47,203 INFO L225 Difference]: With dead ends: 9754 [2020-10-29 13:40:47,203 INFO L226 Difference]: Without dead ends: 6575 [2020-10-29 13:40:47,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:40:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2020-10-29 13:40:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 6525. [2020-10-29 13:40:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6525 states. [2020-10-29 13:40:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 9296 transitions. [2020-10-29 13:40:47,833 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 9296 transitions. Word has length 68 [2020-10-29 13:40:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:47,833 INFO L481 AbstractCegarLoop]: Abstraction has 6525 states and 9296 transitions. [2020-10-29 13:40:47,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:40:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 9296 transitions. [2020-10-29 13:40:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:40:47,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:47,837 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] [2020-10-29 13:40:47,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:40:47,837 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:47,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1643761902, now seen corresponding path program 1 times [2020-10-29 13:40:47,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:47,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303745578] [2020-10-29 13:40:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:47,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:47,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:47,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:47,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:48,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:51,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:52,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:52,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:40:52,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:40:52,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:40:52,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:52,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:52,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:40:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:40:52,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:53,107 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:53,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:53,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:53,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:53,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:53,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:53,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:40:53,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:53,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:53,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:53,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:53,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 13:40:53,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303745578] [2020-10-29 13:40:53,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:53,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:40:53,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531556769] [2020-10-29 13:40:53,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:53,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:53,142 INFO L87 Difference]: Start difference. First operand 6525 states and 9296 transitions. Second operand 6 states. [2020-10-29 13:40:53,344 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:40:54,031 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:40:54,798 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:54,980 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:40:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:55,183 INFO L93 Difference]: Finished difference Result 15323 states and 22125 transitions. [2020-10-29 13:40:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:40:55,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:40:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:55,244 INFO L225 Difference]: With dead ends: 15323 [2020-10-29 13:40:55,244 INFO L226 Difference]: Without dead ends: 12284 [2020-10-29 13:40:55,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:40:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12284 states. [2020-10-29 13:40:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12284 to 10711. [2020-10-29 13:40:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10711 states. [2020-10-29 13:40:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10711 states to 10711 states and 15272 transitions. [2020-10-29 13:40:56,242 INFO L78 Accepts]: Start accepts. Automaton has 10711 states and 15272 transitions. Word has length 68 [2020-10-29 13:40:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:56,242 INFO L481 AbstractCegarLoop]: Abstraction has 10711 states and 15272 transitions. [2020-10-29 13:40:56,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 10711 states and 15272 transitions. [2020-10-29 13:40:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:40:56,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:56,246 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] [2020-10-29 13:40:56,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:40:56,246 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:56,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:56,247 INFO L82 PathProgramCache]: Analyzing trace with hash -563246971, now seen corresponding path program 1 times [2020-10-29 13:40:56,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:56,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533583419] [2020-10-29 13:40:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:56,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:56,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:56,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:56,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:56,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:58,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:58,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:58,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:58,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:59,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:01,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:01,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:41:01,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:41:01,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:41:01,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:01,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:01,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:41:01,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:41:01,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:41:01,692 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:41:01,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:01,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:01,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:01,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:01,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:01,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:41:01,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:01,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:01,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:01,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:01,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:01,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:41:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:01,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533583419] [2020-10-29 13:41:01,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:01,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:41:01,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372356098] [2020-10-29 13:41:01,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:41:01,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:01,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:41:01,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:41:01,773 INFO L87 Difference]: Start difference. First operand 10711 states and 15272 transitions. Second operand 8 states. [2020-10-29 13:41:02,007 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:41:03,101 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:41:03,334 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:04,872 INFO L93 Difference]: Finished difference Result 36528 states and 51972 transitions. [2020-10-29 13:41:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:41:04,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-29 13:41:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:04,952 INFO L225 Difference]: With dead ends: 36528 [2020-10-29 13:41:04,952 INFO L226 Difference]: Without dead ends: 25843 [2020-10-29 13:41:04,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:41:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25843 states. [2020-10-29 13:41:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25843 to 14197. [2020-10-29 13:41:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14197 states. [2020-10-29 13:41:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14197 states to 14197 states and 19864 transitions. [2020-10-29 13:41:06,762 INFO L78 Accepts]: Start accepts. Automaton has 14197 states and 19864 transitions. Word has length 68 [2020-10-29 13:41:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:06,762 INFO L481 AbstractCegarLoop]: Abstraction has 14197 states and 19864 transitions. [2020-10-29 13:41:06,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 14197 states and 19864 transitions. [2020-10-29 13:41:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:41:06,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:06,773 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:41:06,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:41:06,774 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1570894492, now seen corresponding path program 1 times [2020-10-29 13:41:06,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:06,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680315883] [2020-10-29 13:41:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:06,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:06,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:11,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:41:11,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:41:11,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:41:11,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:11,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:11,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:11,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:41:11,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:41:11,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:12,140 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:41:12,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:12,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:12,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:12,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:12,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:12,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:41:12,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:12,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:12,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 13:41:12,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680315883] [2020-10-29 13:41:12,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:12,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:41:12,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590435223] [2020-10-29 13:41:12,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:12,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:12,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:12,174 INFO L87 Difference]: Start difference. First operand 14197 states and 19864 transitions. Second operand 6 states. [2020-10-29 13:41:12,376 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:41:12,980 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:41:13,898 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:41:14,102 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:41:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:14,408 INFO L93 Difference]: Finished difference Result 21863 states and 30544 transitions. [2020-10-29 13:41:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:41:14,409 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:41:14,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:14,463 INFO L225 Difference]: With dead ends: 21863 [2020-10-29 13:41:14,463 INFO L226 Difference]: Without dead ends: 18503 [2020-10-29 13:41:14,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:41:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18503 states. [2020-10-29 13:41:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18503 to 15928. [2020-10-29 13:41:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15928 states. [2020-10-29 13:41:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 22255 transitions. [2020-10-29 13:41:16,158 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 22255 transitions. Word has length 68 [2020-10-29 13:41:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:16,158 INFO L481 AbstractCegarLoop]: Abstraction has 15928 states and 22255 transitions. [2020-10-29 13:41:16,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 22255 transitions. [2020-10-29 13:41:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:41:16,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:16,164 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:41:16,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:41:16,164 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1247391026, now seen corresponding path program 1 times [2020-10-29 13:41:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:16,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450332940] [2020-10-29 13:41:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:16,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:16,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:16,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:16,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:17,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:17,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:17,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:21,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:21,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:41:21,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:41:21,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:41:21,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:21,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:41:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:41:21,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:21,400 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:41:21,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:21,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:21,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:21,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:21,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:21,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:41:21,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:21,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:21,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:41:21,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450332940] [2020-10-29 13:41:21,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:21,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:41:21,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830322343] [2020-10-29 13:41:21,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:21,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:21,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:21,439 INFO L87 Difference]: Start difference. First operand 15928 states and 22255 transitions. Second operand 6 states. [2020-10-29 13:41:21,642 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:41:22,456 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:41:23,461 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:41:23,679 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:41:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:24,039 INFO L93 Difference]: Finished difference Result 25439 states and 35654 transitions. [2020-10-29 13:41:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:41:24,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:41:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:24,083 INFO L225 Difference]: With dead ends: 25439 [2020-10-29 13:41:24,083 INFO L226 Difference]: Without dead ends: 20366 [2020-10-29 13:41:24,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:41:24,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20366 states. [2020-10-29 13:41:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20366 to 17073. [2020-10-29 13:41:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17073 states. [2020-10-29 13:41:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17073 states to 17073 states and 23807 transitions. [2020-10-29 13:41:25,960 INFO L78 Accepts]: Start accepts. Automaton has 17073 states and 23807 transitions. Word has length 69 [2020-10-29 13:41:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:25,961 INFO L481 AbstractCegarLoop]: Abstraction has 17073 states and 23807 transitions. [2020-10-29 13:41:25,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 17073 states and 23807 transitions. [2020-10-29 13:41:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:41:25,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:25,966 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:41:25,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:41:25,966 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:25,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:25,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2053794855, now seen corresponding path program 1 times [2020-10-29 13:41:25,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:25,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871522739] [2020-10-29 13:41:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:25,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:28,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:29,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:30,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:41:30,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:41:30,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:41:30,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:30,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:30,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:41:30,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:30,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:41:30,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:31,255 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:41:31,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:31,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:31,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:31,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:31,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:31,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:41:31,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:31,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:31,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:31,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:31,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871522739] [2020-10-29 13:41:31,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:31,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:41:31,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163470703] [2020-10-29 13:41:31,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:41:31,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:31,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:41:31,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:41:31,307 INFO L87 Difference]: Start difference. First operand 17073 states and 23807 transitions. Second operand 8 states. [2020-10-29 13:41:31,524 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:41:32,840 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:41:33,112 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:41:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:35,741 INFO L93 Difference]: Finished difference Result 48408 states and 67434 transitions. [2020-10-29 13:41:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:41:35,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:41:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:35,822 INFO L225 Difference]: With dead ends: 48408 [2020-10-29 13:41:35,822 INFO L226 Difference]: Without dead ends: 40625 [2020-10-29 13:41:35,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:41:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40625 states. [2020-10-29 13:41:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40625 to 23126. [2020-10-29 13:41:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23126 states. [2020-10-29 13:41:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23126 states to 23126 states and 32486 transitions. [2020-10-29 13:41:38,305 INFO L78 Accepts]: Start accepts. Automaton has 23126 states and 32486 transitions. Word has length 71 [2020-10-29 13:41:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:38,306 INFO L481 AbstractCegarLoop]: Abstraction has 23126 states and 32486 transitions. [2020-10-29 13:41:38,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 23126 states and 32486 transitions. [2020-10-29 13:41:38,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:41:38,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:38,313 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:41:38,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:41:38,313 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1261275325, now seen corresponding path program 1 times [2020-10-29 13:41:38,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:38,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650648154] [2020-10-29 13:41:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:38,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:43,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:43,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:41:43,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:41:43,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-29 13:41:43,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:43,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:43,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:41:43,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:43,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:41:43,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:43,673 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:41:43,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:43,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:43,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:43,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:43,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:43,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:41:43,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:43,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:43,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:41:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:43,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650648154] [2020-10-29 13:41:43,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:43,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:41:43,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002452221] [2020-10-29 13:41:43,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:41:43,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:43,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:41:43,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:41:43,751 INFO L87 Difference]: Start difference. First operand 23126 states and 32486 transitions. Second operand 8 states. [2020-10-29 13:41:43,982 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:41:45,087 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:45,403 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:41:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:48,261 INFO L93 Difference]: Finished difference Result 56503 states and 78844 transitions. [2020-10-29 13:41:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:41:48,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-29 13:41:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:48,342 INFO L225 Difference]: With dead ends: 56503 [2020-10-29 13:41:48,342 INFO L226 Difference]: Without dead ends: 33403 [2020-10-29 13:41:48,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:41:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33403 states. [2020-10-29 13:41:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33403 to 23263. [2020-10-29 13:41:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23263 states. [2020-10-29 13:41:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23263 states to 23263 states and 31999 transitions. [2020-10-29 13:41:51,071 INFO L78 Accepts]: Start accepts. Automaton has 23263 states and 31999 transitions. Word has length 72 [2020-10-29 13:41:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:51,071 INFO L481 AbstractCegarLoop]: Abstraction has 23263 states and 31999 transitions. [2020-10-29 13:41:51,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 23263 states and 31999 transitions. [2020-10-29 13:41:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:41:51,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:51,078 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] [2020-10-29 13:41:51,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:41:51,078 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1481098923, now seen corresponding path program 1 times [2020-10-29 13:41:51,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:51,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361053940] [2020-10-29 13:41:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:51,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:52,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:52,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:53,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:55,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:56,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:56,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:41:56,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:41:56,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:41:56,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:56,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:41:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:41:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:41:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:56,564 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:41:56,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:56,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:56,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:56,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:56,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:56,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:41:56,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:56,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:56,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:56,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:56,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:56,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:56,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361053940] [2020-10-29 13:41:56,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:56,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:41:56,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845157512] [2020-10-29 13:41:56,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:41:56,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:56,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:41:56,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:41:56,614 INFO L87 Difference]: Start difference. First operand 23263 states and 31999 transitions. Second operand 10 states. [2020-10-29 13:41:56,825 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:41:59,922 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-29 13:42:00,670 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:42:01,026 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:42:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:10,794 INFO L93 Difference]: Finished difference Result 100965 states and 137917 transitions. [2020-10-29 13:42:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:42:10,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-29 13:42:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:10,939 INFO L225 Difference]: With dead ends: 100965 [2020-10-29 13:42:10,939 INFO L226 Difference]: Without dead ends: 90082 [2020-10-29 13:42:11,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-10-29 13:42:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90082 states. [2020-10-29 13:42:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90082 to 41149. [2020-10-29 13:42:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41149 states. [2020-10-29 13:42:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41149 states to 41149 states and 56637 transitions. [2020-10-29 13:42:16,682 INFO L78 Accepts]: Start accepts. Automaton has 41149 states and 56637 transitions. Word has length 73 [2020-10-29 13:42:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:16,682 INFO L481 AbstractCegarLoop]: Abstraction has 41149 states and 56637 transitions. [2020-10-29 13:42:16,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:42:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 41149 states and 56637 transitions. [2020-10-29 13:42:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:42:16,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:16,691 INFO L422 BasicCegarLoop]: trace histogram [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 13:42:16,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:42:16,691 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash -473405470, now seen corresponding path program 1 times [2020-10-29 13:42:16,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:16,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436349926] [2020-10-29 13:42:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:16,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:16,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:16,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:16,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:17,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:17,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:17,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:18,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:18,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:18,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:18,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:18,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:19,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:20,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:21,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:21,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:42:21,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:42:21,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:42:21,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:21,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:21,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:42:21,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:42:21,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:42:21,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:22,002 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:42:22,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:22,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:22,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:22,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:22,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:42:22,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:22,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:22,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:42:22,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:22,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436349926] [2020-10-29 13:42:22,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:42:22,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:42:22,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196538592] [2020-10-29 13:42:22,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:42:22,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:22,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:42:22,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:22,073 INFO L87 Difference]: Start difference. First operand 41149 states and 56637 transitions. Second operand 9 states. [2020-10-29 13:42:22,274 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:42:24,665 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:42:25,342 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:42:43,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:43,890 INFO L93 Difference]: Finished difference Result 182425 states and 248324 transitions. [2020-10-29 13:42:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:42:43,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-29 13:42:43,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:44,302 INFO L225 Difference]: With dead ends: 182425 [2020-10-29 13:42:44,302 INFO L226 Difference]: Without dead ends: 145169 [2020-10-29 13:42:44,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:42:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145169 states. [2020-10-29 13:42:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145169 to 46407. [2020-10-29 13:42:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46407 states. [2020-10-29 13:42:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46407 states to 46407 states and 63678 transitions. [2020-10-29 13:42:52,061 INFO L78 Accepts]: Start accepts. Automaton has 46407 states and 63678 transitions. Word has length 74 [2020-10-29 13:42:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:52,061 INFO L481 AbstractCegarLoop]: Abstraction has 46407 states and 63678 transitions. [2020-10-29 13:42:52,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:42:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 46407 states and 63678 transitions. [2020-10-29 13:42:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:42:52,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:52,070 INFO L422 BasicCegarLoop]: trace histogram [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 13:42:52,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:42:52,070 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash 792425095, now seen corresponding path program 1 times [2020-10-29 13:42:52,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:52,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277624990] [2020-10-29 13:42:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:52,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:52,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:52,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:53,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:56,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:56,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:42:56,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:56,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4168 [2020-10-29 13:42:56,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:56,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:56,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:42:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:42:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:42:56,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:56,692 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:42:56,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:56,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:56,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:56,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:56,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:56,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:42:56,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:56,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:56,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:56,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:56,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:56,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:56,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277624990] [2020-10-29 13:42:56,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:42:56,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:42:56,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806201695] [2020-10-29 13:42:56,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:42:56,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:56,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:42:56,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:42:56,727 INFO L87 Difference]: Start difference. First operand 46407 states and 63678 transitions. Second operand 10 states. [2020-10-29 13:42:56,961 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:43:00,158 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-29 13:43:04,901 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:43:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:28,793 INFO L93 Difference]: Finished difference Result 215969 states and 294664 transitions. [2020-10-29 13:43:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:43:28,793 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-29 13:43:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:29,163 INFO L225 Difference]: With dead ends: 215969 [2020-10-29 13:43:29,163 INFO L226 Difference]: Without dead ends: 169588 [2020-10-29 13:43:29,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:43:29,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169588 states. [2020-10-29 13:43:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169588 to 83233. [2020-10-29 13:43:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83233 states. [2020-10-29 13:43:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83233 states to 83233 states and 114021 transitions. [2020-10-29 13:43:44,347 INFO L78 Accepts]: Start accepts. Automaton has 83233 states and 114021 transitions. Word has length 74 [2020-10-29 13:43:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:44,347 INFO L481 AbstractCegarLoop]: Abstraction has 83233 states and 114021 transitions. [2020-10-29 13:43:44,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:43:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 83233 states and 114021 transitions. [2020-10-29 13:43:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:43:44,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:44,355 INFO L422 BasicCegarLoop]: trace histogram [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 13:43:44,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:43:44,355 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:44,355 INFO L82 PathProgramCache]: Analyzing trace with hash -886153259, now seen corresponding path program 1 times [2020-10-29 13:43:44,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:44,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792094086] [2020-10-29 13:43:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:44,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:44,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:44,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:44,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:44,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:48,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:48,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:43:48,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:43:48,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4193 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:49,103 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:43:49,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:49,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:49,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:49,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:49,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:49,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:43:49,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:49,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:49,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:49,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792094086] [2020-10-29 13:43:49,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:43:49,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:43:49,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293709236] [2020-10-29 13:43:49,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:43:49,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:49,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:43:49,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:43:49,146 INFO L87 Difference]: Start difference. First operand 83233 states and 114021 transitions. Second operand 10 states. [2020-10-29 13:43:49,723 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 148 [2020-10-29 13:43:52,828 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:43:53,578 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 145