/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:44:01,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:44:01,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:44:01,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:44:01,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:44:01,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:44:01,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:44:01,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:44:01,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:44:01,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:44:01,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:44:01,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:44:01,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:44:01,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:44:01,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:44:01,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:44:01,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:44:01,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:44:01,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:44:01,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:44:01,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:44:01,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:44:01,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:44:01,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:44:01,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:44:01,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:44:01,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:44:01,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:44:01,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:44:01,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:44:01,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:44:01,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:44:01,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:44:01,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:44:01,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:44:01,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:44:01,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:44:01,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:44:01,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:44:01,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:44:01,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:44:01,438 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 13:44:01,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:44:01,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:44:01,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:44:01,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:44:01,468 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:44:01,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:44:01,469 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:44:01,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:44:01,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:44:01,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:44:01,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:44:01,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:44:01,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:44:01,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:44:01,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:44:01,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:44:01,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:44:01,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:44:01,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:44:01,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:44:01,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:44:01,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:44:01,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:44:01,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:44:01,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:44:01,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:44:01,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:44:01,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:44:01,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:44:01,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:44:01,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:44:01,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:44:01,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:44:01,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:44:01,873 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:44:01,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:44:01,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/430bba9d2/b6bc6b34d7f64f6cbf7cb14cc8e504ce/FLAGd690b825a [2020-10-29 13:44:02,908 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:44:02,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:44:02,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/430bba9d2/b6bc6b34d7f64f6cbf7cb14cc8e504ce/FLAGd690b825a [2020-10-29 13:44:03,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/430bba9d2/b6bc6b34d7f64f6cbf7cb14cc8e504ce [2020-10-29 13:44:03,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:44:03,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:44:03,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:44:03,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:44:03,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:44:03,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:44:03" (1/1) ... [2020-10-29 13:44:03,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141ad5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:03, skipping insertion in model container [2020-10-29 13:44:03,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:44:03" (1/1) ... [2020-10-29 13:44:03,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:44:03,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:44:04,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:44:04,253 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:44:04,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:44:04,526 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:44:04,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04 WrapperNode [2020-10-29 13:44:04,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:44:04,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:44:04,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:44:04,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:44:04,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04" (1/1) ... [2020-10-29 13:44:04,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04" (1/1) ... [2020-10-29 13:44:04,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04" (1/1) ... [2020-10-29 13:44:04,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04" (1/1) ... [2020-10-29 13:44:04,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04" (1/1) ... [2020-10-29 13:44:04,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04" (1/1) ... [2020-10-29 13:44:04,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04" (1/1) ... [2020-10-29 13:44:04,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:44:04,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:44:04,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:44:04,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:44:04,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04" (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 13:44:04,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:44:04,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:44:04,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:44:04,849 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:44:04,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:44:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:44:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:44:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:44:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:44:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:44:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:44:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:44:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:44:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:44:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:44:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:44:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:44:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:44:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:44:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:44:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:44:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:44:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:44:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:44:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:44:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:44:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:44:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:44:07,460 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:44:07,461 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:44:07,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:44:07 BoogieIcfgContainer [2020-10-29 13:44:07,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:44:07,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:44:07,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:44:07,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:44:07,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:44:03" (1/3) ... [2020-10-29 13:44:07,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad66426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:44:07, skipping insertion in model container [2020-10-29 13:44:07,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:04" (2/3) ... [2020-10-29 13:44:07,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad66426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:44:07, skipping insertion in model container [2020-10-29 13:44:07,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:44:07" (3/3) ... [2020-10-29 13:44:07,477 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:44:07,489 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:44:07,495 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:44:07,509 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:44:07,556 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:44:07,556 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:44:07,556 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:44:07,556 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:44:07,557 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:44:07,557 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:44:07,557 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:44:07,557 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:44:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states. [2020-10-29 13:44:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:44:07,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:07,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:07,636 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2133721457, now seen corresponding path program 1 times [2020-10-29 13:44:07,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:07,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667718651] [2020-10-29 13:44:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:08,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:08,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:08,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:08,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:09,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:10,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:13,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:13,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:44:13,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:44:13,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-29 13:44:13,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:13,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:13,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:13,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:13,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:44:13,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:44:14,222 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:44:14,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:14,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:14,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:14,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:14,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:14,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-29 13:44:14,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:14,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:14,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:14,369 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 13:44:14,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667718651] [2020-10-29 13:44:14,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:14,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:14,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308118507] [2020-10-29 13:44:14,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:14,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:14,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:14,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:14,402 INFO L87 Difference]: Start difference. First operand 714 states. Second operand 6 states. [2020-10-29 13:44:15,532 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:44:21,118 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-29 13:44:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:21,697 INFO L93 Difference]: Finished difference Result 1231 states and 2138 transitions. [2020-10-29 13:44:21,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:21,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:44:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:21,742 INFO L225 Difference]: With dead ends: 1231 [2020-10-29 13:44:21,743 INFO L226 Difference]: Without dead ends: 702 [2020-10-29 13:44:21,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:44:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-10-29 13:44:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 699. [2020-10-29 13:44:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2020-10-29 13:44:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 963 transitions. [2020-10-29 13:44:21,868 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 963 transitions. Word has length 68 [2020-10-29 13:44:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:21,869 INFO L481 AbstractCegarLoop]: Abstraction has 699 states and 963 transitions. [2020-10-29 13:44:21,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 963 transitions. [2020-10-29 13:44:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:44:21,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:21,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:21,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:44:21,874 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:21,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1127228090, now seen corresponding path program 1 times [2020-10-29 13:44:21,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:21,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140285753] [2020-10-29 13:44:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:21,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:22,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:22,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:22,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:22,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:23,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:26,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:26,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:44:26,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:44:26,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:44:26,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:26,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:26,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:44:26,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:44:27,989 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:44:27,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:28,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:28,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:28,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:28,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:28,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 13:44:28,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:28,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:28,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:28,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:28,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:28,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:28,093 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 13:44:28,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140285753] [2020-10-29 13:44:28,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:28,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:28,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026825896] [2020-10-29 13:44:28,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:28,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:28,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:28,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:28,100 INFO L87 Difference]: Start difference. First operand 699 states and 963 transitions. Second operand 6 states. [2020-10-29 13:44:29,125 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:44:32,764 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-29 13:44:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:33,395 INFO L93 Difference]: Finished difference Result 1361 states and 1934 transitions. [2020-10-29 13:44:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:33,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:44:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:33,403 INFO L225 Difference]: With dead ends: 1361 [2020-10-29 13:44:33,403 INFO L226 Difference]: Without dead ends: 873 [2020-10-29 13:44:33,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:44:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2020-10-29 13:44:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 869. [2020-10-29 13:44:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 869 states. [2020-10-29 13:44:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1221 transitions. [2020-10-29 13:44:33,471 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1221 transitions. Word has length 69 [2020-10-29 13:44:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:33,471 INFO L481 AbstractCegarLoop]: Abstraction has 869 states and 1221 transitions. [2020-10-29 13:44:33,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1221 transitions. [2020-10-29 13:44:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:44:33,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:33,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:33,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:44:33,475 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:33,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1429237011, now seen corresponding path program 1 times [2020-10-29 13:44:33,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:33,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692497182] [2020-10-29 13:44:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:33,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:33,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:33,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:34,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:35,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:36,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:38,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:38,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:44:38,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:44:38,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 13:44:38,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:38,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:38,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:44:38,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:38,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:44:38,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:39,623 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:44:39,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:39,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:39,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:39,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:39,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:39,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 13:44:39,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:39,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:39,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:39,762 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 13:44:39,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692497182] [2020-10-29 13:44:39,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:39,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:44:39,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872911502] [2020-10-29 13:44:39,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:44:39,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:39,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:44:39,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:44:39,766 INFO L87 Difference]: Start difference. First operand 869 states and 1221 transitions. Second operand 8 states. [2020-10-29 13:44:40,714 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:44:44,651 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 13:44:46,973 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-29 13:44:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:47,229 INFO L93 Difference]: Finished difference Result 3136 states and 4689 transitions. [2020-10-29 13:44:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:44:47,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:44:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:47,251 INFO L225 Difference]: With dead ends: 3136 [2020-10-29 13:44:47,252 INFO L226 Difference]: Without dead ends: 2693 [2020-10-29 13:44:47,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:44:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2020-10-29 13:44:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 878. [2020-10-29 13:44:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-10-29 13:44:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1230 transitions. [2020-10-29 13:44:47,359 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1230 transitions. Word has length 69 [2020-10-29 13:44:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:47,360 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1230 transitions. [2020-10-29 13:44:47,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:44:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1230 transitions. [2020-10-29 13:44:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:44:47,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:47,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:47,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:44:47,365 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:47,366 INFO L82 PathProgramCache]: Analyzing trace with hash -34201178, now seen corresponding path program 1 times [2020-10-29 13:44:47,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:47,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205222621] [2020-10-29 13:44:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:47,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:47,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:47,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:48,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:48,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:48,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:52,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:52,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:44:52,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:44:52,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:44:52,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:52,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:44:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:44:52,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:53,536 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:44:53,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:53,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:53,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:53,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:53,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:44:53,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:53,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:53,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:53,635 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 13:44:53,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205222621] [2020-10-29 13:44:53,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:53,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:44:53,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384364118] [2020-10-29 13:44:53,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:44:53,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:53,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:44:53,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:44:53,638 INFO L87 Difference]: Start difference. First operand 878 states and 1230 transitions. Second operand 8 states. [2020-10-29 13:44:54,496 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:44:58,518 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 13:45:00,737 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-29 13:45:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:01,002 INFO L93 Difference]: Finished difference Result 2494 states and 3676 transitions. [2020-10-29 13:45:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:45:01,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:45:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:01,019 INFO L225 Difference]: With dead ends: 2494 [2020-10-29 13:45:01,019 INFO L226 Difference]: Without dead ends: 2161 [2020-10-29 13:45:01,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2020-10-29 13:45:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 912. [2020-10-29 13:45:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 912 states. [2020-10-29 13:45:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1276 transitions. [2020-10-29 13:45:01,126 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1276 transitions. Word has length 70 [2020-10-29 13:45:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:01,126 INFO L481 AbstractCegarLoop]: Abstraction has 912 states and 1276 transitions. [2020-10-29 13:45:01,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:45:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1276 transitions. [2020-10-29 13:45:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:45:01,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:01,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:01,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:45:01,130 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:01,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:01,130 INFO L82 PathProgramCache]: Analyzing trace with hash 935281942, now seen corresponding path program 1 times [2020-10-29 13:45:01,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:01,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311908292] [2020-10-29 13:45:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:01,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:03,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:06,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:06,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:45:06,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:45:06,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:45:06,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:06,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:06,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:45:06,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:45:06,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:45:06,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:07,310 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:45:07,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:07,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:07,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:07,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:07,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:07,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-29 13:45:07,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:07,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:45:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:45:07,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:07,422 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 13:45:07,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311908292] [2020-10-29 13:45:07,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:07,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:07,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940856919] [2020-10-29 13:45:07,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:45:07,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:07,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:45:07,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:07,425 INFO L87 Difference]: Start difference. First operand 912 states and 1276 transitions. Second operand 8 states. [2020-10-29 13:45:08,403 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:45:12,150 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 13:45:14,342 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-29 13:45:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:14,639 INFO L93 Difference]: Finished difference Result 2771 states and 4061 transitions. [2020-10-29 13:45:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:45:14,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:45:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:14,653 INFO L225 Difference]: With dead ends: 2771 [2020-10-29 13:45:14,653 INFO L226 Difference]: Without dead ends: 2424 [2020-10-29 13:45:14,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2020-10-29 13:45:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 952. [2020-10-29 13:45:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2020-10-29 13:45:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1332 transitions. [2020-10-29 13:45:14,750 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1332 transitions. Word has length 70 [2020-10-29 13:45:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:14,750 INFO L481 AbstractCegarLoop]: Abstraction has 952 states and 1332 transitions. [2020-10-29 13:45:14,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:45:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1332 transitions. [2020-10-29 13:45:14,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:45:14,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:14,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:14,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:45:14,753 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1146293205, now seen corresponding path program 1 times [2020-10-29 13:45:14,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:14,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450642289] [2020-10-29 13:45:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:14,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:14,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:14,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:15,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:15,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:16,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:16,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:16,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:19,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:19,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:45:19,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:45:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:45:19,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:19,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:45:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:45:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:45:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:20,918 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:45:20,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:20,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:20,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:20,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:20,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:20,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 13:45:20,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:20,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:20,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:45:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:45:20,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:21,015 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 13:45:21,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450642289] [2020-10-29 13:45:21,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:21,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:21,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912922339] [2020-10-29 13:45:21,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:45:21,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:21,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:45:21,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:21,017 INFO L87 Difference]: Start difference. First operand 952 states and 1332 transitions. Second operand 8 states. [2020-10-29 13:45:22,013 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-29 13:45:25,944 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-29 13:45:27,687 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:45:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:27,911 INFO L93 Difference]: Finished difference Result 3208 states and 4654 transitions. [2020-10-29 13:45:27,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:45:27,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:45:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:27,926 INFO L225 Difference]: With dead ends: 3208 [2020-10-29 13:45:27,926 INFO L226 Difference]: Without dead ends: 2739 [2020-10-29 13:45:27,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2020-10-29 13:45:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 946. [2020-10-29 13:45:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 946 states. [2020-10-29 13:45:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1318 transitions. [2020-10-29 13:45:28,033 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1318 transitions. Word has length 70 [2020-10-29 13:45:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:28,033 INFO L481 AbstractCegarLoop]: Abstraction has 946 states and 1318 transitions. [2020-10-29 13:45:28,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:45:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1318 transitions. [2020-10-29 13:45:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:45:28,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:28,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:28,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:45:28,036 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash -23313213, now seen corresponding path program 1 times [2020-10-29 13:45:28,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:28,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122614991] [2020-10-29 13:45:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:28,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:29,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:29,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:33,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:33,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:45:33,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:45:33,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:45:33,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:33,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:33,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:45:33,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:45:33,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:45:33,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:34,089 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:45:34,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:34,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:34,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:34,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:34,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-29 13:45:34,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:34,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:45:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:45:34,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:34,207 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 13:45:34,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122614991] [2020-10-29 13:45:34,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:34,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:34,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090760887] [2020-10-29 13:45:34,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:45:34,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:34,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:45:34,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:34,210 INFO L87 Difference]: Start difference. First operand 946 states and 1318 transitions. Second operand 8 states. [2020-10-29 13:45:35,181 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:45:38,899 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2020-10-29 13:45:40,684 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:45:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:40,860 INFO L93 Difference]: Finished difference Result 2532 states and 3637 transitions. [2020-10-29 13:45:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:45:40,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:45:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:40,871 INFO L225 Difference]: With dead ends: 2532 [2020-10-29 13:45:40,871 INFO L226 Difference]: Without dead ends: 2093 [2020-10-29 13:45:40,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:45:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2020-10-29 13:45:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 988. [2020-10-29 13:45:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-10-29 13:45:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1378 transitions. [2020-10-29 13:45:40,984 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1378 transitions. Word has length 70 [2020-10-29 13:45:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:40,984 INFO L481 AbstractCegarLoop]: Abstraction has 988 states and 1378 transitions. [2020-10-29 13:45:40,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:45:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1378 transitions. [2020-10-29 13:45:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:45:40,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:40,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:40,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:45:40,987 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:40,988 INFO L82 PathProgramCache]: Analyzing trace with hash 655022603, now seen corresponding path program 1 times [2020-10-29 13:45:40,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:40,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560064704] [2020-10-29 13:45:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:42,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:43,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:44,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:46,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:46,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:45:46,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:45:46,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:45:46,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:46,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:46,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:45:46,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:45:46,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:45:46,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:47,024 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:45:47,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:47,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:47,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:47,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:47,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:45:47,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:47,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:45:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:45:47,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:47,085 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 13:45:47,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560064704] [2020-10-29 13:45:47,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:47,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:47,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149018375] [2020-10-29 13:45:47,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:45:47,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:47,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:45:47,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:47,087 INFO L87 Difference]: Start difference. First operand 988 states and 1378 transitions. Second operand 8 states. [2020-10-29 13:45:48,095 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:45:51,796 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2020-10-29 13:45:53,614 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:45:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:53,822 INFO L93 Difference]: Finished difference Result 2861 states and 4147 transitions. [2020-10-29 13:45:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:45:53,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:45:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:53,834 INFO L225 Difference]: With dead ends: 2861 [2020-10-29 13:45:53,834 INFO L226 Difference]: Without dead ends: 2528 [2020-10-29 13:45:53,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:45:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2020-10-29 13:45:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 998. [2020-10-29 13:45:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2020-10-29 13:45:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1390 transitions. [2020-10-29 13:45:53,961 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1390 transitions. Word has length 71 [2020-10-29 13:45:53,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:53,961 INFO L481 AbstractCegarLoop]: Abstraction has 998 states and 1390 transitions. [2020-10-29 13:45:53,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:45:53,961 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1390 transitions. [2020-10-29 13:45:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:45:53,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:53,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:53,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:45:53,964 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1714241548, now seen corresponding path program 1 times [2020-10-29 13:45:53,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:53,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895405519] [2020-10-29 13:45:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:54,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:54,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:54,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:54,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:55,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:55,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:55,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:55,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:59,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:59,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:45:59,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:45:59,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:45:59,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:59,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:59,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:45:59,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:45:59,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:45:59,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:00,081 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:46:00,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:00,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:00,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:00,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:00,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:00,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:46:00,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:00,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:00,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:46:00,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:00,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:46:00,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:46:00,149 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 13:46:00,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895405519] [2020-10-29 13:46:00,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:00,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:46:00,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165750281] [2020-10-29 13:46:00,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:46:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:46:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:46:00,153 INFO L87 Difference]: Start difference. First operand 998 states and 1390 transitions. Second operand 9 states. [2020-10-29 13:46:01,163 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:46:06,225 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:46:07,323 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-29 13:46:10,383 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:46:11,344 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-29 13:46:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:12,336 INFO L93 Difference]: Finished difference Result 9996 states and 14645 transitions. [2020-10-29 13:46:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 13:46:12,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:46:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:12,374 INFO L225 Difference]: With dead ends: 9996 [2020-10-29 13:46:12,375 INFO L226 Difference]: Without dead ends: 9517 [2020-10-29 13:46:12,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=282, Invalid=1200, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 13:46:12,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2020-10-29 13:46:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 1141. [2020-10-29 13:46:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1141 states. [2020-10-29 13:46:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1575 transitions. [2020-10-29 13:46:12,605 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1575 transitions. Word has length 72 [2020-10-29 13:46:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:12,605 INFO L481 AbstractCegarLoop]: Abstraction has 1141 states and 1575 transitions. [2020-10-29 13:46:12,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:46:12,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1575 transitions. [2020-10-29 13:46:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:46:12,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:12,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:12,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:46:12,609 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1453660329, now seen corresponding path program 1 times [2020-10-29 13:46:12,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:12,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363608794] [2020-10-29 13:46:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:12,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:12,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:13,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:13,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:14,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:15,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:15,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:46:15,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:46:15,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2998 [2020-10-29 13:46:15,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:15,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:46:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:46:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:46:15,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:16,860 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:46:16,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:16,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:16,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:16,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:16,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:16,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:46:16,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:16,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:46:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:46:16,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:16,919 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 13:46:16,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363608794] [2020-10-29 13:46:16,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:16,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:46:16,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681543694] [2020-10-29 13:46:16,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:46:16,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:16,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:46:16,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:46:16,922 INFO L87 Difference]: Start difference. First operand 1141 states and 1575 transitions. Second operand 9 states. [2020-10-29 13:46:17,982 WARN L193 SmtUtils]: Spent 979.00 ms on a formula simplification that was a NOOP. DAG size: 371 [2020-10-29 13:46:22,435 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification that was a NOOP. DAG size: 369 [2020-10-29 13:46:23,911 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification that was a NOOP. DAG size: 367 [2020-10-29 13:46:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:25,368 INFO L93 Difference]: Finished difference Result 3135 states and 4528 transitions. [2020-10-29 13:46:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:46:25,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:46:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:25,384 INFO L225 Difference]: With dead ends: 3135 [2020-10-29 13:46:25,384 INFO L226 Difference]: Without dead ends: 2802 [2020-10-29 13:46:25,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:46:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2020-10-29 13:46:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 1018. [2020-10-29 13:46:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1018 states. [2020-10-29 13:46:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1395 transitions. [2020-10-29 13:46:25,576 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1395 transitions. Word has length 72 [2020-10-29 13:46:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:25,577 INFO L481 AbstractCegarLoop]: Abstraction has 1018 states and 1395 transitions. [2020-10-29 13:46:25,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:46:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1395 transitions. [2020-10-29 13:46:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:46:25,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:25,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:25,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:46:25,580 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2135185807, now seen corresponding path program 1 times [2020-10-29 13:46:25,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:25,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589169925] [2020-10-29 13:46:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:25,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:25,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:25,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:26,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:26,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:26,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:26,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:29,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:29,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:29,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:29,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:30,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:30,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:46:30,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:46:30,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:46:30,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:30,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:30,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:46:30,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:30,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:46:30,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:31,716 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:46:31,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:31,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:31,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:31,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:31,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:31,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:46:31,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:31,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:31,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:31,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:31,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:31,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:31,781 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 13:46:31,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589169925] [2020-10-29 13:46:31,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:31,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:31,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288896111] [2020-10-29 13:46:31,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:46:31,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:31,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:46:31,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:46:31,783 INFO L87 Difference]: Start difference. First operand 1018 states and 1395 transitions. Second operand 8 states. [2020-10-29 13:46:32,724 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:46:36,397 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 13:46:38,699 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-29 13:46:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:39,182 INFO L93 Difference]: Finished difference Result 2903 states and 4181 transitions. [2020-10-29 13:46:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:46:39,183 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-29 13:46:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:39,188 INFO L225 Difference]: With dead ends: 2903 [2020-10-29 13:46:39,188 INFO L226 Difference]: Without dead ends: 2524 [2020-10-29 13:46:39,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:46:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2020-10-29 13:46:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1046. [2020-10-29 13:46:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2020-10-29 13:46:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1435 transitions. [2020-10-29 13:46:39,390 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1435 transitions. Word has length 72 [2020-10-29 13:46:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:39,390 INFO L481 AbstractCegarLoop]: Abstraction has 1046 states and 1435 transitions. [2020-10-29 13:46:39,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:46:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1435 transitions. [2020-10-29 13:46:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:46:39,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:39,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:39,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:46:39,393 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:39,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1948770226, now seen corresponding path program 1 times [2020-10-29 13:46:39,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:39,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192172888] [2020-10-29 13:46:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:39,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:39,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:39,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:39,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:39,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:40,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:40,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:40,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:44,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:44,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:46:44,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:46:44,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:46:44,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:44,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:44,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:46:44,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:44,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:46:44,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:45,381 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:46:45,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:45,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:45,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:45,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:45,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:45,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:46:45,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:45,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:45,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:45,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:45,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:45,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:45,438 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 13:46:45,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192172888] [2020-10-29 13:46:45,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:45,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:46:45,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529114489] [2020-10-29 13:46:45,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:46:45,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:46:45,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:46:45,440 INFO L87 Difference]: Start difference. First operand 1046 states and 1435 transitions. Second operand 6 states. [2020-10-29 13:46:46,431 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:46:49,910 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-29 13:46:50,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:50,490 INFO L93 Difference]: Finished difference Result 2139 states and 2969 transitions. [2020-10-29 13:46:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:46:50,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:46:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:50,493 INFO L225 Difference]: With dead ends: 2139 [2020-10-29 13:46:50,493 INFO L226 Difference]: Without dead ends: 1407 [2020-10-29 13:46:50,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:46:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2020-10-29 13:46:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1403. [2020-10-29 13:46:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1403 states. [2020-10-29 13:46:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1902 transitions. [2020-10-29 13:46:50,780 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1902 transitions. Word has length 72 [2020-10-29 13:46:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:50,781 INFO L481 AbstractCegarLoop]: Abstraction has 1403 states and 1902 transitions. [2020-10-29 13:46:50,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:46:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1902 transitions. [2020-10-29 13:46:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:46:50,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:50,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:50,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:46:50,784 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1429196848, now seen corresponding path program 1 times [2020-10-29 13:46:50,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:50,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381197859] [2020-10-29 13:46:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:50,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:50,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:50,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:51,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:53,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:55,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:55,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:46:55,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:46:55,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:46:55,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:55,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:46:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:46:55,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:56,905 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:46:56,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:56,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:56,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:56,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:56,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:56,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-29 13:46:56,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:56,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:56,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:56,993 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 13:46:56,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381197859] [2020-10-29 13:46:56,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:56,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:56,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064842575] [2020-10-29 13:46:56,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:46:56,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:56,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:46:56,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:46:56,995 INFO L87 Difference]: Start difference. First operand 1403 states and 1902 transitions. Second operand 8 states. [2020-10-29 13:46:58,005 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:47:01,653 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 13:47:03,909 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-29 13:47:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:04,585 INFO L93 Difference]: Finished difference Result 4549 states and 6501 transitions. [2020-10-29 13:47:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:47:04,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-29 13:47:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:04,594 INFO L225 Difference]: With dead ends: 4549 [2020-10-29 13:47:04,595 INFO L226 Difference]: Without dead ends: 3912 [2020-10-29 13:47:04,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:47:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2020-10-29 13:47:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 1459. [2020-10-29 13:47:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1459 states. [2020-10-29 13:47:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 1984 transitions. [2020-10-29 13:47:04,967 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 1984 transitions. Word has length 73 [2020-10-29 13:47:04,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:04,967 INFO L481 AbstractCegarLoop]: Abstraction has 1459 states and 1984 transitions. [2020-10-29 13:47:04,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:47:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 1984 transitions. [2020-10-29 13:47:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:47:04,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:04,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:04,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:47:04,971 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:04,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:04,971 INFO L82 PathProgramCache]: Analyzing trace with hash 346960344, now seen corresponding path program 1 times [2020-10-29 13:47:04,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:04,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610866578] [2020-10-29 13:47:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:05,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:05,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:06,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:06,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:06,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:07,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:08,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:10,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:10,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:47:10,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:47:10,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:47:10,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:10,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:10,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:47:10,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:47:10,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:47:10,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:10,998 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:47:11,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:11,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:11,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:11,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:11,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:11,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:47:11,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:11,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:47:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:47:11,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:11,064 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 13:47:11,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610866578] [2020-10-29 13:47:11,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:11,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:47:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738190551] [2020-10-29 13:47:11,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:47:11,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:47:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:47:11,066 INFO L87 Difference]: Start difference. First operand 1459 states and 1984 transitions. Second operand 8 states. [2020-10-29 13:47:12,026 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:47:16,038 WARN L193 SmtUtils]: Spent 979.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 13:47:18,502 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2020-10-29 13:47:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:19,211 INFO L93 Difference]: Finished difference Result 4587 states and 6547 transitions. [2020-10-29 13:47:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:47:19,212 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-29 13:47:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:19,223 INFO L225 Difference]: With dead ends: 4587 [2020-10-29 13:47:19,223 INFO L226 Difference]: Without dead ends: 3924 [2020-10-29 13:47:19,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:47:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3924 states. [2020-10-29 13:47:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3924 to 1535. [2020-10-29 13:47:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2020-10-29 13:47:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2092 transitions. [2020-10-29 13:47:19,596 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2092 transitions. Word has length 73 [2020-10-29 13:47:19,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:19,596 INFO L481 AbstractCegarLoop]: Abstraction has 1535 states and 2092 transitions. [2020-10-29 13:47:19,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:47:19,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2092 transitions. [2020-10-29 13:47:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:47:19,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:19,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:19,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:47:19,600 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:19,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:19,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1389815562, now seen corresponding path program 1 times [2020-10-29 13:47:19,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:19,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255631857] [2020-10-29 13:47:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:19,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:19,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:19,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:20,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:23,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:23,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:47:23,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:47:23,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4065 [2020-10-29 13:47:23,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:23,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:23,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:47:23,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:47:23,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:47:23,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:24,756 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:47:24,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:24,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:24,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:24,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:24,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:24,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:47:24,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:24,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:24,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:47:24,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:24,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:47:24,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:24,805 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 13:47:24,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255631857] [2020-10-29 13:47:24,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:24,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:47:24,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064257687] [2020-10-29 13:47:24,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:47:24,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:24,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:47:24,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:47:24,807 INFO L87 Difference]: Start difference. First operand 1535 states and 2092 transitions. Second operand 9 states. [2020-10-29 13:47:25,807 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:47:31,044 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 367 DAG size of output: 364 [2020-10-29 13:47:32,099 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-29 13:47:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:34,436 INFO L93 Difference]: Finished difference Result 4721 states and 6645 transitions. [2020-10-29 13:47:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 13:47:34,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-29 13:47:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:34,445 INFO L225 Difference]: With dead ends: 4721 [2020-10-29 13:47:34,445 INFO L226 Difference]: Without dead ends: 3605 [2020-10-29 13:47:34,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:47:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2020-10-29 13:47:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2075. [2020-10-29 13:47:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2020-10-29 13:47:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2877 transitions. [2020-10-29 13:47:35,057 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2877 transitions. Word has length 74 [2020-10-29 13:47:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:35,057 INFO L481 AbstractCegarLoop]: Abstraction has 2075 states and 2877 transitions. [2020-10-29 13:47:35,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:47:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2877 transitions. [2020-10-29 13:47:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:47:35,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:35,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:35,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:47:35,061 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash 880062425, now seen corresponding path program 1 times [2020-10-29 13:47:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:35,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705251683] [2020-10-29 13:47:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:35,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:35,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking...