/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=DEEPEST --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.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:00:17,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:00:17,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:00:17,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:00:17,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:00:17,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:00:17,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:00:17,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:00:17,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:00:17,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:00:17,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:00:17,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:00:17,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:00:17,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:00:17,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:00:17,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:00:17,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:00:17,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:00:17,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:00:17,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:00:17,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:00:17,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:00:17,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:00:17,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:00:17,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:00:17,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:00:17,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:00:17,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:00:17,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:00:17,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:00:17,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:00:17,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:00:17,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:00:17,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:00:17,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:00:17,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:00:17,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:00:17,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:00:17,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:00:17,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:00:17,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:00:17,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:00:17,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:00:17,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:00:17,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:00:17,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:00:17,507 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:00:17,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:00:17,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:00:17,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:00:17,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:00:17,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:00:17,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:00:17,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:00:17,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:00:17,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:00:17,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:00:17,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:00:17,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:00:17,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:00:17,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:00:17,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:00:17,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:00:17,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:00:17,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:00:17,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:00:17,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:00:17,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:00:17,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:00:17,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:00:17,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:00:17,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:00:17,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:00:17,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:00:17,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:00:17,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:00:17,921 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:00:17,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:00:18,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34f8e12ab/b10e2204e64546cc91a18ad848f90016/FLAGf7fd8dc48 [2020-10-28 00:00:18,601 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:00:18,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:00:18,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34f8e12ab/b10e2204e64546cc91a18ad848f90016/FLAGf7fd8dc48 [2020-10-28 00:00:18,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34f8e12ab/b10e2204e64546cc91a18ad848f90016 [2020-10-28 00:00:18,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:00:18,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:00:18,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:00:18,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:00:18,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:00:18,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:00:18" (1/1) ... [2020-10-28 00:00:18,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42aa3e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:18, skipping insertion in model container [2020-10-28 00:00:18,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:00:18" (1/1) ... [2020-10-28 00:00:18,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:00:19,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:00:19,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:00:19,404 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:00:19,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:00:19,518 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:00:19,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19 WrapperNode [2020-10-28 00:00:19,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:00:19,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:00:19,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:00:19,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:00:19,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19" (1/1) ... [2020-10-28 00:00:19,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19" (1/1) ... [2020-10-28 00:00:19,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19" (1/1) ... [2020-10-28 00:00:19,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19" (1/1) ... [2020-10-28 00:00:19,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19" (1/1) ... [2020-10-28 00:00:19,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19" (1/1) ... [2020-10-28 00:00:19,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19" (1/1) ... [2020-10-28 00:00:19,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:00:19,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:00:19,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:00:19,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:00:19,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:00:19,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:00:19,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:00:19,715 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:00:19,716 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:00:19,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:00:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:00:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:00:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:00:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:00:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:00:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:00:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:00:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:00:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:00:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:00:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:00:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:00:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:00:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:00:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:00:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:00:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 00:00:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-28 00:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:00:19,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:00:19,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:00:19,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:00:19,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:00:19,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:00:20,603 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:00:20,603 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:00:20,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:00:20 BoogieIcfgContainer [2020-10-28 00:00:20,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:00:20,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:00:20,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:00:20,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:00:20,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:00:18" (1/3) ... [2020-10-28 00:00:20,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6b162e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:00:20, skipping insertion in model container [2020-10-28 00:00:20,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:19" (2/3) ... [2020-10-28 00:00:20,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6b162e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:00:20, skipping insertion in model container [2020-10-28 00:00:20,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:00:20" (3/3) ... [2020-10-28 00:00:20,613 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:00:20,625 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:00:20,630 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:00:20,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:00:20,670 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:00:20,671 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:00:20,671 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:00:20,671 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:00:20,671 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:00:20,671 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:00:20,672 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:00:20,672 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:00:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2020-10-28 00:00:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 00:00:20,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:20,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:20,705 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:20,711 INFO L82 PathProgramCache]: Analyzing trace with hash 308652574, now seen corresponding path program 1 times [2020-10-28 00:00:20,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:20,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253255599] [2020-10-28 00:00:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:21,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:21,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:21,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:22,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:23,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:26,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:26,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 00:00:26,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:00:26,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:00:26,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:26,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:00:26,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 00:00:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:00:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:00:26,620 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:00:26,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:26,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:26,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:26,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:26,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:26,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:00:26,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:26,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:26,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:26,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253255599] [2020-10-28 00:00:26,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:26,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:00:26,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915909786] [2020-10-28 00:00:26,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:00:26,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:26,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:00:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:00:26,727 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 4 states. [2020-10-28 00:00:27,248 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:28,158 INFO L93 Difference]: Finished difference Result 313 states and 505 transitions. [2020-10-28 00:00:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:00:28,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-10-28 00:00:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:28,173 INFO L225 Difference]: With dead ends: 313 [2020-10-28 00:00:28,173 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 00:00:28,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:00:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 00:00:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-10-28 00:00:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-28 00:00:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 303 transitions. [2020-10-28 00:00:28,297 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 303 transitions. Word has length 92 [2020-10-28 00:00:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:28,299 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 303 transitions. [2020-10-28 00:00:28,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:00:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 303 transitions. [2020-10-28 00:00:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 00:00:28,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:28,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:28,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:00:28,313 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1508263115, now seen corresponding path program 1 times [2020-10-28 00:00:28,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:28,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584857017] [2020-10-28 00:00:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:28,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:28,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:28,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:28,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:28,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:29,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:30,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:33,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:33,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 00:00:33,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:00:33,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:00:33,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:00:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:00:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:00:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:33,826 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:00:33,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:33,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:33,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:33,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:33,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:33,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:00:33,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:33,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:33,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:33,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:33,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:33,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584857017] [2020-10-28 00:00:33,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:33,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:00:33,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087924426] [2020-10-28 00:00:33,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:00:33,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:33,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:00:33,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:00:33,901 INFO L87 Difference]: Start difference. First operand 212 states and 303 transitions. Second operand 4 states. [2020-10-28 00:00:34,330 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:35,106 INFO L93 Difference]: Finished difference Result 506 states and 769 transitions. [2020-10-28 00:00:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:00:35,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-28 00:00:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:35,110 INFO L225 Difference]: With dead ends: 506 [2020-10-28 00:00:35,111 INFO L226 Difference]: Without dead ends: 351 [2020-10-28 00:00:35,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:00:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-28 00:00:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 348. [2020-10-28 00:00:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-28 00:00:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 519 transitions. [2020-10-28 00:00:35,148 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 519 transitions. Word has length 93 [2020-10-28 00:00:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:35,149 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 519 transitions. [2020-10-28 00:00:35,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:00:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 519 transitions. [2020-10-28 00:00:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 00:00:35,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:35,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:35,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:00:35,151 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:35,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1720356133, now seen corresponding path program 1 times [2020-10-28 00:00:35,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:35,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169229310] [2020-10-28 00:00:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:35,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:35,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:35,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:35,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:35,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:36,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:36,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:36,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:37,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:38,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:40,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:40,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 00:00:40,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:00:40,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:00:40,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:00:40,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 00:00:40,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 00:00:40,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:40,630 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:00:40,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:40,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:40,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:40,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:40,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:40,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:00:40,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:40,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:40,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169229310] [2020-10-28 00:00:40,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:40,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:00:40,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604427163] [2020-10-28 00:00:40,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:00:40,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:40,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:00:40,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:00:40,687 INFO L87 Difference]: Start difference. First operand 348 states and 519 transitions. Second operand 7 states. [2020-10-28 00:00:41,124 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:42,147 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:00:42,481 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:43,226 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:00:43,576 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:00:44,172 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:00:44,523 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:45,213 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:00:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:45,342 INFO L93 Difference]: Finished difference Result 2670 states and 4203 transitions. [2020-10-28 00:00:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:00:45,343 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-28 00:00:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:45,362 INFO L225 Difference]: With dead ends: 2670 [2020-10-28 00:00:45,366 INFO L226 Difference]: Without dead ends: 2379 [2020-10-28 00:00:45,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:00:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-10-28 00:00:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 920. [2020-10-28 00:00:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 920 states. [2020-10-28 00:00:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1429 transitions. [2020-10-28 00:00:45,481 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1429 transitions. Word has length 94 [2020-10-28 00:00:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:45,482 INFO L481 AbstractCegarLoop]: Abstraction has 920 states and 1429 transitions. [2020-10-28 00:00:45,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:00:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1429 transitions. [2020-10-28 00:00:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 00:00:45,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:45,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:45,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:00:45,484 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1739408672, now seen corresponding path program 1 times [2020-10-28 00:00:45,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:45,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251335054] [2020-10-28 00:00:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:45,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:45,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:45,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:45,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:45,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:46,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:46,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:50,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:50,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 00:00:50,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:00:50,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:00:50,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:00:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:00:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:00:50,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:50,894 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:00:50,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:50,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:50,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:50,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:50,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:50,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:00:50,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:50,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:50,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251335054] [2020-10-28 00:00:50,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:50,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:00:50,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399733746] [2020-10-28 00:00:50,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:00:50,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:50,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:00:50,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:00:50,948 INFO L87 Difference]: Start difference. First operand 920 states and 1429 transitions. Second operand 4 states. [2020-10-28 00:00:51,334 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:52,120 INFO L93 Difference]: Finished difference Result 2550 states and 4017 transitions. [2020-10-28 00:00:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:00:52,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-28 00:00:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:52,133 INFO L225 Difference]: With dead ends: 2550 [2020-10-28 00:00:52,133 INFO L226 Difference]: Without dead ends: 1687 [2020-10-28 00:00:52,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:00:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2020-10-28 00:00:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1684. [2020-10-28 00:00:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1684 states. [2020-10-28 00:00:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2631 transitions. [2020-10-28 00:00:52,244 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2631 transitions. Word has length 94 [2020-10-28 00:00:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:52,245 INFO L481 AbstractCegarLoop]: Abstraction has 1684 states and 2631 transitions. [2020-10-28 00:00:52,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:00:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2631 transitions. [2020-10-28 00:00:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 00:00:52,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:52,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:52,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:00:52,249 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:52,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1675800, now seen corresponding path program 1 times [2020-10-28 00:00:52,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:52,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694960913] [2020-10-28 00:00:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:52,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:52,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:52,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:52,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:53,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:53,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:55,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:57,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:57,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 00:00:57,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:00:57,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:00:57,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:57,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:00:57,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:00:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:00:57,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:57,757 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:00:57,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:57,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:57,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:57,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:57,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:57,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:00:57,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:57,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:57,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:57,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:57,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:57,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694960913] [2020-10-28 00:00:57,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:57,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:00:57,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123661756] [2020-10-28 00:00:57,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:00:57,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:57,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:00:57,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:00:57,849 INFO L87 Difference]: Start difference. First operand 1684 states and 2631 transitions. Second operand 4 states. [2020-10-28 00:00:58,207 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:00:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:59,012 INFO L93 Difference]: Finished difference Result 4746 states and 7467 transitions. [2020-10-28 00:00:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:00:59,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-28 00:00:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:59,029 INFO L225 Difference]: With dead ends: 4746 [2020-10-28 00:00:59,029 INFO L226 Difference]: Without dead ends: 3119 [2020-10-28 00:00:59,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:00:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2020-10-28 00:00:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 3116. [2020-10-28 00:00:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3116 states. [2020-10-28 00:00:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 4867 transitions. [2020-10-28 00:00:59,231 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 4867 transitions. Word has length 95 [2020-10-28 00:00:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:59,232 INFO L481 AbstractCegarLoop]: Abstraction has 3116 states and 4867 transitions. [2020-10-28 00:00:59,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:00:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 4867 transitions. [2020-10-28 00:00:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 00:00:59,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:59,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:59,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:00:59,234 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:59,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1624622854, now seen corresponding path program 1 times [2020-10-28 00:00:59,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:59,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486410592] [2020-10-28 00:00:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:59,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:59,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:59,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:59,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:59,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:00,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:00,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:00,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:04,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:04,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 00:01:04,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:01:04,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:01:04,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:04,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:04,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 00:01:04,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 00:01:04,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:04,640 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:01:04,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:04,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:04,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:04,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:04,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:04,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:01:04,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:04,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:04,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:04,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:04,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:01:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:04,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486410592] [2020-10-28 00:01:04,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:04,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:04,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670260829] [2020-10-28 00:01:04,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:04,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:04,707 INFO L87 Difference]: Start difference. First operand 3116 states and 4867 transitions. Second operand 7 states. [2020-10-28 00:01:05,109 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:05,920 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:01:06,243 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:07,095 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:01:07,479 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:01:08,342 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:01:08,686 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:09,525 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:01:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:09,679 INFO L93 Difference]: Finished difference Result 21491 states and 33722 transitions. [2020-10-28 00:01:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:01:09,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-28 00:01:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:09,775 INFO L225 Difference]: With dead ends: 21491 [2020-10-28 00:01:09,775 INFO L226 Difference]: Without dead ends: 19448 [2020-10-28 00:01:09,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:01:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19448 states. [2020-10-28 00:01:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19448 to 6195. [2020-10-28 00:01:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6195 states. [2020-10-28 00:01:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6195 states to 6195 states and 9674 transitions. [2020-10-28 00:01:10,306 INFO L78 Accepts]: Start accepts. Automaton has 6195 states and 9674 transitions. Word has length 96 [2020-10-28 00:01:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:10,307 INFO L481 AbstractCegarLoop]: Abstraction has 6195 states and 9674 transitions. [2020-10-28 00:01:10,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:01:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6195 states and 9674 transitions. [2020-10-28 00:01:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 00:01:10,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:10,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:01:10,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:01:10,309 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash 566770276, now seen corresponding path program 1 times [2020-10-28 00:01:10,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:10,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47151141] [2020-10-28 00:01:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:10,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:10,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:10,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:10,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:10,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:11,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:11,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:11,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:15,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:15,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 00:01:15,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:01:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:01:15,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 00:01:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 00:01:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:15,738 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:01:15,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:15,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:15,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:15,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:15,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:15,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:01:15,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:15,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:15,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47151141] [2020-10-28 00:01:15,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:15,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:15,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33416335] [2020-10-28 00:01:15,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:15,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:15,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:15,784 INFO L87 Difference]: Start difference. First operand 6195 states and 9674 transitions. Second operand 7 states. [2020-10-28 00:01:16,187 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:17,083 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:01:17,439 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:18,192 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:01:18,532 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:01:19,366 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:01:19,762 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:20,545 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:01:20,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:20,714 INFO L93 Difference]: Finished difference Result 24432 states and 38175 transitions. [2020-10-28 00:01:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:01:20,715 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-28 00:01:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:20,761 INFO L225 Difference]: With dead ends: 24432 [2020-10-28 00:01:20,762 INFO L226 Difference]: Without dead ends: 20365 [2020-10-28 00:01:20,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:01:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20365 states. [2020-10-28 00:01:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20365 to 8219. [2020-10-28 00:01:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8219 states. [2020-10-28 00:01:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 12850 transitions. [2020-10-28 00:01:21,409 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 12850 transitions. Word has length 96 [2020-10-28 00:01:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:21,410 INFO L481 AbstractCegarLoop]: Abstraction has 8219 states and 12850 transitions. [2020-10-28 00:01:21,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:01:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 12850 transitions. [2020-10-28 00:01:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 00:01:21,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:21,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:01:21,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:01:21,412 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:21,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1401972767, now seen corresponding path program 1 times [2020-10-28 00:01:21,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:21,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924027825] [2020-10-28 00:01:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:21,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:21,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:21,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:21,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:23,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:26,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:26,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 00:01:26,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:01:26,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:01:26,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:01:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:01:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:01:26,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:26,797 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:01:26,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:26,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:26,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:26,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:26,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:26,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:01:26,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:26,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:26,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:26,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:26,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:26,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924027825] [2020-10-28 00:01:26,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:26,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:01:26,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043008895] [2020-10-28 00:01:26,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:01:26,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:26,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:01:26,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:01:26,848 INFO L87 Difference]: Start difference. First operand 8219 states and 12850 transitions. Second operand 4 states. [2020-10-28 00:01:27,224 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:28,473 INFO L93 Difference]: Finished difference Result 23440 states and 36650 transitions. [2020-10-28 00:01:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:01:28,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-28 00:01:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:28,510 INFO L225 Difference]: With dead ends: 23440 [2020-10-28 00:01:28,510 INFO L226 Difference]: Without dead ends: 15306 [2020-10-28 00:01:28,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:01:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15306 states. [2020-10-28 00:01:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15306 to 15303. [2020-10-28 00:01:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15303 states. [2020-10-28 00:01:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15303 states to 15303 states and 23770 transitions. [2020-10-28 00:01:29,481 INFO L78 Accepts]: Start accepts. Automaton has 15303 states and 23770 transitions. Word has length 96 [2020-10-28 00:01:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:29,482 INFO L481 AbstractCegarLoop]: Abstraction has 15303 states and 23770 transitions. [2020-10-28 00:01:29,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:01:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 15303 states and 23770 transitions. [2020-10-28 00:01:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 00:01:29,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:29,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:01:29,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:01:29,483 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:29,484 INFO L82 PathProgramCache]: Analyzing trace with hash 783370893, now seen corresponding path program 1 times [2020-10-28 00:01:29,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:29,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164719556] [2020-10-28 00:01:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:29,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:29,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:29,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:29,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:30,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:34,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:34,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 00:01:34,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:01:34,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:01:34,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:01:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:01:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:01:34,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:34,857 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:01:34,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:34,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:34,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:34,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:34,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:34,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:01:34,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:34,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:34,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164719556] [2020-10-28 00:01:34,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:34,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:01:34,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237443636] [2020-10-28 00:01:34,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:01:34,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:34,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:01:34,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:01:34,892 INFO L87 Difference]: Start difference. First operand 15303 states and 23770 transitions. Second operand 4 states. [2020-10-28 00:01:35,257 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:37,174 INFO L93 Difference]: Finished difference Result 43682 states and 67770 transitions. [2020-10-28 00:01:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:01:37,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 00:01:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:37,225 INFO L225 Difference]: With dead ends: 43682 [2020-10-28 00:01:37,225 INFO L226 Difference]: Without dead ends: 28454 [2020-10-28 00:01:37,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:01:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28454 states. [2020-10-28 00:01:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28454 to 28451. [2020-10-28 00:01:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28451 states. [2020-10-28 00:01:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28451 states to 28451 states and 43826 transitions. [2020-10-28 00:01:38,916 INFO L78 Accepts]: Start accepts. Automaton has 28451 states and 43826 transitions. Word has length 97 [2020-10-28 00:01:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:38,916 INFO L481 AbstractCegarLoop]: Abstraction has 28451 states and 43826 transitions. [2020-10-28 00:01:38,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:01:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 28451 states and 43826 transitions. [2020-10-28 00:01:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 00:01:38,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:38,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:01:38,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:01:38,917 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:38,918 INFO L82 PathProgramCache]: Analyzing trace with hash -341978735, now seen corresponding path program 1 times [2020-10-28 00:01:38,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:38,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165183450] [2020-10-28 00:01:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:38,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:39,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:39,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:43,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:43,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 00:01:43,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:01:43,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:01:43,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:43,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:43,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:01:43,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 00:01:43,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:44,319 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:01:44,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:44,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:44,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:44,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:44,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:01:44,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:44,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165183450] [2020-10-28 00:01:44,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:44,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:44,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832628269] [2020-10-28 00:01:44,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:44,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:44,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:44,356 INFO L87 Difference]: Start difference. First operand 28451 states and 43826 transitions. Second operand 7 states. [2020-10-28 00:01:44,756 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:45,603 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:01:45,978 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:47,432 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:01:47,801 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:01:51,841 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:01:52,218 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:01:55,196 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:01:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:56,256 INFO L93 Difference]: Finished difference Result 170054 states and 261840 transitions. [2020-10-28 00:01:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:01:56,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-28 00:01:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:56,646 INFO L225 Difference]: With dead ends: 170054 [2020-10-28 00:01:56,646 INFO L226 Difference]: Without dead ends: 155843 [2020-10-28 00:01:56,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:01:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155843 states. [2020-10-28 00:02:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155843 to 42478. [2020-10-28 00:02:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42478 states. [2020-10-28 00:02:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42478 states to 42478 states and 65151 transitions. [2020-10-28 00:02:01,092 INFO L78 Accepts]: Start accepts. Automaton has 42478 states and 65151 transitions. Word has length 98 [2020-10-28 00:02:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:02:01,092 INFO L481 AbstractCegarLoop]: Abstraction has 42478 states and 65151 transitions. [2020-10-28 00:02:01,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:02:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 42478 states and 65151 transitions. [2020-10-28 00:02:01,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 00:02:01,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:02:01,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:02:01,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:02:01,093 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:02:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:02:01,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1510152367, now seen corresponding path program 1 times [2020-10-28 00:02:01,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:02:01,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145464066] [2020-10-28 00:02:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:02:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:01,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:01,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:01,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:01,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:01,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:06,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:06,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 00:02:06,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:02:06,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:02:06,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:02:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:02:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 00:02:06,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:06,499 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:02:06,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:02:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:06,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:06,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:06,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:02:06,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:02:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:02:06,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:02:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:02:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:02:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:02:06,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145464066] [2020-10-28 00:02:06,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:02:06,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:02:06,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204213954] [2020-10-28 00:02:06,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:02:06,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:02:06,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:02:06,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:02:06,535 INFO L87 Difference]: Start difference. First operand 42478 states and 65151 transitions. Second operand 7 states. [2020-10-28 00:02:06,932 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:02:07,792 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:02:08,149 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:02:09,508 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:02:09,862 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:02:14,762 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:02:15,125 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:02:18,436 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:02:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:02:20,040 INFO L93 Difference]: Finished difference Result 170861 states and 261724 transitions. [2020-10-28 00:02:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:02:20,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-28 00:02:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:02:20,218 INFO L225 Difference]: With dead ends: 170861 [2020-10-28 00:02:20,218 INFO L226 Difference]: Without dead ends: 142570 [2020-10-28 00:02:20,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:02:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142570 states. [2020-10-28 00:02:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142570 to 56547. [2020-10-28 00:02:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56547 states. [2020-10-28 00:02:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56547 states to 56547 states and 86770 transitions. [2020-10-28 00:02:24,902 INFO L78 Accepts]: Start accepts. Automaton has 56547 states and 86770 transitions. Word has length 98 [2020-10-28 00:02:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:02:24,902 INFO L481 AbstractCegarLoop]: Abstraction has 56547 states and 86770 transitions. [2020-10-28 00:02:24,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:02:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 56547 states and 86770 transitions. [2020-10-28 00:02:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 00:02:24,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:02:24,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:02:24,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:02:24,904 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:02:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:02:24,904 INFO L82 PathProgramCache]: Analyzing trace with hash 681240763, now seen corresponding path program 1 times [2020-10-28 00:02:24,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:02:24,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717315361] [2020-10-28 00:02:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:02:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:24,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:24,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:24,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:25,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:25,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:25,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:27,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:29,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:29,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 00:02:29,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:02:29,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:02:29,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:29,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:02:29,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:02:29,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 00:02:29,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:30,298 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:02:30,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:02:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:30,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:30,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:30,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:02:30,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:02:30,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:02:30,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:30,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:02:30,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:02:30,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:02:30,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:02:30,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717315361] [2020-10-28 00:02:30,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:02:30,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:02:30,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125336036] [2020-10-28 00:02:30,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:02:30,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:02:30,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:02:30,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:02:30,333 INFO L87 Difference]: Start difference. First operand 56547 states and 86770 transitions. Second operand 7 states. [2020-10-28 00:02:30,735 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:02:31,593 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:02:31,954 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:02:33,577 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:02:33,923 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:02:39,938 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:02:40,287 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:02:44,534 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:02:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:02:46,500 INFO L93 Difference]: Finished difference Result 193105 states and 295771 transitions. [2020-10-28 00:02:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:02:46,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-28 00:02:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:02:46,862 INFO L225 Difference]: With dead ends: 193105 [2020-10-28 00:02:46,862 INFO L226 Difference]: Without dead ends: 164814 [2020-10-28 00:02:46,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:02:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164814 states. [2020-10-28 00:02:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164814 to 70627. [2020-10-28 00:02:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70627 states. [2020-10-28 00:02:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70627 states to 70627 states and 108402 transitions. [2020-10-28 00:02:53,296 INFO L78 Accepts]: Start accepts. Automaton has 70627 states and 108402 transitions. Word has length 98 [2020-10-28 00:02:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:02:53,296 INFO L481 AbstractCegarLoop]: Abstraction has 70627 states and 108402 transitions. [2020-10-28 00:02:53,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:02:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 70627 states and 108402 transitions. [2020-10-28 00:02:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 00:02:53,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:02:53,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:02:53,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:02:53,298 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:02:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:02:53,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1516443254, now seen corresponding path program 1 times [2020-10-28 00:02:53,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:02:53,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682784006] [2020-10-28 00:02:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:02:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:53,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:53,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:53,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:53,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:56,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:56,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 00:02:56,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:02:56,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3026 [2020-10-28 00:02:56,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:56,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:02:56,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:02:56,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:02:56,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:56,781 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:02:56,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:02:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:56,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:56,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:56,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:02:56,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:02:56,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:02:56,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:56,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:02:56,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:02:56,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:02:56,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:02:56,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682784006] [2020-10-28 00:02:56,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:02:56,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:02:56,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573355102] [2020-10-28 00:02:56,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:02:56,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:02:56,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:02:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:02:56,813 INFO L87 Difference]: Start difference. First operand 70627 states and 108402 transitions. Second operand 7 states. [2020-10-28 00:02:57,198 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:02:58,158 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:02:58,524 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:02:58,874 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:03:01,940 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:03:02,597 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:03:19,504 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:03:29,217 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:03:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:30,297 INFO L93 Difference]: Finished difference Result 380700 states and 583853 transitions. [2020-10-28 00:03:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:03:30,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-28 00:03:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:31,035 INFO L225 Difference]: With dead ends: 380700 [2020-10-28 00:03:31,035 INFO L226 Difference]: Without dead ends: 352409 [2020-10-28 00:03:31,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:03:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352409 states. [2020-10-28 00:03:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352409 to 84460. [2020-10-28 00:03:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84460 states. [2020-10-28 00:03:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84460 states to 84460 states and 129020 transitions. [2020-10-28 00:03:42,171 INFO L78 Accepts]: Start accepts. Automaton has 84460 states and 129020 transitions. Word has length 98 [2020-10-28 00:03:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:42,172 INFO L481 AbstractCegarLoop]: Abstraction has 84460 states and 129020 transitions. [2020-10-28 00:03:42,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:03:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 84460 states and 129020 transitions. [2020-10-28 00:03:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 00:03:42,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:42,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:42,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:03:42,174 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:42,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:42,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1479670838, now seen corresponding path program 1 times [2020-10-28 00:03:42,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:42,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721699339] [2020-10-28 00:03:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:42,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:42,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:42,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:42,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:45,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:45,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 00:03:45,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:03:45,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3001 [2020-10-28 00:03:45,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:03:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:03:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 00:03:45,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:45,588 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:03:45,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:45,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:45,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:45,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:45,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:45,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:03:45,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:45,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:45,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721699339] [2020-10-28 00:03:45,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:45,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:03:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897284521] [2020-10-28 00:03:45,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:03:45,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:45,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:03:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:03:45,628 INFO L87 Difference]: Start difference. First operand 84460 states and 129020 transitions. Second operand 7 states. [2020-10-28 00:03:46,034 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:03:46,971 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:03:47,334 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:03:47,683 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:03:51,370 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:03:52,003 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 203