/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=SHALLOWEST --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 [2020-10-27 05:17:33,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:17:33,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:17:33,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:17:33,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:17:33,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:17:33,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:17:33,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:17:33,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:17:33,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:17:33,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:17:33,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:17:33,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:17:33,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:17:33,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:17:33,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:17:33,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:17:33,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:17:33,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:17:33,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:17:33,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:17:33,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:17:33,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:17:33,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:17:33,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:17:33,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:17:33,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:17:33,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:17:33,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:17:33,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:17:33,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:17:33,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:17:33,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:17:33,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:17:33,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:17:33,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:17:33,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:17:33,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:17:33,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:17:33,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:17:33,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:17:33,517 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 [2020-10-27 05:17:33,552 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:17:33,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:17:33,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:17:33,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:17:33,555 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:17:33,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:17:33,555 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:17:33,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:17:33,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:17:33,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:17:33,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:17:33,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:17:33,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:17:33,557 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:17:33,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:17:33,557 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:17:33,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:17:33,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:17:33,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:17:33,558 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:17:33,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:17:33,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:17:33,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:17:33,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:17:33,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:17:33,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:17:33,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:17:33,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:17:33,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:17:33,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:17:34,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:17:34,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:17:34,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:17:34,035 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:17:34,036 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:17:34,037 INFO L432 ainManager$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 [2020-10-27 05:17:34,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e4313bca/80f9da8e3ab74783bf0cda68cffaa830/FLAGb059d4f7e [2020-10-27 05:17:34,899 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:17:34,900 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 [2020-10-27 05:17:34,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e4313bca/80f9da8e3ab74783bf0cda68cffaa830/FLAGb059d4f7e [2020-10-27 05:17:35,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e4313bca/80f9da8e3ab74783bf0cda68cffaa830 [2020-10-27 05:17:35,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:17:35,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:17:35,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:17:35,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:17:35,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:17:35,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:17:35" (1/1) ... [2020-10-27 05:17:35,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a81d6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35, skipping insertion in model container [2020-10-27 05:17:35,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:17:35" (1/1) ... [2020-10-27 05:17:35,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:17:35,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:17:35,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:17:35,764 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:17:35,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:17:35,882 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:17:35,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35 WrapperNode [2020-10-27 05:17:35,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:17:35,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:17:35,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:17:35,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:17:35,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35" (1/1) ... [2020-10-27 05:17:35,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35" (1/1) ... [2020-10-27 05:17:35,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35" (1/1) ... [2020-10-27 05:17:35,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35" (1/1) ... [2020-10-27 05:17:35,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35" (1/1) ... [2020-10-27 05:17:35,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35" (1/1) ... [2020-10-27 05:17:35,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35" (1/1) ... [2020-10-27 05:17:35,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:17:35,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:17:35,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:17:35,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:17:35,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35" (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 [2020-10-27 05:17:36,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:17:36,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:17:36,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:17:36,044 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:17:36,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:17:36,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:17:36,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:17:36,044 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:17:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:17:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:17:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:17:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:17:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:17:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:17:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:17:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:17:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:17:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:17:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:17:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:17:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:17:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:17:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:17:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:17:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:17:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:17:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:17:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:17:36,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:17:37,046 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:17:37,046 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:17:37,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:17:37 BoogieIcfgContainer [2020-10-27 05:17:37,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:17:37,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:17:37,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:17:37,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:17:37,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:17:35" (1/3) ... [2020-10-27 05:17:37,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615c81eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:17:37, skipping insertion in model container [2020-10-27 05:17:37,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:35" (2/3) ... [2020-10-27 05:17:37,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615c81eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:17:37, skipping insertion in model container [2020-10-27 05:17:37,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:17:37" (3/3) ... [2020-10-27 05:17:37,060 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:17:37,073 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:17:37,079 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:17:37,093 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:17:37,121 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:17:37,121 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:17:37,122 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:17:37,122 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:17:37,122 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:17:37,122 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:17:37,122 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:17:37,122 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:17:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-10-27 05:17:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:17:37,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:37,154 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] [2020-10-27 05:17:37,154 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash 350764180, now seen corresponding path program 1 times [2020-10-27 05:17:37,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:37,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453360351] [2020-10-27 05:17:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:37,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:37,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:37,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:38,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:38,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:38,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:38,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:42,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:42,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:17:42,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:17:42,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 05:17:42,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:42,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:17:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:17:42,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:17:43,194 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:43,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:43,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:43,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:43,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:43,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:43,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 05:17:43,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:43,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:43,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:43,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453360351] [2020-10-27 05:17:43,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:43,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:43,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207103558] [2020-10-27 05:17:43,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:17:43,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:43,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:17:43,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:17:43,401 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 6 states. [2020-10-27 05:17:43,981 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:17:45,381 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:17:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:45,865 INFO L93 Difference]: Finished difference Result 304 states and 495 transitions. [2020-10-27 05:17:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:17:45,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 05:17:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:45,889 INFO L225 Difference]: With dead ends: 304 [2020-10-27 05:17:45,889 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 05:17:45,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:17:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 05:17:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2020-10-27 05:17:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 05:17:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 273 transitions. [2020-10-27 05:17:45,958 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 273 transitions. Word has length 66 [2020-10-27 05:17:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:45,959 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 273 transitions. [2020-10-27 05:17:45,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:17:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 273 transitions. [2020-10-27 05:17:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:17:45,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:45,962 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] [2020-10-27 05:17:45,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:17:45,963 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:45,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:45,963 INFO L82 PathProgramCache]: Analyzing trace with hash 908153227, now seen corresponding path program 1 times [2020-10-27 05:17:45,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:45,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003539364] [2020-10-27 05:17:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:46,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:47,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:47,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:51,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:51,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:17:51,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:17:51,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:17:51,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:17:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:17:51,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:51,460 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:51,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:51,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:51,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:51,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:51,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:51,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:17:51,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:51,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:51,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:51,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:51,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:51,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003539364] [2020-10-27 05:17:51,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:51,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578490590] [2020-10-27 05:17:51,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:17:51,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:17:51,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:17:51,557 INFO L87 Difference]: Start difference. First operand 190 states and 273 transitions. Second operand 6 states. [2020-10-27 05:17:52,027 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:17:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:52,928 INFO L93 Difference]: Finished difference Result 335 states and 498 transitions. [2020-10-27 05:17:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:17:52,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 05:17:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:52,931 INFO L225 Difference]: With dead ends: 335 [2020-10-27 05:17:52,931 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 05:17:52,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:17:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 05:17:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-27 05:17:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 05:17:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 270 transitions. [2020-10-27 05:17:52,971 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 270 transitions. Word has length 67 [2020-10-27 05:17:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:52,972 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 270 transitions. [2020-10-27 05:17:52,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:17:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 270 transitions. [2020-10-27 05:17:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:17:52,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:52,978 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] [2020-10-27 05:17:52,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:17:52,978 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1697376957, now seen corresponding path program 1 times [2020-10-27 05:17:52,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:52,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342788790] [2020-10-27 05:17:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:53,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:53,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:53,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:53,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:53,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:53,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:53,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:53,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:54,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:54,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:55,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:55,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:56,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:57,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:57,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:58,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:58,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:17:58,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:17:58,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:17:58,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:17:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:17:58,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:58,477 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:17:58,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:58,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:58,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:58,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:58,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:58,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:17:58,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:58,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:58,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:58,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:58,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:17:58,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342788790] [2020-10-27 05:17:58,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:58,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:58,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67703455] [2020-10-27 05:17:58,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:17:58,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:17:58,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:17:58,546 INFO L87 Difference]: Start difference. First operand 190 states and 270 transitions. Second operand 6 states. [2020-10-27 05:17:58,995 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:17:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:59,777 INFO L93 Difference]: Finished difference Result 339 states and 497 transitions. [2020-10-27 05:17:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:17:59,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-27 05:17:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:59,782 INFO L225 Difference]: With dead ends: 339 [2020-10-27 05:17:59,782 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 05:17:59,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:17:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 05:17:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-27 05:17:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 05:17:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 267 transitions. [2020-10-27 05:17:59,819 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 267 transitions. Word has length 68 [2020-10-27 05:17:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:59,820 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 267 transitions. [2020-10-27 05:17:59,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:17:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 267 transitions. [2020-10-27 05:17:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:17:59,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:59,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:17:59,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:17:59,831 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:59,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1467552102, now seen corresponding path program 1 times [2020-10-27 05:17:59,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:59,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270353274] [2020-10-27 05:17:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:59,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:59,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:59,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:00,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:00,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:00,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:00,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:00,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:02,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:03,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:04,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:04,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:18:04,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:18:04,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:18:04,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:04,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:18:04,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:04,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 05:18:04,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:05,266 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:18:05,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:05,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:05,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:05,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:05,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:05,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:18:05,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:05,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:05,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270353274] [2020-10-27 05:18:05,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:05,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:18:05,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326828466] [2020-10-27 05:18:05,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:18:05,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:05,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:18:05,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:18:05,326 INFO L87 Difference]: Start difference. First operand 190 states and 267 transitions. Second operand 6 states. [2020-10-27 05:18:05,796 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:18:06,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:06,586 INFO L93 Difference]: Finished difference Result 343 states and 496 transitions. [2020-10-27 05:18:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:18:06,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-27 05:18:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:06,591 INFO L225 Difference]: With dead ends: 343 [2020-10-27 05:18:06,591 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 05:18:06,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:18:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 05:18:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-27 05:18:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 05:18:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 264 transitions. [2020-10-27 05:18:06,617 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 264 transitions. Word has length 69 [2020-10-27 05:18:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:06,617 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 264 transitions. [2020-10-27 05:18:06,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:18:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 264 transitions. [2020-10-27 05:18:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:18:06,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:06,620 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] [2020-10-27 05:18:06,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:18:06,620 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1443019214, now seen corresponding path program 1 times [2020-10-27 05:18:06,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:06,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415888090] [2020-10-27 05:18:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:06,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:06,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:06,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:06,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:07,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:07,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:09,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:10,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:10,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:10,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:11,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:11,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:18:11,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:18:11,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:18:11,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:18:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:18:11,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:18:12,367 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:18:12,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:12,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:12,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:12,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:12,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:12,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:18:12,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:12,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:12,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:12,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415888090] [2020-10-27 05:18:12,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:12,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:18:12,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726434286] [2020-10-27 05:18:12,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:18:12,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:12,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:18:12,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:18:12,467 INFO L87 Difference]: Start difference. First operand 190 states and 264 transitions. Second operand 11 states. [2020-10-27 05:18:13,033 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:18:14,641 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:18:15,084 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:18:15,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:15,751 INFO L93 Difference]: Finished difference Result 369 states and 534 transitions. [2020-10-27 05:18:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:18:15,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-27 05:18:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:15,754 INFO L225 Difference]: With dead ends: 369 [2020-10-27 05:18:15,754 INFO L226 Difference]: Without dead ends: 245 [2020-10-27 05:18:15,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:18:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-27 05:18:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 190. [2020-10-27 05:18:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 05:18:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 262 transitions. [2020-10-27 05:18:15,781 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 262 transitions. Word has length 70 [2020-10-27 05:18:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:15,782 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 262 transitions. [2020-10-27 05:18:15,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:18:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 262 transitions. [2020-10-27 05:18:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:18:15,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:15,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:15,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:18:15,784 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:15,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:15,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1095538447, now seen corresponding path program 1 times [2020-10-27 05:18:15,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:15,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180886427] [2020-10-27 05:18:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:15,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:15,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:15,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:16,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:16,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:16,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:16,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:16,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:16,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:18,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:20,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:20,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:18:20,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:18:20,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:18:20,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:18:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:20,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:18:20,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:21,112 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 20 [2020-10-27 05:18:21,668 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:18:21,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:21,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:21,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:21,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:21,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:21,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:18:21,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:21,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:21,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:21,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:21,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:21,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180886427] [2020-10-27 05:18:21,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:21,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:18:21,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544666632] [2020-10-27 05:18:21,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:18:21,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:18:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:18:21,734 INFO L87 Difference]: Start difference. First operand 190 states and 262 transitions. Second operand 13 states. [2020-10-27 05:18:22,923 WARN L193 SmtUtils]: Spent 990.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 157 [2020-10-27 05:18:23,345 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-27 05:18:23,640 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-10-27 05:18:24,000 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-27 05:18:24,339 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-10-27 05:18:24,618 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-10-27 05:18:24,766 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-10-27 05:18:25,151 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-27 05:18:25,398 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-27 05:18:26,095 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:18:27,072 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 160 [2020-10-27 05:18:28,596 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-27 05:18:29,067 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 05:18:29,489 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 05:18:29,763 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-27 05:18:30,044 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-27 05:18:30,685 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-27 05:18:32,366 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-27 05:18:32,803 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-27 05:18:33,414 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 05:18:34,426 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 155 [2020-10-27 05:18:35,225 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-10-27 05:18:35,388 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 05:18:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:35,468 INFO L93 Difference]: Finished difference Result 1822 states and 2672 transitions. [2020-10-27 05:18:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 05:18:35,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-10-27 05:18:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:35,480 INFO L225 Difference]: With dead ends: 1822 [2020-10-27 05:18:35,480 INFO L226 Difference]: Without dead ends: 1708 [2020-10-27 05:18:35,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=702, Invalid=2838, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 05:18:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-10-27 05:18:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 196. [2020-10-27 05:18:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 05:18:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 268 transitions. [2020-10-27 05:18:35,537 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 268 transitions. Word has length 71 [2020-10-27 05:18:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:35,538 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 268 transitions. [2020-10-27 05:18:35,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:18:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 268 transitions. [2020-10-27 05:18:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:18:35,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:35,540 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] [2020-10-27 05:18:35,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:18:35,540 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:35,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1301783880, now seen corresponding path program 1 times [2020-10-27 05:18:35,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:35,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420371152] [2020-10-27 05:18:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:35,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:35,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:35,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:35,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:35,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:36,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:36,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:36,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:37,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:40,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:40,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:18:40,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:18:40,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:18:40,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:18:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:18:40,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:40,865 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2020-10-27 05:18:41,490 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:18:41,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:41,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:41,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:41,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:41,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:41,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:18:41,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:41,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:41,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:41,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:41,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:41,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420371152] [2020-10-27 05:18:41,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:41,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:18:41,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340321880] [2020-10-27 05:18:41,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:18:41,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:41,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:18:41,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:18:41,566 INFO L87 Difference]: Start difference. First operand 196 states and 268 transitions. Second operand 13 states. [2020-10-27 05:18:42,137 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:18:42,675 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-27 05:18:42,835 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-27 05:18:43,159 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 05:18:43,486 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-27 05:18:43,650 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-27 05:18:43,803 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-10-27 05:18:43,965 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-27 05:18:44,220 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-27 05:18:44,419 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-27 05:18:45,141 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 05:18:45,700 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:18:46,728 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-27 05:18:47,033 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-10-27 05:18:48,309 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-27 05:18:49,166 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:18:49,644 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:18:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:50,051 INFO L93 Difference]: Finished difference Result 1170 states and 1726 transitions. [2020-10-27 05:18:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:18:50,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-27 05:18:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:50,058 INFO L225 Difference]: With dead ends: 1170 [2020-10-27 05:18:50,059 INFO L226 Difference]: Without dead ends: 1066 [2020-10-27 05:18:50,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:18:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-10-27 05:18:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 202. [2020-10-27 05:18:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-27 05:18:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 274 transitions. [2020-10-27 05:18:50,111 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 274 transitions. Word has length 72 [2020-10-27 05:18:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:50,113 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 274 transitions. [2020-10-27 05:18:50,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:18:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 274 transitions. [2020-10-27 05:18:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:18:50,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:50,116 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] [2020-10-27 05:18:50,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:18:50,116 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:50,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1354192264, now seen corresponding path program 1 times [2020-10-27 05:18:50,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:50,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600056032] [2020-10-27 05:18:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:50,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:50,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:50,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:50,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:50,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:50,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:50,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:50,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:51,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:51,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:51,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:51,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:52,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:55,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:55,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:18:55,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:18:55,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:18:55,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:55,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:18:55,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:18:55,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:55,749 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:18:55,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:55,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:55,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:55,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:55,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:55,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:18:55,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:55,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:55,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:55,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:55,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600056032] [2020-10-27 05:18:55,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:55,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:18:55,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702566596] [2020-10-27 05:18:55,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:18:55,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:18:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:18:55,823 INFO L87 Difference]: Start difference. First operand 202 states and 274 transitions. Second operand 11 states. [2020-10-27 05:18:56,309 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:18:57,751 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:18:58,233 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:18:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:59,129 INFO L93 Difference]: Finished difference Result 450 states and 644 transitions. [2020-10-27 05:18:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:18:59,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:18:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:59,132 INFO L225 Difference]: With dead ends: 450 [2020-10-27 05:18:59,132 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 05:18:59,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:18:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 05:18:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 196. [2020-10-27 05:18:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 05:18:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 266 transitions. [2020-10-27 05:18:59,180 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 266 transitions. Word has length 72 [2020-10-27 05:18:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:59,181 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 266 transitions. [2020-10-27 05:18:59,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:18:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 266 transitions. [2020-10-27 05:18:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:18:59,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:59,182 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] [2020-10-27 05:18:59,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:18:59,183 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:59,183 INFO L82 PathProgramCache]: Analyzing trace with hash 770976462, now seen corresponding path program 1 times [2020-10-27 05:18:59,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:59,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117521342] [2020-10-27 05:18:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:59,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:59,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:59,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:59,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:59,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:00,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:00,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:00,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:01,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:04,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:04,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:19:04,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:19:04,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:19:04,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:04,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:19:04,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:04,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:19:04,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:04,502 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15 [2020-10-27 05:19:04,962 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:19:04,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:04,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:04,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:04,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:04,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:04,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:19:04,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:04,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:04,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:04,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:04,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117521342] [2020-10-27 05:19:05,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:05,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:19:05,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431658874] [2020-10-27 05:19:05,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:19:05,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:19:05,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:19:05,016 INFO L87 Difference]: Start difference. First operand 196 states and 266 transitions. Second operand 11 states. [2020-10-27 05:19:05,543 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:19:07,552 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 150 [2020-10-27 05:19:08,025 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:19:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:09,127 INFO L93 Difference]: Finished difference Result 418 states and 598 transitions. [2020-10-27 05:19:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:19:09,135 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-10-27 05:19:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:09,136 INFO L225 Difference]: With dead ends: 418 [2020-10-27 05:19:09,136 INFO L226 Difference]: Without dead ends: 314 [2020-10-27 05:19:09,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:19:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-27 05:19:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 190. [2020-10-27 05:19:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 05:19:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 258 transitions. [2020-10-27 05:19:09,181 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 258 transitions. Word has length 73 [2020-10-27 05:19:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:09,182 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 258 transitions. [2020-10-27 05:19:09,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:19:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 258 transitions. [2020-10-27 05:19:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:19:09,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:09,183 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] [2020-10-27 05:19:09,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:19:09,183 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:09,184 INFO L82 PathProgramCache]: Analyzing trace with hash -527836167, now seen corresponding path program 1 times [2020-10-27 05:19:09,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:09,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633834458] [2020-10-27 05:19:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:09,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:09,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:09,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:09,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:09,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:13,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:13,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:19:13,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:19:13,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4537 [2020-10-27 05:19:13,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:13,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:19:13,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:13,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:19:13,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:13,974 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2020-10-27 05:19:14,487 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:19:14,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:14,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:14,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:14,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:14,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:14,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:19:14,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:14,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:14,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:14,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633834458] [2020-10-27 05:19:14,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:14,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:19:14,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270822533] [2020-10-27 05:19:14,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:19:14,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:19:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:19:14,536 INFO L87 Difference]: Start difference. First operand 190 states and 258 transitions. Second operand 12 states. [2020-10-27 05:19:15,575 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 155 [2020-10-27 05:19:16,146 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-27 05:19:16,317 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-27 05:19:16,593 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-10-27 05:19:16,731 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-10-27 05:19:18,256 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 151 [2020-10-27 05:19:19,213 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 150 [2020-10-27 05:19:20,248 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-27 05:19:21,109 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-27 05:19:21,452 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-27 05:19:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:21,530 INFO L93 Difference]: Finished difference Result 725 states and 1053 transitions. [2020-10-27 05:19:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:19:21,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-10-27 05:19:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:21,535 INFO L225 Difference]: With dead ends: 725 [2020-10-27 05:19:21,535 INFO L226 Difference]: Without dead ends: 622 [2020-10-27 05:19:21,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:19:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-10-27 05:19:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 205. [2020-10-27 05:19:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-27 05:19:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2020-10-27 05:19:21,591 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 73 [2020-10-27 05:19:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:21,591 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2020-10-27 05:19:21,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:19:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2020-10-27 05:19:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:19:21,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:21,593 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] [2020-10-27 05:19:21,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:19:21,593 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash 867090822, now seen corresponding path program 1 times [2020-10-27 05:19:21,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:21,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47482230] [2020-10-27 05:19:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:21,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:22,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:26,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:26,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:19:26,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:19:26,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4589 [2020-10-27 05:19:26,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:26,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 05:19:26,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:19:26,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:19:26,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:26,839 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-10-27 05:19:27,014 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-27 05:19:27,394 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-10-27 05:19:27,600 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 05:19:27,868 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 05:19:28,179 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-27 05:19:29,320 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:19:29,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:29,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:29,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:29,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:29,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:29,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:19:29,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:29,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:19:29,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:29,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:19:29,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:29,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47482230] [2020-10-27 05:19:29,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:29,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-27 05:19:29,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777128480] [2020-10-27 05:19:29,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 05:19:29,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:29,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 05:19:29,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:19:29,380 INFO L87 Difference]: Start difference. First operand 205 states and 277 transitions. Second operand 23 states. [2020-10-27 05:19:29,702 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 05:19:30,698 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 05:19:31,461 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-27 05:19:31,820 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 05:19:32,319 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-10-27 05:19:32,922 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2020-10-27 05:19:33,648 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 111 [2020-10-27 05:19:34,611 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 131 [2020-10-27 05:19:35,289 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 05:19:35,667 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 05:19:36,189 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-27 05:19:36,619 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-27 05:19:36,800 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 05:19:37,665 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 05:19:38,091 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 05:19:39,342 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:19:40,062 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:19:40,625 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:19:41,241 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:19:42,046 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:19:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:47,168 INFO L93 Difference]: Finished difference Result 1248 states and 1849 transitions. [2020-10-27 05:19:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:19:47,171 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2020-10-27 05:19:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:47,176 INFO L225 Difference]: With dead ends: 1248 [2020-10-27 05:19:47,177 INFO L226 Difference]: Without dead ends: 1145 [2020-10-27 05:19:47,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=369, Invalid=2283, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 05:19:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2020-10-27 05:19:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 215. [2020-10-27 05:19:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 05:19:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 289 transitions. [2020-10-27 05:19:47,255 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 289 transitions. Word has length 74 [2020-10-27 05:19:47,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:47,255 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 289 transitions. [2020-10-27 05:19:47,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 05:19:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 289 transitions. [2020-10-27 05:19:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:19:47,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:47,257 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] [2020-10-27 05:19:47,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:19:47,257 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:47,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1067505996, now seen corresponding path program 1 times [2020-10-27 05:19:47,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:47,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034255738] [2020-10-27 05:19:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:47,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:48,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:51,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:51,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:19:51,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:19:51,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4159 [2020-10-27 05:19:51,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:19:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:19:51,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:51,882 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2020-10-27 05:19:52,444 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:19:52,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:52,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:52,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:52,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:52,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:52,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:19:52,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:52,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:52,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:52,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:52,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:52,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034255738] [2020-10-27 05:19:52,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:52,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:19:52,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765410253] [2020-10-27 05:19:52,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:19:52,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:19:52,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:19:52,496 INFO L87 Difference]: Start difference. First operand 215 states and 289 transitions. Second operand 15 states. [2020-10-27 05:19:53,762 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2020-10-27 05:19:54,692 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-27 05:19:54,851 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-27 05:19:55,046 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-27 05:19:55,782 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-10-27 05:19:56,761 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:19:57,182 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:19:58,124 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 149 [2020-10-27 05:20:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:00,245 INFO L93 Difference]: Finished difference Result 847 states and 1246 transitions. [2020-10-27 05:20:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:20:00,246 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-27 05:20:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:00,249 INFO L225 Difference]: With dead ends: 847 [2020-10-27 05:20:00,250 INFO L226 Difference]: Without dead ends: 725 [2020-10-27 05:20:00,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 05:20:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-27 05:20:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 200. [2020-10-27 05:20:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 05:20:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 269 transitions. [2020-10-27 05:20:00,318 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 269 transitions. Word has length 74 [2020-10-27 05:20:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:00,318 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 269 transitions. [2020-10-27 05:20:00,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:20:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 269 transitions. [2020-10-27 05:20:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:20:00,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:00,319 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] [2020-10-27 05:20:00,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:20:00,320 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash 490066758, now seen corresponding path program 1 times [2020-10-27 05:20:00,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:00,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44281310] [2020-10-27 05:20:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:00,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:00,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:00,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:00,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:00,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:20:00,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:20:00,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-27 05:20:00,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:20:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:20:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:20:00,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:01,152 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:20:01,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:01,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:01,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:01,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:01,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:01,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:20:01,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:01,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:01,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:01,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:01,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:01,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44281310] [2020-10-27 05:20:01,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:01,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:20:01,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345762271] [2020-10-27 05:20:01,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:20:01,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:01,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:20:01,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:20:01,208 INFO L87 Difference]: Start difference. First operand 200 states and 269 transitions. Second operand 7 states. [2020-10-27 05:20:01,743 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:20:02,898 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:20:03,388 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:20:03,831 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:20:04,458 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:20:04,935 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:20:05,421 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:20:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:06,611 INFO L93 Difference]: Finished difference Result 1078 states and 1589 transitions. [2020-10-27 05:20:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:20:06,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-27 05:20:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:06,617 INFO L225 Difference]: With dead ends: 1078 [2020-10-27 05:20:06,617 INFO L226 Difference]: Without dead ends: 976 [2020-10-27 05:20:06,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:20:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-10-27 05:20:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 331. [2020-10-27 05:20:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-27 05:20:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 460 transitions. [2020-10-27 05:20:06,745 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 460 transitions. Word has length 75 [2020-10-27 05:20:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:06,745 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 460 transitions. [2020-10-27 05:20:06,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:20:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 460 transitions. [2020-10-27 05:20:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:20:06,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:06,746 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] [2020-10-27 05:20:06,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:20:06,747 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:06,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:06,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1388155142, now seen corresponding path program 1 times [2020-10-27 05:20:06,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:06,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166833906] [2020-10-27 05:20:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:06,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:06,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:07,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:07,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:08,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:11,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:11,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:20:11,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:20:11,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:20:11,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 05:20:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:20:11,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:20:11,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:12,183 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-27 05:20:12,630 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-27 05:20:12,807 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 05:20:13,020 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 05:20:13,365 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-27 05:20:14,050 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2020-10-27 05:20:15,194 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:20:15,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:15,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:15,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:15,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:15,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:15,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:20:15,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:15,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:15,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:15,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:15,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:15,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166833906] [2020-10-27 05:20:15,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:15,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-27 05:20:15,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872526925] [2020-10-27 05:20:15,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 05:20:15,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 05:20:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:20:15,255 INFO L87 Difference]: Start difference. First operand 331 states and 460 transitions. Second operand 23 states. [2020-10-27 05:20:15,692 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-27 05:20:17,215 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 209 DAG size of output: 207 [2020-10-27 05:20:18,037 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 05:20:18,409 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-27 05:20:18,961 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-27 05:20:19,543 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-27 05:20:20,312 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2020-10-27 05:20:21,160 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-10-27 05:20:22,427 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 165 DAG size of output: 158 [2020-10-27 05:20:22,801 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 05:20:23,194 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 05:20:23,580 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-27 05:20:23,959 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 05:20:24,289 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-27 05:20:24,652 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 05:20:27,972 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:28,568 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:20:29,479 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:30,099 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:20:31,106 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 05:20:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:38,132 INFO L93 Difference]: Finished difference Result 2417 states and 3600 transitions. [2020-10-27 05:20:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 05:20:38,133 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2020-10-27 05:20:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:38,143 INFO L225 Difference]: With dead ends: 2417 [2020-10-27 05:20:38,143 INFO L226 Difference]: Without dead ends: 2215 [2020-10-27 05:20:38,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=381, Invalid=2169, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 05:20:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-10-27 05:20:38,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 341. [2020-10-27 05:20:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-27 05:20:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 472 transitions. [2020-10-27 05:20:38,264 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 472 transitions. Word has length 75 [2020-10-27 05:20:38,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:38,264 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 472 transitions. [2020-10-27 05:20:38,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 05:20:38,264 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 472 transitions. [2020-10-27 05:20:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:20:38,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:38,265 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] [2020-10-27 05:20:38,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:20:38,266 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:38,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:38,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1009519621, now seen corresponding path program 1 times [2020-10-27 05:20:38,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:38,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903518333] [2020-10-27 05:20:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:38,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:38,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:41,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:41,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:20:41,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:20:41,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3325 [2020-10-27 05:20:41,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:20:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:20:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:20:41,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:42,107 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 18 [2020-10-27 05:20:42,566 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:20:42,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:42,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:42,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:42,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:42,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:42,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:20:42,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:42,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:42,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:42,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903518333] [2020-10-27 05:20:42,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:42,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:20:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291181241] [2020-10-27 05:20:42,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:20:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:42,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:20:42,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:20:42,609 INFO L87 Difference]: Start difference. First operand 341 states and 472 transitions. Second operand 10 states. [2020-10-27 05:20:43,141 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:20:44,718 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:20:45,229 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:20:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:46,180 INFO L93 Difference]: Finished difference Result 789 states and 1138 transitions. [2020-10-27 05:20:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:20:46,186 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 05:20:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:46,189 INFO L225 Difference]: With dead ends: 789 [2020-10-27 05:20:46,190 INFO L226 Difference]: Without dead ends: 566 [2020-10-27 05:20:46,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:20:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-10-27 05:20:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 339. [2020-10-27 05:20:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-27 05:20:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 464 transitions. [2020-10-27 05:20:46,372 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 464 transitions. Word has length 76 [2020-10-27 05:20:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:46,372 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 464 transitions. [2020-10-27 05:20:46,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:20:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 464 transitions. [2020-10-27 05:20:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:20:46,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:46,374 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] [2020-10-27 05:20:46,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:20:46,374 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:46,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:46,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1232060233, now seen corresponding path program 1 times [2020-10-27 05:20:46,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:46,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925740740] [2020-10-27 05:20:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:46,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:46,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:46,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:48,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:48,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:20:48,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:20:48,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1948 [2020-10-27 05:20:48,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:48,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:20:48,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:20:48,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:20:48,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:48,627 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-10-27 05:20:48,861 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 18 [2020-10-27 05:20:49,342 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:20:49,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:49,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:49,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:49,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:49,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:49,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:20:49,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:49,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:49,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:49,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:49,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:49,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925740740] [2020-10-27 05:20:49,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:49,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:20:49,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971895120] [2020-10-27 05:20:49,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:20:49,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:49,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:20:49,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:20:49,385 INFO L87 Difference]: Start difference. First operand 339 states and 464 transitions. Second operand 10 states. [2020-10-27 05:20:49,953 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 05:20:50,297 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-10-27 05:20:50,562 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-27 05:20:50,787 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-27 05:20:51,024 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-27 05:20:51,602 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-27 05:20:52,786 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 160 [2020-10-27 05:20:53,281 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:20:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:53,883 INFO L93 Difference]: Finished difference Result 762 states and 1099 transitions. [2020-10-27 05:20:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:20:53,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 05:20:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:53,887 INFO L225 Difference]: With dead ends: 762 [2020-10-27 05:20:53,888 INFO L226 Difference]: Without dead ends: 559 [2020-10-27 05:20:53,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:20:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-10-27 05:20:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 336. [2020-10-27 05:20:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-27 05:20:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 457 transitions. [2020-10-27 05:20:54,070 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 457 transitions. Word has length 76 [2020-10-27 05:20:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:54,070 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 457 transitions. [2020-10-27 05:20:54,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:20:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 457 transitions. [2020-10-27 05:20:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:20:54,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:54,072 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] [2020-10-27 05:20:54,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:20:54,072 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:54,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1630043035, now seen corresponding path program 1 times [2020-10-27 05:20:54,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:54,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194721158] [2020-10-27 05:20:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:54,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:54,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:54,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:54,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:58,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:58,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:20:58,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:20:58,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3931 [2020-10-27 05:20:58,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:20:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:20:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:20:58,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:58,507 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 24 [2020-10-27 05:20:58,989 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:20:58,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:58,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:59,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:59,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:59,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:59,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:20:59,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:59,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:59,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:59,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:59,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194721158] [2020-10-27 05:20:59,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:59,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:20:59,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783735177] [2020-10-27 05:20:59,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:20:59,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:59,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:20:59,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:20:59,031 INFO L87 Difference]: Start difference. First operand 336 states and 457 transitions. Second operand 10 states. [2020-10-27 05:20:59,551 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:21:01,396 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:21:01,879 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:21:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:02,510 INFO L93 Difference]: Finished difference Result 651 states and 928 transitions. [2020-10-27 05:21:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:21:02,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 05:21:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:02,514 INFO L225 Difference]: With dead ends: 651 [2020-10-27 05:21:02,514 INFO L226 Difference]: Without dead ends: 424 [2020-10-27 05:21:02,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:21:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-27 05:21:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 321. [2020-10-27 05:21:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-27 05:21:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 437 transitions. [2020-10-27 05:21:02,630 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 437 transitions. Word has length 76 [2020-10-27 05:21:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:02,630 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 437 transitions. [2020-10-27 05:21:02,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:21:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 437 transitions. [2020-10-27 05:21:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:21:02,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:02,631 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] [2020-10-27 05:21:02,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:21:02,631 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:02,632 INFO L82 PathProgramCache]: Analyzing trace with hash -536808506, now seen corresponding path program 1 times [2020-10-27 05:21:02,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:02,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995462014] [2020-10-27 05:21:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:02,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:02,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:02,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:03,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:05,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:05,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:21:05,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:21:05,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3147 [2020-10-27 05:21:05,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:05,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:21:05,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:21:05,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:21:05,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:06,079 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 18 [2020-10-27 05:21:06,497 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:21:06,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:06,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:06,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:06,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:06,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:21:06,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:06,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995462014] [2020-10-27 05:21:06,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:06,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:21:06,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998048005] [2020-10-27 05:21:06,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:21:06,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:06,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:21:06,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:21:06,534 INFO L87 Difference]: Start difference. First operand 321 states and 437 transitions. Second operand 9 states. [2020-10-27 05:21:07,017 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:21:08,366 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:21:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:09,289 INFO L93 Difference]: Finished difference Result 725 states and 1047 transitions. [2020-10-27 05:21:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:21:09,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 76 [2020-10-27 05:21:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:09,292 INFO L225 Difference]: With dead ends: 725 [2020-10-27 05:21:09,292 INFO L226 Difference]: Without dead ends: 500 [2020-10-27 05:21:09,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:21:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-10-27 05:21:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 297. [2020-10-27 05:21:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-27 05:21:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 408 transitions. [2020-10-27 05:21:09,438 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 408 transitions. Word has length 76 [2020-10-27 05:21:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:09,439 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 408 transitions. [2020-10-27 05:21:09,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:21:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 408 transitions. [2020-10-27 05:21:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:21:09,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:09,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:09,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:21:09,440 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:09,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:09,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1772942771, now seen corresponding path program 1 times [2020-10-27 05:21:09,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:09,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155986830] [2020-10-27 05:21:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:09,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:09,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:09,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:09,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:21:09,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:21:09,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-27 05:21:09,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:21:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:21:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:21:09,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:10,306 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:21:10,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:10,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:10,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:10,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:10,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:10,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:21:10,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:10,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:10,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155986830] [2020-10-27 05:21:10,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:10,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:21:10,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834621344] [2020-10-27 05:21:10,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:21:10,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:10,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:21:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:21:10,374 INFO L87 Difference]: Start difference. First operand 297 states and 408 transitions. Second operand 7 states. [2020-10-27 05:21:10,973 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:21:12,615 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:21:13,153 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:21:13,652 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:21:14,274 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:21:14,808 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:21:15,293 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:21:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:15,485 INFO L93 Difference]: Finished difference Result 1113 states and 1632 transitions. [2020-10-27 05:21:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:21:15,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-10-27 05:21:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:15,491 INFO L225 Difference]: With dead ends: 1113 [2020-10-27 05:21:15,491 INFO L226 Difference]: Without dead ends: 912 [2020-10-27 05:21:15,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:21:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2020-10-27 05:21:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 297. [2020-10-27 05:21:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-27 05:21:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 406 transitions. [2020-10-27 05:21:15,622 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 406 transitions. Word has length 77 [2020-10-27 05:21:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:15,622 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 406 transitions. [2020-10-27 05:21:15,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:21:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 406 transitions. [2020-10-27 05:21:15,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:21:15,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:15,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:15,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:21:15,624 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:15,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:15,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1496587340, now seen corresponding path program 1 times [2020-10-27 05:21:15,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:15,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892070730] [2020-10-27 05:21:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:15,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:15,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:15,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:15,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:15,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:21:15,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:21:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 05:21:15,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:21:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:21:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:21:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:16,373 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:21:16,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:16,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:16,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:16,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:16,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:16,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:21:16,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:16,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:16,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:16,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:16,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:16,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892070730] [2020-10-27 05:21:16,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:16,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:21:16,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517169518] [2020-10-27 05:21:16,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:21:16,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:21:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:21:16,419 INFO L87 Difference]: Start difference. First operand 297 states and 406 transitions. Second operand 5 states.