/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:19:48,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:19:48,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:19:48,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:19:48,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:19:48,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:19:48,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:19:48,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:19:48,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:19:48,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:19:48,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:19:48,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:19:48,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:19:48,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:19:48,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:19:48,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:19:48,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:19:48,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:19:48,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:19:48,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:19:48,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:19:48,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:19:48,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:19:48,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:19:48,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:19:48,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:19:48,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:19:48,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:19:48,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:19:48,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:19:48,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:19:48,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:19:48,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:19:48,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:19:48,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:19:48,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:19:48,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:19:48,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:19:48,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:19:48,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:19:48,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:19:48,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:19:49,037 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:19:49,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:19:49,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:19:49,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:19:49,043 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:19:49,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:19:49,043 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:19:49,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:19:49,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:19:49,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:19:49,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:19:49,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:19:49,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:19:49,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:19:49,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:19:49,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:19:49,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:19:49,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:19:49,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:19:49,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:19:49,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:19:49,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:19:49,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:19:49,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:19:49,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:19:49,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:19:49,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:19:49,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:19:49,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:19:49,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:19:49,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:19:49,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:19:49,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:19:49,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:19:49,557 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:19:49,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:19:49,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/771d938ae/ac5eb02ac8514b28a0f0426374b02006/FLAGfc68f0702 [2020-10-29 13:19:50,328 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:19:50,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:19:50,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/771d938ae/ac5eb02ac8514b28a0f0426374b02006/FLAGfc68f0702 [2020-10-29 13:19:50,647 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/771d938ae/ac5eb02ac8514b28a0f0426374b02006 [2020-10-29 13:19:50,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:19:50,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:19:50,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:19:50,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:19:50,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:19:50,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:19:50" (1/1) ... [2020-10-29 13:19:50,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25876592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:50, skipping insertion in model container [2020-10-29 13:19:50,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:19:50" (1/1) ... [2020-10-29 13:19:50,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:19:50,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:19:51,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:19:51,101 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:19:51,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:19:51,210 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:19:51,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51 WrapperNode [2020-10-29 13:19:51,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:19:51,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:19:51,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:19:51,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:19:51,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51" (1/1) ... [2020-10-29 13:19:51,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51" (1/1) ... [2020-10-29 13:19:51,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51" (1/1) ... [2020-10-29 13:19:51,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51" (1/1) ... [2020-10-29 13:19:51,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51" (1/1) ... [2020-10-29 13:19:51,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51" (1/1) ... [2020-10-29 13:19:51,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51" (1/1) ... [2020-10-29 13:19:51,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:19:51,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:19:51,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:19:51,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:19:51,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:19:51,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:19:51,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:19:51,407 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:19:51,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:19:51,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:19:51,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:19:51,407 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:19:51,407 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:19:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:19:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:19:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:19:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:19:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:19:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:19:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:19:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:19:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:19:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:19:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:19:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:19:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:19:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:19:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:19:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:19:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:19:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:19:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:19:51,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:19:51,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:19:52,445 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:19:52,445 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:19:52,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:19:52 BoogieIcfgContainer [2020-10-29 13:19:52,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:19:52,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:19:52,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:19:52,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:19:52,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:19:50" (1/3) ... [2020-10-29 13:19:52,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32eaf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:19:52, skipping insertion in model container [2020-10-29 13:19:52,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:19:51" (2/3) ... [2020-10-29 13:19:52,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32eaf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:19:52, skipping insertion in model container [2020-10-29 13:19:52,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:19:52" (3/3) ... [2020-10-29 13:19:52,457 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:19:52,469 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:19:52,474 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:19:52,488 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:19:52,516 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:19:52,517 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:19:52,517 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:19:52,517 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:19:52,517 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:19:52,517 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:19:52,517 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:19:52,517 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:19:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-10-29 13:19:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:19:52,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:52,548 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] [2020-10-29 13:19:52,549 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash 350764180, now seen corresponding path program 1 times [2020-10-29 13:19:52,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:52,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330644399] [2020-10-29 13:19:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:53,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:53,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:53,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:53,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:53,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:53,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:54,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:54,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:57,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:57,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:19:57,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:19:57,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 13:19:57,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:57,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:57,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:57,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:19:57,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:19:57,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:19:58,295 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:19:58,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:58,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:58,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:58,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:58,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:58,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-29 13:19:58,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:58,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:19:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:19:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:58,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330644399] [2020-10-29 13:19:58,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:58,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:58,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966570165] [2020-10-29 13:19:58,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:58,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:58,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:58,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:58,518 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 6 states. [2020-10-29 13:19:58,861 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:19:59,657 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:19:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:59,959 INFO L93 Difference]: Finished difference Result 286 states and 463 transitions. [2020-10-29 13:19:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:19:59,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:19:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:59,974 INFO L225 Difference]: With dead ends: 286 [2020-10-29 13:19:59,975 INFO L226 Difference]: Without dead ends: 183 [2020-10-29 13:19:59,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-29 13:20:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2020-10-29 13:20:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 13:20:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 257 transitions. [2020-10-29 13:20:00,059 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 257 transitions. Word has length 66 [2020-10-29 13:20:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:00,061 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 257 transitions. [2020-10-29 13:20:00,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 257 transitions. [2020-10-29 13:20:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:20:00,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:00,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:00,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:20:00,069 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:00,072 INFO L82 PathProgramCache]: Analyzing trace with hash 816375659, now seen corresponding path program 1 times [2020-10-29 13:20:00,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:00,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106817238] [2020-10-29 13:20:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:00,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:01,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:01,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:04,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:05,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:05,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:20:05,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:20:05,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:20:05,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:05,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:20:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:20:05,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:20:05,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:20:05,425 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:05,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:05,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:05,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:05,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:05,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:20:05,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:05,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:05,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:20:05,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:20:05,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:20:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:05,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106817238] [2020-10-29 13:20:05,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:05,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:20:05,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284048789] [2020-10-29 13:20:05,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:20:05,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:20:05,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:20:05,498 INFO L87 Difference]: Start difference. First operand 180 states and 257 transitions. Second operand 6 states. [2020-10-29 13:20:05,736 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:20:06,285 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:20:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:06,557 INFO L93 Difference]: Finished difference Result 417 states and 625 transitions. [2020-10-29 13:20:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:20:06,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:20:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:06,562 INFO L225 Difference]: With dead ends: 417 [2020-10-29 13:20:06,563 INFO L226 Difference]: Without dead ends: 282 [2020-10-29 13:20:06,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-29 13:20:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 279. [2020-10-29 13:20:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-29 13:20:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 411 transitions. [2020-10-29 13:20:06,627 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 411 transitions. Word has length 67 [2020-10-29 13:20:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:06,628 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 411 transitions. [2020-10-29 13:20:06,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 411 transitions. [2020-10-29 13:20:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:20:06,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:06,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:06,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:20:06,637 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:06,638 INFO L82 PathProgramCache]: Analyzing trace with hash -247514269, now seen corresponding path program 1 times [2020-10-29 13:20:06,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:06,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805657262] [2020-10-29 13:20:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:06,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:06,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:06,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:07,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:07,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:07,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:07,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:11,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:11,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:20:11,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:20:11,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:20:11,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:11,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:11,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:20:11,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:20:11,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:20:11,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:20:11,936 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:11,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:11,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:11,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:11,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:11,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:11,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:20:11,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:11,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:11,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:20:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:11,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805657262] [2020-10-29 13:20:11,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:11,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:20:11,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331984212] [2020-10-29 13:20:11,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:20:11,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:11,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:20:11,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:20:11,998 INFO L87 Difference]: Start difference. First operand 279 states and 411 transitions. Second operand 7 states. [2020-10-29 13:20:12,211 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:20:12,792 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:20:13,045 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:13,261 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:20:13,597 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:20:13,856 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:14,095 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:20:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:14,662 INFO L93 Difference]: Finished difference Result 1923 states and 2999 transitions. [2020-10-29 13:20:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:20:14,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-29 13:20:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:14,674 INFO L225 Difference]: With dead ends: 1923 [2020-10-29 13:20:14,674 INFO L226 Difference]: Without dead ends: 1724 [2020-10-29 13:20:14,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:20:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2020-10-29 13:20:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 499. [2020-10-29 13:20:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-10-29 13:20:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 751 transitions. [2020-10-29 13:20:14,748 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 751 transitions. Word has length 68 [2020-10-29 13:20:14,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:14,749 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 751 transitions. [2020-10-29 13:20:14,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:20:14,749 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 751 transitions. [2020-10-29 13:20:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:20:14,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:14,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:14,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:20:14,751 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1567301322, now seen corresponding path program 1 times [2020-10-29 13:20:14,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:14,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748810883] [2020-10-29 13:20:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:14,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:14,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:14,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:15,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:15,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:15,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:15,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:16,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:16,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:19,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:19,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:20:19,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:20:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:20:19,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:19,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:20:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:20:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:20:19,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:20,007 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:20,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:20,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:20,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:20,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:20,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:20,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:20:20,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:20,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:20,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:20,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748810883] [2020-10-29 13:20:20,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:20,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:20:20,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491799353] [2020-10-29 13:20:20,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:20:20,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:20,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:20:20,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:20:20,057 INFO L87 Difference]: Start difference. First operand 499 states and 751 transitions. Second operand 6 states. [2020-10-29 13:20:20,270 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:20:21,230 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:20:21,449 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:20:22,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:22,326 INFO L93 Difference]: Finished difference Result 3897 states and 6042 transitions. [2020-10-29 13:20:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:20:22,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-29 13:20:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:22,347 INFO L225 Difference]: With dead ends: 3897 [2020-10-29 13:20:22,347 INFO L226 Difference]: Without dead ends: 3478 [2020-10-29 13:20:22,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:20:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2020-10-29 13:20:22,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 1819. [2020-10-29 13:20:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1819 states. [2020-10-29 13:20:22,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2793 transitions. [2020-10-29 13:20:22,528 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2793 transitions. Word has length 70 [2020-10-29 13:20:22,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:22,529 INFO L481 AbstractCegarLoop]: Abstraction has 1819 states and 2793 transitions. [2020-10-29 13:20:22,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2793 transitions. [2020-10-29 13:20:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:20:22,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:22,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:22,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:20:22,532 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:22,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2113559392, now seen corresponding path program 1 times [2020-10-29 13:20:22,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:22,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330751229] [2020-10-29 13:20:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:22,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:23,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:27,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:27,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:20:27,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:20:27,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:20:27,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:27,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:20:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:20:27,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:27,917 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2020-10-29 13:20:28,151 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:28,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:28,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:28,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:28,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:28,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:28,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:20:28,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:28,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:28,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:28,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:28,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:28,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:28,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330751229] [2020-10-29 13:20:28,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:28,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:20:28,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695095523] [2020-10-29 13:20:28,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:20:28,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:20:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:20:28,199 INFO L87 Difference]: Start difference. First operand 1819 states and 2793 transitions. Second operand 8 states. [2020-10-29 13:20:28,476 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:20:29,423 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:20:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:30,132 INFO L93 Difference]: Finished difference Result 4259 states and 6593 transitions. [2020-10-29 13:20:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:20:30,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:20:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:30,148 INFO L225 Difference]: With dead ends: 4259 [2020-10-29 13:20:30,148 INFO L226 Difference]: Without dead ends: 2610 [2020-10-29 13:20:30,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:20:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2020-10-29 13:20:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 1819. [2020-10-29 13:20:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1819 states. [2020-10-29 13:20:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2791 transitions. [2020-10-29 13:20:30,419 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2791 transitions. Word has length 70 [2020-10-29 13:20:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:30,420 INFO L481 AbstractCegarLoop]: Abstraction has 1819 states and 2791 transitions. [2020-10-29 13:20:30,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:20:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2791 transitions. [2020-10-29 13:20:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:20:30,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:30,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:30,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:20:30,423 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:30,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:30,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1497587027, now seen corresponding path program 1 times [2020-10-29 13:20:30,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:30,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428760492] [2020-10-29 13:20:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:30,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:30,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:30,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:30,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:31,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:31,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:31,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:31,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:31,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:32,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:32,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:33,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:35,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:35,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:20:35,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:20:35,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:20:35,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:35,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:35,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:20:35,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:35,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:20:35,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:35,887 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:35,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:35,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:35,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:35,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:35,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:35,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:20:35,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:35,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:35,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428760492] [2020-10-29 13:20:35,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:35,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:20:35,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246340309] [2020-10-29 13:20:35,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:20:35,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:35,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:20:35,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:35,933 INFO L87 Difference]: Start difference. First operand 1819 states and 2791 transitions. Second operand 9 states. [2020-10-29 13:20:36,204 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:20:38,031 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:20:38,303 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:40,183 INFO L93 Difference]: Finished difference Result 5094 states and 7845 transitions. [2020-10-29 13:20:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:20:40,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-29 13:20:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:40,203 INFO L225 Difference]: With dead ends: 5094 [2020-10-29 13:20:40,204 INFO L226 Difference]: Without dead ends: 3466 [2020-10-29 13:20:40,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-10-29 13:20:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2020-10-29 13:20:40,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 1819. [2020-10-29 13:20:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1819 states. [2020-10-29 13:20:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2780 transitions. [2020-10-29 13:20:40,514 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2780 transitions. Word has length 71 [2020-10-29 13:20:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:40,514 INFO L481 AbstractCegarLoop]: Abstraction has 1819 states and 2780 transitions. [2020-10-29 13:20:40,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:20:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2780 transitions. [2020-10-29 13:20:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:20:40,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:40,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:40,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:20:40,517 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:40,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:40,518 INFO L82 PathProgramCache]: Analyzing trace with hash -418243151, now seen corresponding path program 1 times [2020-10-29 13:20:40,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:40,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282029706] [2020-10-29 13:20:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:40,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:40,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:40,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:40,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:40,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:41,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:42,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:43,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:43,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:43,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:44,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:44,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:44,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:44,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:44,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:44,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:44,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:45,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:45,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:20:45,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:20:45,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:20:45,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:45,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:20:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:20:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:20:45,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:45,934 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:45,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:45,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:45,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:45,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:45,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:20:45,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:45,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:45,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:20:45,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:45,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:20:45,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:46,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282029706] [2020-10-29 13:20:46,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:46,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:20:46,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153354708] [2020-10-29 13:20:46,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:20:46,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:20:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:46,035 INFO L87 Difference]: Start difference. First operand 1819 states and 2780 transitions. Second operand 9 states. [2020-10-29 13:20:46,354 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:20:47,196 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:20:48,575 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:49,452 INFO L93 Difference]: Finished difference Result 14588 states and 22258 transitions. [2020-10-29 13:20:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:20:49,453 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-29 13:20:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:49,523 INFO L225 Difference]: With dead ends: 14588 [2020-10-29 13:20:49,523 INFO L226 Difference]: Without dead ends: 12897 [2020-10-29 13:20:49,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:20:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12897 states. [2020-10-29 13:20:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12897 to 1906. [2020-10-29 13:20:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1906 states. [2020-10-29 13:20:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2850 transitions. [2020-10-29 13:20:50,048 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2850 transitions. Word has length 71 [2020-10-29 13:20:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:50,048 INFO L481 AbstractCegarLoop]: Abstraction has 1906 states and 2850 transitions. [2020-10-29 13:20:50,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:20:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2850 transitions. [2020-10-29 13:20:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:20:50,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:50,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:50,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:20:50,051 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:50,051 INFO L82 PathProgramCache]: Analyzing trace with hash -223389637, now seen corresponding path program 1 times [2020-10-29 13:20:50,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:50,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60718149] [2020-10-29 13:20:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:50,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:53,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:53,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:55,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:55,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:20:55,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:20:55,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:20:55,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:55,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:20:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:20:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:20:55,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:55,378 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:55,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:55,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:55,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:55,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:55,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:55,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:20:55,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:55,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:55,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:55,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:55,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:20:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:55,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60718149] [2020-10-29 13:20:55,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:55,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:20:55,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925966721] [2020-10-29 13:20:55,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:20:55,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:55,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:20:55,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:20:55,435 INFO L87 Difference]: Start difference. First operand 1906 states and 2850 transitions. Second operand 7 states. [2020-10-29 13:20:55,723 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:20:56,492 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:20:56,722 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:20:56,985 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:57,329 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:57,568 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:20:57,840 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:20:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:58,804 INFO L93 Difference]: Finished difference Result 8228 states and 12545 transitions. [2020-10-29 13:20:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:20:58,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-29 13:20:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:58,822 INFO L225 Difference]: With dead ends: 8228 [2020-10-29 13:20:58,822 INFO L226 Difference]: Without dead ends: 6665 [2020-10-29 13:20:58,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:20:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2020-10-29 13:20:59,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 1906. [2020-10-29 13:20:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1906 states. [2020-10-29 13:20:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2834 transitions. [2020-10-29 13:20:59,234 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2834 transitions. Word has length 71 [2020-10-29 13:20:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:59,234 INFO L481 AbstractCegarLoop]: Abstraction has 1906 states and 2834 transitions. [2020-10-29 13:20:59,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:20:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2834 transitions. [2020-10-29 13:20:59,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:20:59,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:59,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:59,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:20:59,237 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:59,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1248826822, now seen corresponding path program 1 times [2020-10-29 13:20:59,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:59,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622276941] [2020-10-29 13:20:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:59,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:00,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:04,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:04,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:21:04,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:21:04,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:21:04,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:04,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:04,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:21:04,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:21:04,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:21:04,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:04,532 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:21:04,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:04,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:04,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:04,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:04,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:21:04,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:04,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:04,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:04,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622276941] [2020-10-29 13:21:04,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:04,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:21:04,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37870735] [2020-10-29 13:21:04,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:21:04,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:21:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:21:04,569 INFO L87 Difference]: Start difference. First operand 1906 states and 2834 transitions. Second operand 5 states. [2020-10-29 13:21:04,856 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:21:05,411 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:21:06,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:06,110 INFO L93 Difference]: Finished difference Result 4856 states and 7302 transitions. [2020-10-29 13:21:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:21:06,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-29 13:21:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:06,119 INFO L225 Difference]: With dead ends: 4856 [2020-10-29 13:21:06,120 INFO L226 Difference]: Without dead ends: 3293 [2020-10-29 13:21:06,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:21:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2020-10-29 13:21:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3258. [2020-10-29 13:21:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3258 states. [2020-10-29 13:21:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 4802 transitions. [2020-10-29 13:21:06,791 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 4802 transitions. Word has length 71 [2020-10-29 13:21:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:06,791 INFO L481 AbstractCegarLoop]: Abstraction has 3258 states and 4802 transitions. [2020-10-29 13:21:06,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:21:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 4802 transitions. [2020-10-29 13:21:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:21:06,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:06,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:06,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:21:06,794 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:06,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1379679902, now seen corresponding path program 1 times [2020-10-29 13:21:06,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:06,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465029364] [2020-10-29 13:21:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:06,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:06,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:06,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:07,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:08,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:11,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:11,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:21:11,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:21:11,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:21:11,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:11,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:11,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:21:11,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 13:21:11,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:21:11,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:12,046 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:21:12,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:12,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:12,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:12,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:12,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:12,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:21:12,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:12,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:12,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:12,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:12,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:12,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:12,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465029364] [2020-10-29 13:21:12,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:12,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:21:12,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436564345] [2020-10-29 13:21:12,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:21:12,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:21:12,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:21:12,084 INFO L87 Difference]: Start difference. First operand 3258 states and 4802 transitions. Second operand 6 states. [2020-10-29 13:21:12,339 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:21:12,900 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:21:13,175 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:21:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:14,415 INFO L93 Difference]: Finished difference Result 8987 states and 13408 transitions. [2020-10-29 13:21:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:21:14,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:21:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:14,427 INFO L225 Difference]: With dead ends: 8987 [2020-10-29 13:21:14,427 INFO L226 Difference]: Without dead ends: 6072 [2020-10-29 13:21:14,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:21:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2020-10-29 13:21:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 6066. [2020-10-29 13:21:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6066 states. [2020-10-29 13:21:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6066 states to 6066 states and 8986 transitions. [2020-10-29 13:21:15,492 INFO L78 Accepts]: Start accepts. Automaton has 6066 states and 8986 transitions. Word has length 71 [2020-10-29 13:21:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:15,492 INFO L481 AbstractCegarLoop]: Abstraction has 6066 states and 8986 transitions. [2020-10-29 13:21:15,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:21:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6066 states and 8986 transitions. [2020-10-29 13:21:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:21:15,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:15,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:15,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:21:15,494 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1889642572, now seen corresponding path program 1 times [2020-10-29 13:21:15,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:15,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902591328] [2020-10-29 13:21:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:15,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:15,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:15,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:15,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:15,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:15,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:16,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:16,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:17,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:17,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:17,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:17,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:17,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:20,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:20,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:21:20,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:21:20,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:21:20,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:20,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:20,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:21:20,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:21:20,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:21:20,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:20,852 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:21:20,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:20,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:20,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:20,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:20,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:20,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:21:20,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:20,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:21:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:21:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:20,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902591328] [2020-10-29 13:21:20,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:20,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:21:20,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422274831] [2020-10-29 13:21:20,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:21:20,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:20,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:21:20,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:21:20,923 INFO L87 Difference]: Start difference. First operand 6066 states and 8986 transitions. Second operand 9 states. [2020-10-29 13:21:21,144 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:21:21,880 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:21:23,739 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:21:25,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:25,537 INFO L93 Difference]: Finished difference Result 20214 states and 30034 transitions. [2020-10-29 13:21:25,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:21:25,538 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-29 13:21:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:25,577 INFO L225 Difference]: With dead ends: 20214 [2020-10-29 13:21:25,577 INFO L226 Difference]: Without dead ends: 14399 [2020-10-29 13:21:25,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:21:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14399 states. [2020-10-29 13:21:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14399 to 5964. [2020-10-29 13:21:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5964 states. [2020-10-29 13:21:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 8764 transitions. [2020-10-29 13:21:26,790 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 8764 transitions. Word has length 71 [2020-10-29 13:21:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:26,790 INFO L481 AbstractCegarLoop]: Abstraction has 5964 states and 8764 transitions. [2020-10-29 13:21:26,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:21:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 8764 transitions. [2020-10-29 13:21:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:21:26,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:26,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:26,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:21:26,792 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash -244181579, now seen corresponding path program 1 times [2020-10-29 13:21:26,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:26,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771770681] [2020-10-29 13:21:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:26,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:26,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:26,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:31,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:31,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:21:31,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:21:31,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:21:31,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:31,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:31,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:21:31,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:21:31,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:21:31,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:32,233 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:21:32,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:32,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:32,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:32,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:32,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:32,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:21:32,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:32,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:32,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:32,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:32,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:32,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771770681] [2020-10-29 13:21:32,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:32,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:21:32,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865401316] [2020-10-29 13:21:32,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:21:32,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:32,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:21:32,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:21:32,290 INFO L87 Difference]: Start difference. First operand 5964 states and 8764 transitions. Second operand 9 states. [2020-10-29 13:21:32,566 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:21:33,549 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:21:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:35,651 INFO L93 Difference]: Finished difference Result 14616 states and 21494 transitions. [2020-10-29 13:21:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:21:35,651 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:21:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:35,670 INFO L225 Difference]: With dead ends: 14616 [2020-10-29 13:21:35,671 INFO L226 Difference]: Without dead ends: 8951 [2020-10-29 13:21:35,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:21:35,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8951 states. [2020-10-29 13:21:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8951 to 5964. [2020-10-29 13:21:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5964 states. [2020-10-29 13:21:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 8750 transitions. [2020-10-29 13:21:36,906 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 8750 transitions. Word has length 72 [2020-10-29 13:21:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:36,906 INFO L481 AbstractCegarLoop]: Abstraction has 5964 states and 8750 transitions. [2020-10-29 13:21:36,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:21:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 8750 transitions. [2020-10-29 13:21:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:21:36,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:36,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:36,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:21:36,908 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:36,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:36,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1208125140, now seen corresponding path program 1 times [2020-10-29 13:21:36,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:36,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308270942] [2020-10-29 13:21:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:36,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:36,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:37,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:37,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:37,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:37,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:38,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:38,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:38,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:41,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:41,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:41,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:41,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:21:41,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:21:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:21:41,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:41,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:21:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:21:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:21:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:42,213 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:21:42,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:42,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:42,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:42,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:42,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:42,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:21:42,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:42,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:42,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:42,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308270942] [2020-10-29 13:21:42,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:42,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:21:42,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636597479] [2020-10-29 13:21:42,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:21:42,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:21:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:21:42,241 INFO L87 Difference]: Start difference. First operand 5964 states and 8750 transitions. Second operand 6 states. [2020-10-29 13:21:42,517 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:21:43,109 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:21:43,346 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:21:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:45,371 INFO L93 Difference]: Finished difference Result 14719 states and 21695 transitions. [2020-10-29 13:21:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:21:45,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:21:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:45,389 INFO L225 Difference]: With dead ends: 14719 [2020-10-29 13:21:45,390 INFO L226 Difference]: Without dead ends: 9068 [2020-10-29 13:21:45,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:21:45,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9068 states. [2020-10-29 13:21:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9068 to 8198. [2020-10-29 13:21:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8198 states. [2020-10-29 13:21:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8198 states to 8198 states and 12105 transitions. [2020-10-29 13:21:47,010 INFO L78 Accepts]: Start accepts. Automaton has 8198 states and 12105 transitions. Word has length 73 [2020-10-29 13:21:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:47,011 INFO L481 AbstractCegarLoop]: Abstraction has 8198 states and 12105 transitions. [2020-10-29 13:21:47,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:21:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 8198 states and 12105 transitions. [2020-10-29 13:21:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:21:47,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:47,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:47,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:21:47,013 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:47,013 INFO L82 PathProgramCache]: Analyzing trace with hash 768429261, now seen corresponding path program 1 times [2020-10-29 13:21:47,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:47,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250995582] [2020-10-29 13:21:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:47,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:47,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:47,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:47,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:47,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:52,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:52,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:21:52,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:21:52,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:21:52,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:52,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:52,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:21:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:21:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:21:52,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:52,279 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:21:52,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:52,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:52,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:52,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:52,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:52,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:21:52,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:52,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:52,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:52,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:52,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:52,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:52,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250995582] [2020-10-29 13:21:52,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:52,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:21:52,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836843812] [2020-10-29 13:21:52,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:21:52,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:52,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:21:52,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:21:52,308 INFO L87 Difference]: Start difference. First operand 8198 states and 12105 transitions. Second operand 6 states. [2020-10-29 13:21:52,577 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:21:53,232 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:21:53,481 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:21:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:55,893 INFO L93 Difference]: Finished difference Result 15949 states and 23644 transitions. [2020-10-29 13:21:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:21:55,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:21:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:55,909 INFO L225 Difference]: With dead ends: 15949 [2020-10-29 13:21:55,909 INFO L226 Difference]: Without dead ends: 10562 [2020-10-29 13:21:55,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:21:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2020-10-29 13:21:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 9156. [2020-10-29 13:21:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9156 states. [2020-10-29 13:21:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9156 states to 9156 states and 13550 transitions. [2020-10-29 13:21:57,933 INFO L78 Accepts]: Start accepts. Automaton has 9156 states and 13550 transitions. Word has length 73 [2020-10-29 13:21:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:57,933 INFO L481 AbstractCegarLoop]: Abstraction has 9156 states and 13550 transitions. [2020-10-29 13:21:57,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:21:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 9156 states and 13550 transitions. [2020-10-29 13:21:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:21:57,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:57,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:57,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:21:57,935 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1442724650, now seen corresponding path program 1 times [2020-10-29 13:21:57,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:57,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140188277] [2020-10-29 13:21:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:57,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:57,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:58,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:58,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:02,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:02,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:22:02,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:22:02,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4633 [2020-10-29 13:22:02,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:02,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:02,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:22:02,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:22:02,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:22:02,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:02,819 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:22:02,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:02,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:02,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:02,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:02,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:02,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:22:02,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:02,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:02,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:22:02,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:02,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:22:02,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:02,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140188277] [2020-10-29 13:22:02,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:02,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:22:02,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929518924] [2020-10-29 13:22:02,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:22:02,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:02,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:22:02,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:22:02,848 INFO L87 Difference]: Start difference. First operand 9156 states and 13550 transitions. Second operand 6 states. [2020-10-29 13:22:03,128 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:22:03,821 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:22:04,042 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:22:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:06,679 INFO L93 Difference]: Finished difference Result 21069 states and 31160 transitions. [2020-10-29 13:22:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:22:06,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:22:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:06,696 INFO L225 Difference]: With dead ends: 21069 [2020-10-29 13:22:06,696 INFO L226 Difference]: Without dead ends: 12442 [2020-10-29 13:22:06,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:22:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12442 states. [2020-10-29 13:22:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12442 to 10604. [2020-10-29 13:22:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10604 states. [2020-10-29 13:22:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10604 states to 10604 states and 15706 transitions. [2020-10-29 13:22:09,176 INFO L78 Accepts]: Start accepts. Automaton has 10604 states and 15706 transitions. Word has length 73 [2020-10-29 13:22:09,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:09,177 INFO L481 AbstractCegarLoop]: Abstraction has 10604 states and 15706 transitions. [2020-10-29 13:22:09,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:22:09,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10604 states and 15706 transitions. [2020-10-29 13:22:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:22:09,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:09,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:09,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:22:09,179 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:09,180 INFO L82 PathProgramCache]: Analyzing trace with hash -807454488, now seen corresponding path program 1 times [2020-10-29 13:22:09,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:09,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100380704] [2020-10-29 13:22:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:09,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:09,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:09,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:09,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:10,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:10,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:22:10,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:22:10,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1190 [2020-10-29 13:22:10,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:10,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:22:10,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:22:10,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:22:10,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:10,655 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:22:10,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:10,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:10,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:10,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:10,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:10,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:22:10,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:10,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:10,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:22:10,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:10,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:22:10,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:10,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100380704] [2020-10-29 13:22:10,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:10,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:22:10,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260794106] [2020-10-29 13:22:10,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:22:10,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:10,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:22:10,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:22:10,696 INFO L87 Difference]: Start difference. First operand 10604 states and 15706 transitions. Second operand 6 states. [2020-10-29 13:22:10,961 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:22:11,707 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:22:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:15,871 INFO L93 Difference]: Finished difference Result 30739 states and 45914 transitions. [2020-10-29 13:22:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:22:15,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:22:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:15,900 INFO L225 Difference]: With dead ends: 30739 [2020-10-29 13:22:15,900 INFO L226 Difference]: Without dead ends: 20372 [2020-10-29 13:22:15,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:22:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20372 states. [2020-10-29 13:22:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20372 to 20369. [2020-10-29 13:22:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20369 states. [2020-10-29 13:22:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20369 states to 20369 states and 30275 transitions. [2020-10-29 13:22:20,592 INFO L78 Accepts]: Start accepts. Automaton has 20369 states and 30275 transitions. Word has length 73 [2020-10-29 13:22:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:20,593 INFO L481 AbstractCegarLoop]: Abstraction has 20369 states and 30275 transitions. [2020-10-29 13:22:20,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:22:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 20369 states and 30275 transitions. [2020-10-29 13:22:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:22:20,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:20,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:20,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:22:20,596 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:20,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:20,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1445068729, now seen corresponding path program 1 times [2020-10-29 13:22:20,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:20,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485734152] [2020-10-29 13:22:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:20,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:20,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:21,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:21,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:25,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:25,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:22:25,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:22:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:22:25,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:25,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:22:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:22:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:22:25,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:26,083 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:22:26,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:26,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:26,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:26,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:26,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:26,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:22:26,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:26,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:26,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:22:26,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:26,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:22:26,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:26,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485734152] [2020-10-29 13:22:26,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:26,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:22:26,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447491574] [2020-10-29 13:22:26,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:22:26,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:26,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:22:26,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:22:26,128 INFO L87 Difference]: Start difference. First operand 20369 states and 30275 transitions. Second operand 10 states. [2020-10-29 13:22:26,384 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:22:27,534 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:22:27,791 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:22:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:34,860 INFO L93 Difference]: Finished difference Result 50040 states and 74398 transitions. [2020-10-29 13:22:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:22:34,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-29 13:22:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:34,902 INFO L225 Difference]: With dead ends: 50040 [2020-10-29 13:22:34,902 INFO L226 Difference]: Without dead ends: 30307 [2020-10-29 13:22:34,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:22:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30307 states. [2020-10-29 13:22:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30307 to 20312. [2020-10-29 13:22:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20312 states. [2020-10-29 13:22:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20312 states to 20312 states and 30191 transitions. [2020-10-29 13:22:39,892 INFO L78 Accepts]: Start accepts. Automaton has 20312 states and 30191 transitions. Word has length 74 [2020-10-29 13:22:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:39,893 INFO L481 AbstractCegarLoop]: Abstraction has 20312 states and 30191 transitions. [2020-10-29 13:22:39,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:22:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20312 states and 30191 transitions. [2020-10-29 13:22:39,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:22:39,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:39,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:39,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:22:39,895 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:39,895 INFO L82 PathProgramCache]: Analyzing trace with hash 279341442, now seen corresponding path program 1 times [2020-10-29 13:22:39,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:39,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176194976] [2020-10-29 13:22:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:39,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:39,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:40,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:40,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:41,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:43,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:43,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:22:43,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:22:43,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4047 [2020-10-29 13:22:43,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:43,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:22:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:22:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:22:43,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:44,180 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 24 [2020-10-29 13:22:44,512 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:22:44,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:44,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:44,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:44,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:44,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:44,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:22:44,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:44,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:22:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:44,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:22:44,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:44,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176194976] [2020-10-29 13:22:44,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:44,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:22:44,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047451249] [2020-10-29 13:22:44,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:22:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:22:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:22:44,541 INFO L87 Difference]: Start difference. First operand 20312 states and 30191 transitions. Second operand 9 states. [2020-10-29 13:22:44,820 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:22:45,843 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:22:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:53,798 INFO L93 Difference]: Finished difference Result 50379 states and 74870 transitions. [2020-10-29 13:22:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:22:53,799 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-29 13:22:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:53,833 INFO L225 Difference]: With dead ends: 50379 [2020-10-29 13:22:53,833 INFO L226 Difference]: Without dead ends: 30307 [2020-10-29 13:22:53,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:22:53,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30307 states. [2020-10-29 13:22:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30307 to 20312. [2020-10-29 13:22:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20312 states. [2020-10-29 13:22:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20312 states to 20312 states and 30180 transitions. [2020-10-29 13:22:59,519 INFO L78 Accepts]: Start accepts. Automaton has 20312 states and 30180 transitions. Word has length 74 [2020-10-29 13:22:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:59,519 INFO L481 AbstractCegarLoop]: Abstraction has 20312 states and 30180 transitions. [2020-10-29 13:22:59,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:22:59,519 INFO L276 IsEmpty]: Start isEmpty. Operand 20312 states and 30180 transitions. [2020-10-29 13:22:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:22:59,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:59,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:59,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:22:59,522 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1599462499, now seen corresponding path program 1 times [2020-10-29 13:22:59,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:59,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410917610] [2020-10-29 13:22:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:59,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:59,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:59,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:22:59,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:22:59,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-29 13:22:59,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:59,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:59,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:22:59,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:22:59,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:22:59,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:00,191 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:23:00,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:23:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:00,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:00,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:00,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:23:00,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:23:00,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:23:00,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:00,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:00,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:23:00,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:23:00,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:23:00,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:23:00,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410917610] [2020-10-29 13:23:00,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:23:00,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:23:00,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358432035] [2020-10-29 13:23:00,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:23:00,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:23:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:23:00,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:23:00,239 INFO L87 Difference]: Start difference. First operand 20312 states and 30180 transitions. Second operand 6 states. [2020-10-29 13:23:00,532 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:23:01,253 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:23:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:23:05,604 INFO L93 Difference]: Finished difference Result 30094 states and 44904 transitions. [2020-10-29 13:23:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:23:05,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:23:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:23:05,621 INFO L225 Difference]: With dead ends: 30094 [2020-10-29 13:23:05,621 INFO L226 Difference]: Without dead ends: 15244 [2020-10-29 13:23:05,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:23:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15244 states. [2020-10-29 13:23:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15244 to 10353. [2020-10-29 13:23:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10353 states. [2020-10-29 13:23:08,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10353 states to 10353 states and 15377 transitions. [2020-10-29 13:23:08,789 INFO L78 Accepts]: Start accepts. Automaton has 10353 states and 15377 transitions. Word has length 75 [2020-10-29 13:23:08,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:23:08,789 INFO L481 AbstractCegarLoop]: Abstraction has 10353 states and 15377 transitions. [2020-10-29 13:23:08,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:23:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 10353 states and 15377 transitions. [2020-10-29 13:23:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:23:08,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:23:08,791 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] [2020-10-29 13:23:08,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:23:08,791 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:23:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:23:08,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2085205464, now seen corresponding path program 1 times [2020-10-29 13:23:08,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:23:08,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263122257] [2020-10-29 13:23:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:23:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:08,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:08,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:08,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:09,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:09,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:13,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:13,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:23:13,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:23:13,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4339 [2020-10-29 13:23:13,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:13,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:13,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:23:13,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:23:13,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:23:13,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:13,570 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:23:13,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:23:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:13,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:13,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:13,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:23:13,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:23:13,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:23:13,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:13,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:13,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:23:13,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:23:13,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:23:13,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:23:13,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263122257] [2020-10-29 13:23:13,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:23:13,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:23:13,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95735022] [2020-10-29 13:23:13,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:23:13,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:23:13,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:23:13,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:23:13,602 INFO L87 Difference]: Start difference. First operand 10353 states and 15377 transitions. Second operand 10 states. [2020-10-29 13:23:13,863 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:23:15,019 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:23:15,269 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:23:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:23:20,467 INFO L93 Difference]: Finished difference Result 25025 states and 37239 transitions. [2020-10-29 13:23:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:23:20,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-29 13:23:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:23:20,485 INFO L225 Difference]: With dead ends: 25025 [2020-10-29 13:23:20,485 INFO L226 Difference]: Without dead ends: 15187 [2020-10-29 13:23:20,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:23:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15187 states. [2020-10-29 13:23:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15187 to 10296. [2020-10-29 13:23:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10296 states. [2020-10-29 13:23:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10296 states to 10296 states and 15302 transitions. [2020-10-29 13:23:23,856 INFO L78 Accepts]: Start accepts. Automaton has 10296 states and 15302 transitions. Word has length 76 [2020-10-29 13:23:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:23:23,856 INFO L481 AbstractCegarLoop]: Abstraction has 10296 states and 15302 transitions. [2020-10-29 13:23:23,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:23:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 10296 states and 15302 transitions. [2020-10-29 13:23:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:23:23,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:23:23,858 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] [2020-10-29 13:23:23,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:23:23,858 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:23:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:23:23,859 INFO L82 PathProgramCache]: Analyzing trace with hash -991970935, now seen corresponding path program 1 times [2020-10-29 13:23:23,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:23:23,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17839859] [2020-10-29 13:23:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:23:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:23,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:23,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:24,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:24,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:24,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:25,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:27,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:27,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:23:27,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:23:27,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3831 [2020-10-29 13:23:27,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:27,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:27,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:23:27,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:23:27,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:23:27,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:27,944 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 18 [2020-10-29 13:23:28,190 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:23:28,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:23:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:28,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:28,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:28,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:23:28,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:23:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:23:28,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:28,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:23:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:23:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:23:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:23:28,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17839859] [2020-10-29 13:23:28,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:23:28,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:23:28,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138426604] [2020-10-29 13:23:28,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:23:28,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:23:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:23:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:23:28,221 INFO L87 Difference]: Start difference. First operand 10296 states and 15302 transitions. Second operand 9 states. [2020-10-29 13:23:28,506 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:23:29,432 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 147