/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.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:11:45,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:11:45,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:11:45,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:11:45,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:11:45,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:11:45,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:11:45,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:11:45,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:11:45,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:11:45,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:11:45,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:11:45,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:11:45,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:11:45,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:11:45,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:11:45,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:11:45,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:11:45,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:11:45,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:11:45,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:11:45,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:11:45,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:11:45,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:11:45,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:11:45,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:11:45,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:11:45,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:11:45,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:11:45,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:11:45,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:11:45,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:11:45,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:11:45,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:11:45,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:11:45,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:11:45,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:11:45,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:11:45,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:11:45,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:11:45,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:11:45,655 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 05:11:45,681 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:11:45,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:11:45,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:11:45,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:11:45,683 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:11:45,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:11:45,684 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:11:45,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:11:45,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:11:45,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:11:45,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:11:45,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:11:45,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:11:45,685 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:11:45,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:11:45,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:11:45,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:11:45,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:11:45,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:11:45,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:11:45,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:11:45,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:11:45,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:11:45,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:11:45,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:11:45,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:11:45,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:11:45,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:11:45,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:11:45,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:11:46,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:11:46,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:11:46,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:11:46,092 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:11:46,093 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:11:46,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:11:46,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b85c4ef10/d3e1fcacf4b64b6486b5efcaf6371d62/FLAG380a480c5 [2020-10-27 05:11:46,974 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:11:46,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:11:46,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b85c4ef10/d3e1fcacf4b64b6486b5efcaf6371d62/FLAG380a480c5 [2020-10-27 05:11:47,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b85c4ef10/d3e1fcacf4b64b6486b5efcaf6371d62 [2020-10-27 05:11:47,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:11:47,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:11:47,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:11:47,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:11:47,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:11:47,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:11:47" (1/1) ... [2020-10-27 05:11:47,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a52b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47, skipping insertion in model container [2020-10-27 05:11:47,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:11:47" (1/1) ... [2020-10-27 05:11:47,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:11:47,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:11:47,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:11:47,691 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:11:47,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:11:47,791 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:11:47,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47 WrapperNode [2020-10-27 05:11:47,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:11:47,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:11:47,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:11:47,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:11:47,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47" (1/1) ... [2020-10-27 05:11:47,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47" (1/1) ... [2020-10-27 05:11:47,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47" (1/1) ... [2020-10-27 05:11:47,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47" (1/1) ... [2020-10-27 05:11:47,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47" (1/1) ... [2020-10-27 05:11:47,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47" (1/1) ... [2020-10-27 05:11:47,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47" (1/1) ... [2020-10-27 05:11:47,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:11:47,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:11:47,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:11:47,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:11:47,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47" (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 05:11:47,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:11:47,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:11:47,954 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:11:47,954 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:11:47,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:11:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:11:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:11:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:11:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:11:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:11:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:11:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:11:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:11:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:11:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:11:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:11:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:11:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:11:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:11:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:11:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:11:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:11:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:11:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:11:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:11:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:11:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:11:48,769 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:11:48,770 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:11:48,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:11:48 BoogieIcfgContainer [2020-10-27 05:11:48,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:11:48,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:11:48,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:11:48,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:11:48,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:11:47" (1/3) ... [2020-10-27 05:11:48,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d69d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:11:48, skipping insertion in model container [2020-10-27 05:11:48,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:47" (2/3) ... [2020-10-27 05:11:48,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d69d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:11:48, skipping insertion in model container [2020-10-27 05:11:48,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:11:48" (3/3) ... [2020-10-27 05:11:48,782 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:11:48,795 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:11:48,801 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:11:48,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:11:48,848 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:11:48,849 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:11:48,849 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:11:48,849 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:11:48,849 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:11:48,849 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:11:48,850 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:11:48,850 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:11:48,870 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-27 05:11:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:11:48,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:48,880 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] [2020-10-27 05:11:48,880 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:48,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1094105252, now seen corresponding path program 1 times [2020-10-27 05:11:48,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:48,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146856409] [2020-10-27 05:11:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:49,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:51,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:54,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:54,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:11:54,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:11:54,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 05:11:54,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:11:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:54,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:11:54,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 05:11:54,635 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:11:54,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:54,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:54,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:54,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:54,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:54,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 05:11:54,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:54,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:54,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:54,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:54,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:54,758 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 05:11:54,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146856409] [2020-10-27 05:11:54,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:54,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:11:54,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108115411] [2020-10-27 05:11:54,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:11:54,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:11:54,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:11:54,794 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 6 states. [2020-10-27 05:11:55,145 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:11:55,874 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:11:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:56,134 INFO L93 Difference]: Finished difference Result 258 states and 421 transitions. [2020-10-27 05:11:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:11:56,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 05:11:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:56,151 INFO L225 Difference]: With dead ends: 258 [2020-10-27 05:11:56,151 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 05:11:56,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:11:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 05:11:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2020-10-27 05:11:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 05:11:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 220 transitions. [2020-10-27 05:11:56,226 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 220 transitions. Word has length 53 [2020-10-27 05:11:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:56,226 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 220 transitions. [2020-10-27 05:11:56,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 220 transitions. [2020-10-27 05:11:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:11:56,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:56,229 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] [2020-10-27 05:11:56,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:11:56,230 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:56,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1321190962, now seen corresponding path program 1 times [2020-10-27 05:11:56,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:56,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130672117] [2020-10-27 05:11:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:56,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:56,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:56,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:56,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:56,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:57,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:01,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:12:01,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:12:01,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:12:01,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:12:01,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:01,514 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:01,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:01,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:01,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:01,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:01,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:12:01,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:01,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:01,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:01,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:01,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:01,579 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 05:12:01,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130672117] [2020-10-27 05:12:01,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:01,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:12:01,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755745348] [2020-10-27 05:12:01,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:01,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:01,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:01,596 INFO L87 Difference]: Start difference. First operand 157 states and 220 transitions. Second operand 6 states. [2020-10-27 05:12:01,816 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:12:02,292 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:12:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:02,510 INFO L93 Difference]: Finished difference Result 396 states and 577 transitions. [2020-10-27 05:12:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:12:02,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 05:12:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:02,517 INFO L225 Difference]: With dead ends: 396 [2020-10-27 05:12:02,517 INFO L226 Difference]: Without dead ends: 266 [2020-10-27 05:12:02,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:12:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-27 05:12:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 261. [2020-10-27 05:12:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 05:12:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 378 transitions. [2020-10-27 05:12:02,597 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 378 transitions. Word has length 54 [2020-10-27 05:12:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:02,597 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 378 transitions. [2020-10-27 05:12:02,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:12:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 378 transitions. [2020-10-27 05:12:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:02,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:02,604 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] [2020-10-27 05:12:02,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:12:02,605 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:02,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1144239917, now seen corresponding path program 1 times [2020-10-27 05:12:02,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:02,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057772121] [2020-10-27 05:12:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:02,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:04,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:05,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:07,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:07,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:12:07,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:12:07,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:07,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:07,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:07,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:12:07,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:08,001 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:08,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:08,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:08,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:08,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:08,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:08,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:12:08,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:08,059 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 05:12:08,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057772121] [2020-10-27 05:12:08,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:08,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:08,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368610892] [2020-10-27 05:12:08,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:08,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:08,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:08,064 INFO L87 Difference]: Start difference. First operand 261 states and 378 transitions. Second operand 11 states. [2020-10-27 05:12:08,298 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:12:09,119 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:12:09,365 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:12:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:09,833 INFO L93 Difference]: Finished difference Result 532 states and 789 transitions. [2020-10-27 05:12:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:12:09,834 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 05:12:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:09,841 INFO L225 Difference]: With dead ends: 532 [2020-10-27 05:12:09,841 INFO L226 Difference]: Without dead ends: 349 [2020-10-27 05:12:09,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:12:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-27 05:12:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 261. [2020-10-27 05:12:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 05:12:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 376 transitions. [2020-10-27 05:12:09,893 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 376 transitions. Word has length 55 [2020-10-27 05:12:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:09,896 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 376 transitions. [2020-10-27 05:12:09,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 376 transitions. [2020-10-27 05:12:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:12:09,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:09,905 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] [2020-10-27 05:12:09,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:12:09,906 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:09,906 INFO L82 PathProgramCache]: Analyzing trace with hash 613122306, now seen corresponding path program 1 times [2020-10-27 05:12:09,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:09,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588858978] [2020-10-27 05:12:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:09,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:12,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:14,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:12:14,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:12:14,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:12:14,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:14,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:14,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:14,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:12:14,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:12:15,298 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:15,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:15,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:15,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:15,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:15,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:12:15,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:15,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:15,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:15,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:15,378 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 05:12:15,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588858978] [2020-10-27 05:12:15,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:15,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:15,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14129802] [2020-10-27 05:12:15,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:15,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:15,384 INFO L87 Difference]: Start difference. First operand 261 states and 376 transitions. Second operand 11 states. [2020-10-27 05:12:15,599 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:12:16,267 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:12:16,490 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:12:17,400 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:12:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:17,510 INFO L93 Difference]: Finished difference Result 691 states and 1031 transitions. [2020-10-27 05:12:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:12:17,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:12:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:17,515 INFO L225 Difference]: With dead ends: 691 [2020-10-27 05:12:17,515 INFO L226 Difference]: Without dead ends: 506 [2020-10-27 05:12:17,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:12:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-10-27 05:12:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 261. [2020-10-27 05:12:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 05:12:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 372 transitions. [2020-10-27 05:12:17,560 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 372 transitions. Word has length 56 [2020-10-27 05:12:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:17,561 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 372 transitions. [2020-10-27 05:12:17,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 372 transitions. [2020-10-27 05:12:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:12:17,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:17,562 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] [2020-10-27 05:12:17,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:12:17,563 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash -529008445, now seen corresponding path program 1 times [2020-10-27 05:12:17,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:17,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71643766] [2020-10-27 05:12:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:17,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:18,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:18,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:12:18,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:12:18,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1167 [2020-10-27 05:12:18,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:18,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:18,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:18,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 05:12:18,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:18,938 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:18,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:18,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:18,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:18,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:18,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:18,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:12:18,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:18,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:18,981 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 05:12:18,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71643766] [2020-10-27 05:12:18,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:18,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:12:18,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708158759] [2020-10-27 05:12:18,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:18,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:18,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:18,984 INFO L87 Difference]: Start difference. First operand 261 states and 372 transitions. Second operand 6 states. [2020-10-27 05:12:19,183 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:12:19,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:19,609 INFO L93 Difference]: Finished difference Result 487 states and 708 transitions. [2020-10-27 05:12:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:12:19,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 05:12:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:19,612 INFO L225 Difference]: With dead ends: 487 [2020-10-27 05:12:19,612 INFO L226 Difference]: Without dead ends: 261 [2020-10-27 05:12:19,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-27 05:12:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-27 05:12:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 05:12:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 367 transitions. [2020-10-27 05:12:19,652 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 367 transitions. Word has length 57 [2020-10-27 05:12:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:19,654 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 367 transitions. [2020-10-27 05:12:19,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:12:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 367 transitions. [2020-10-27 05:12:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:12:19,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:19,661 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] [2020-10-27 05:12:19,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:12:19,661 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:19,661 INFO L82 PathProgramCache]: Analyzing trace with hash 630184006, now seen corresponding path program 1 times [2020-10-27 05:12:19,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:19,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424056884] [2020-10-27 05:12:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:19,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:22,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:12:22,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:12:22,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3085 [2020-10-27 05:12:22,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:12:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:12:22,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:23,150 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:23,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:23,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:23,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:23,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:23,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:12:23,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:23,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:23,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:23,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:23,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:12:23,245 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 05:12:23,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424056884] [2020-10-27 05:12:23,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:23,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:12:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946758887] [2020-10-27 05:12:23,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:12:23,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:12:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:12:23,251 INFO L87 Difference]: Start difference. First operand 261 states and 367 transitions. Second operand 12 states. [2020-10-27 05:12:23,548 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:12:24,491 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:12:24,666 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:12:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:25,301 INFO L93 Difference]: Finished difference Result 801 states and 1173 transitions. [2020-10-27 05:12:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:12:25,303 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-27 05:12:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:25,309 INFO L225 Difference]: With dead ends: 801 [2020-10-27 05:12:25,309 INFO L226 Difference]: Without dead ends: 628 [2020-10-27 05:12:25,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:12:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-10-27 05:12:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 274. [2020-10-27 05:12:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-27 05:12:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2020-10-27 05:12:25,358 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 58 [2020-10-27 05:12:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:25,358 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2020-10-27 05:12:25,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:12:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2020-10-27 05:12:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:12:25,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:25,361 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] [2020-10-27 05:12:25,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:12:25,362 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:25,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:25,363 INFO L82 PathProgramCache]: Analyzing trace with hash 346149565, now seen corresponding path program 1 times [2020-10-27 05:12:25,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:25,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065472181] [2020-10-27 05:12:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:25,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:30,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:30,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:30,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:12:30,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:12:30,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 05:12:30,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:12:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:12:30,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:31,005 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:31,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:31,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:31,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:31,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:31,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:31,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:12:31,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:31,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:31,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:31,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:31,088 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 05:12:31,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065472181] [2020-10-27 05:12:31,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:31,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:12:31,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678714876] [2020-10-27 05:12:31,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:12:31,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:12:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:12:31,092 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand 17 states. [2020-10-27 05:12:31,454 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:12:31,875 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 05:12:33,196 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:12:33,401 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:12:33,641 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:12:33,852 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:12:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:35,930 INFO L93 Difference]: Finished difference Result 1725 states and 2520 transitions. [2020-10-27 05:12:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 05:12:35,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-27 05:12:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:35,940 INFO L225 Difference]: With dead ends: 1725 [2020-10-27 05:12:35,940 INFO L226 Difference]: Without dead ends: 1558 [2020-10-27 05:12:35,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=517, Invalid=2033, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 05:12:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2020-10-27 05:12:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 275. [2020-10-27 05:12:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-27 05:12:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 383 transitions. [2020-10-27 05:12:36,008 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 383 transitions. Word has length 59 [2020-10-27 05:12:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:36,009 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 383 transitions. [2020-10-27 05:12:36,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:12:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 383 transitions. [2020-10-27 05:12:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:12:36,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:36,010 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] [2020-10-27 05:12:36,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:12:36,011 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2121156927, now seen corresponding path program 1 times [2020-10-27 05:12:36,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:36,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467667587] [2020-10-27 05:12:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:36,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:38,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:38,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:12:38,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:12:38,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2358 [2020-10-27 05:12:38,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:38,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:12:38,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:38,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:12:38,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:38,670 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:38,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:38,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:38,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:38,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:38,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:38,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:12:38,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:38,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:38,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:38,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:38,726 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 05:12:38,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467667587] [2020-10-27 05:12:38,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:38,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:12:38,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320646476] [2020-10-27 05:12:38,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:12:38,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:38,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:12:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:12:38,736 INFO L87 Difference]: Start difference. First operand 275 states and 383 transitions. Second operand 10 states. [2020-10-27 05:12:38,943 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:12:39,570 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:12:39,767 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:12:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:40,272 INFO L93 Difference]: Finished difference Result 634 states and 921 transitions. [2020-10-27 05:12:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:12:40,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-27 05:12:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:40,276 INFO L225 Difference]: With dead ends: 634 [2020-10-27 05:12:40,276 INFO L226 Difference]: Without dead ends: 446 [2020-10-27 05:12:40,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-10-27 05:12:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-27 05:12:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 261. [2020-10-27 05:12:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 05:12:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 366 transitions. [2020-10-27 05:12:40,324 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 366 transitions. Word has length 59 [2020-10-27 05:12:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:40,324 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 366 transitions. [2020-10-27 05:12:40,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:12:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 366 transitions. [2020-10-27 05:12:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:12:40,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:40,325 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] [2020-10-27 05:12:40,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:12:40,326 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash 571682027, now seen corresponding path program 1 times [2020-10-27 05:12:40,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:40,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693888881] [2020-10-27 05:12:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:40,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:43,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:12:43,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:12:43,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3020 [2020-10-27 05:12:43,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:43,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 05:12:43,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:43,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:12:43,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:43,869 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-27 05:12:44,394 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:44,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:44,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:44,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:44,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:12:44,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:44,447 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 05:12:44,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693888881] [2020-10-27 05:12:44,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:44,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-27 05:12:44,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527683137] [2020-10-27 05:12:44,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 05:12:44,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:44,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 05:12:44,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:12:44,450 INFO L87 Difference]: Start difference. First operand 261 states and 366 transitions. Second operand 18 states. [2020-10-27 05:12:44,653 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 05:12:45,290 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 191 [2020-10-27 05:12:45,816 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-27 05:12:46,083 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-27 05:12:46,498 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-10-27 05:12:47,536 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:12:47,773 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:12:48,085 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:12:48,343 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:12:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:50,274 INFO L93 Difference]: Finished difference Result 954 states and 1403 transitions. [2020-10-27 05:12:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:12:50,275 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-27 05:12:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:50,279 INFO L225 Difference]: With dead ends: 954 [2020-10-27 05:12:50,279 INFO L226 Difference]: Without dead ends: 781 [2020-10-27 05:12:50,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:12:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-10-27 05:12:50,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 266. [2020-10-27 05:12:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-27 05:12:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 369 transitions. [2020-10-27 05:12:50,338 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 369 transitions. Word has length 59 [2020-10-27 05:12:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:50,339 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 369 transitions. [2020-10-27 05:12:50,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 05:12:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 369 transitions. [2020-10-27 05:12:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:12:50,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:50,340 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] [2020-10-27 05:12:50,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:12:50,340 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:50,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:50,341 INFO L82 PathProgramCache]: Analyzing trace with hash 307595578, now seen corresponding path program 1 times [2020-10-27 05:12:50,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:50,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468707481] [2020-10-27 05:12:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:50,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:50,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:50,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:50,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:50,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:12:50,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:12:50,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-27 05:12:50,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:50,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:50,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:12:50,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:12:50,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:50,853 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:50,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:50,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:50,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:50,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:50,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:50,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:12:50,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:50,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:50,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:50,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:50,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:50,895 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 05:12:50,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468707481] [2020-10-27 05:12:50,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:50,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:12:50,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13832745] [2020-10-27 05:12:50,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:50,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:50,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:50,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:50,898 INFO L87 Difference]: Start difference. First operand 266 states and 369 transitions. Second operand 6 states. [2020-10-27 05:12:51,070 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:12:51,517 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:12:51,687 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:12:52,687 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:12:52,852 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:12:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:52,874 INFO L93 Difference]: Finished difference Result 1282 states and 1905 transitions. [2020-10-27 05:12:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:12:52,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-27 05:12:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:52,880 INFO L225 Difference]: With dead ends: 1282 [2020-10-27 05:12:52,880 INFO L226 Difference]: Without dead ends: 1123 [2020-10-27 05:12:52,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:12:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2020-10-27 05:12:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 443. [2020-10-27 05:12:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-10-27 05:12:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 627 transitions. [2020-10-27 05:12:52,987 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 627 transitions. Word has length 60 [2020-10-27 05:12:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:52,987 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 627 transitions. [2020-10-27 05:12:52,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:12:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 627 transitions. [2020-10-27 05:12:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:12:52,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:52,988 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] [2020-10-27 05:12:52,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:12:52,989 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2089004166, now seen corresponding path program 1 times [2020-10-27 05:12:52,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:52,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837070877] [2020-10-27 05:12:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:53,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:57,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:12:57,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:12:57,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4819 [2020-10-27 05:12:57,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:57,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 05:12:57,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:57,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:12:57,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:58,406 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-27 05:12:58,748 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:12:58,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:58,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:58,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:58,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:58,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:12:58,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:58,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:58,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:58,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:58,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:58,784 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 05:12:58,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837070877] [2020-10-27 05:12:58,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:58,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-27 05:12:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210321544] [2020-10-27 05:12:58,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 05:12:58,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:58,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 05:12:58,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:12:58,786 INFO L87 Difference]: Start difference. First operand 443 states and 627 transitions. Second operand 18 states. [2020-10-27 05:12:58,953 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-27 05:12:59,551 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 185 [2020-10-27 05:13:00,128 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-27 05:13:00,464 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-27 05:13:01,008 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2020-10-27 05:13:02,383 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:13:02,614 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:13:02,850 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:13:03,167 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:13:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:05,136 INFO L93 Difference]: Finished difference Result 2384 states and 3530 transitions. [2020-10-27 05:13:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:13:05,137 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-27 05:13:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:05,148 INFO L225 Difference]: With dead ends: 2384 [2020-10-27 05:13:05,148 INFO L226 Difference]: Without dead ends: 2061 [2020-10-27 05:13:05,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:13:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2020-10-27 05:13:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 443. [2020-10-27 05:13:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-10-27 05:13:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 625 transitions. [2020-10-27 05:13:05,267 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 625 transitions. Word has length 60 [2020-10-27 05:13:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:05,267 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 625 transitions. [2020-10-27 05:13:05,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 05:13:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 625 transitions. [2020-10-27 05:13:05,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:13:05,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:05,268 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] [2020-10-27 05:13:05,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:13:05,269 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:05,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:05,269 INFO L82 PathProgramCache]: Analyzing trace with hash 27311027, now seen corresponding path program 1 times [2020-10-27 05:13:05,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:05,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132820467] [2020-10-27 05:13:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:05,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:05,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:13:05,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:13:05,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-27 05:13:05,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:13:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:13:05,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:05,766 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:05,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:05,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:05,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:05,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:13:05,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:05,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:05,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:05,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:05,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:05,802 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 05:13:05,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132820467] [2020-10-27 05:13:05,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:05,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:13:05,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870646239] [2020-10-27 05:13:05,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:05,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:05,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:05,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:05,804 INFO L87 Difference]: Start difference. First operand 443 states and 625 transitions. Second operand 6 states. [2020-10-27 05:13:06,038 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:13:06,509 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:13:06,697 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:13:07,668 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:13:07,843 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:13:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:07,886 INFO L93 Difference]: Finished difference Result 1438 states and 2107 transitions. [2020-10-27 05:13:07,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:13:07,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-27 05:13:07,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:07,893 INFO L225 Difference]: With dead ends: 1438 [2020-10-27 05:13:07,893 INFO L226 Difference]: Without dead ends: 1121 [2020-10-27 05:13:07,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:13:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2020-10-27 05:13:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 449. [2020-10-27 05:13:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-27 05:13:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 626 transitions. [2020-10-27 05:13:08,023 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 626 transitions. Word has length 61 [2020-10-27 05:13:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:08,023 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 626 transitions. [2020-10-27 05:13:08,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 626 transitions. [2020-10-27 05:13:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:13:08,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:08,025 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] [2020-10-27 05:13:08,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:13:08,025 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:08,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1381659508, now seen corresponding path program 1 times [2020-10-27 05:13:08,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:08,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995342177] [2020-10-27 05:13:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:08,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:08,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:08,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:08,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:10,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:13:10,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:13:10,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2462 [2020-10-27 05:13:10,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:10,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:10,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:10,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:13:10,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:10,906 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:10,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:10,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:10,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:10,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:10,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:10,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:13:10,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:10,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:10,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:10,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:10,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:10,942 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 05:13:10,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995342177] [2020-10-27 05:13:10,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:10,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:10,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378360439] [2020-10-27 05:13:10,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:10,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:10,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:10,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:10,945 INFO L87 Difference]: Start difference. First operand 449 states and 626 transitions. Second operand 10 states. [2020-10-27 05:13:11,136 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:13:11,943 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:13:12,159 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:13:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:12,777 INFO L93 Difference]: Finished difference Result 946 states and 1361 transitions. [2020-10-27 05:13:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:13:12,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-27 05:13:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:12,782 INFO L225 Difference]: With dead ends: 946 [2020-10-27 05:13:12,783 INFO L226 Difference]: Without dead ends: 607 [2020-10-27 05:13:12,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:13:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2020-10-27 05:13:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 444. [2020-10-27 05:13:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-10-27 05:13:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 618 transitions. [2020-10-27 05:13:12,913 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 618 transitions. Word has length 61 [2020-10-27 05:13:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:12,913 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 618 transitions. [2020-10-27 05:13:12,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 618 transitions. [2020-10-27 05:13:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:13:12,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:12,914 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] [2020-10-27 05:13:12,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:13:12,915 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:12,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:12,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1396465864, now seen corresponding path program 1 times [2020-10-27 05:13:12,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:12,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142450251] [2020-10-27 05:13:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:12,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:14,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:13:14,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:13:14,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1633 [2020-10-27 05:13:14,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:14,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:14,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:14,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:13:14,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:14,767 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-27 05:13:14,960 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:14,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:14,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:14,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:14,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:14,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:13:14,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:14,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:14,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:14,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:14,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:14,995 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 05:13:14,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142450251] [2020-10-27 05:13:14,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:14,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:14,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209889492] [2020-10-27 05:13:14,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:14,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:14,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:14,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:14,997 INFO L87 Difference]: Start difference. First operand 444 states and 618 transitions. Second operand 10 states. [2020-10-27 05:13:15,191 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:13:16,028 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:13:16,227 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:13:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:16,838 INFO L93 Difference]: Finished difference Result 938 states and 1348 transitions. [2020-10-27 05:13:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:13:16,839 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-27 05:13:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:16,843 INFO L225 Difference]: With dead ends: 938 [2020-10-27 05:13:16,843 INFO L226 Difference]: Without dead ends: 603 [2020-10-27 05:13:16,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:13:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-27 05:13:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 440. [2020-10-27 05:13:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-10-27 05:13:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 608 transitions. [2020-10-27 05:13:16,963 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 608 transitions. Word has length 61 [2020-10-27 05:13:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:16,963 INFO L481 AbstractCegarLoop]: Abstraction has 440 states and 608 transitions. [2020-10-27 05:13:16,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 608 transitions. [2020-10-27 05:13:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:13:16,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:16,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:16,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:13:16,965 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash -569297781, now seen corresponding path program 1 times [2020-10-27 05:13:16,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:16,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914736230] [2020-10-27 05:13:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:17,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:18,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:18,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:13:18,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:13:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1591 [2020-10-27 05:13:18,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:13:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:18,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:13:18,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:18,960 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:18,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:18,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:18,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:18,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:18,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:18,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:13:18,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:18,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:18,984 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 05:13:18,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914736230] [2020-10-27 05:13:18,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:18,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:18,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741973358] [2020-10-27 05:13:18,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:13:18,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:18,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:13:18,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:18,986 INFO L87 Difference]: Start difference. First operand 440 states and 608 transitions. Second operand 9 states. [2020-10-27 05:13:19,260 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:13:20,297 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:13:20,481 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:13:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:20,510 INFO L93 Difference]: Finished difference Result 1092 states and 1570 transitions. [2020-10-27 05:13:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:13:20,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-27 05:13:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:20,514 INFO L225 Difference]: With dead ends: 1092 [2020-10-27 05:13:20,514 INFO L226 Difference]: Without dead ends: 748 [2020-10-27 05:13:20,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:13:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-27 05:13:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 415. [2020-10-27 05:13:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-10-27 05:13:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 576 transitions. [2020-10-27 05:13:20,664 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 576 transitions. Word has length 61 [2020-10-27 05:13:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:20,665 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 576 transitions. [2020-10-27 05:13:20,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:13:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 576 transitions. [2020-10-27 05:13:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:13:20,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:20,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:20,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:13:20,666 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:20,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1455163128, now seen corresponding path program 1 times [2020-10-27 05:13:20,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:20,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324817139] [2020-10-27 05:13:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:20,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:25,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:13:25,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:13:25,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:13:25,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:25,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:13:25,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:25,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:13:25,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:26,029 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:26,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:26,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:26,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:26,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:26,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:26,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:13:26,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:26,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:26,076 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 05:13:26,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324817139] [2020-10-27 05:13:26,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:26,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:13:26,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037173849] [2020-10-27 05:13:26,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:13:26,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:26,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:13:26,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:13:26,079 INFO L87 Difference]: Start difference. First operand 415 states and 576 transitions. Second operand 12 states. [2020-10-27 05:13:26,358 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:13:28,762 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:13:28,974 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:13:29,183 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:13:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:30,180 INFO L93 Difference]: Finished difference Result 2604 states and 3767 transitions. [2020-10-27 05:13:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:13:30,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-10-27 05:13:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:30,189 INFO L225 Difference]: With dead ends: 2604 [2020-10-27 05:13:30,189 INFO L226 Difference]: Without dead ends: 2289 [2020-10-27 05:13:30,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=327, Invalid=1233, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 05:13:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-10-27 05:13:30,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 439. [2020-10-27 05:13:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-10-27 05:13:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 612 transitions. [2020-10-27 05:13:30,349 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 612 transitions. Word has length 82 [2020-10-27 05:13:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:30,350 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 612 transitions. [2020-10-27 05:13:30,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:13:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 612 transitions. [2020-10-27 05:13:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:13:30,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:30,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:30,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:13:30,352 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:30,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:30,352 INFO L82 PathProgramCache]: Analyzing trace with hash -442273986, now seen corresponding path program 1 times [2020-10-27 05:13:30,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:30,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842670535] [2020-10-27 05:13:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:30,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:30,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:30,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:30,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:30,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:30,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:30,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:35,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:13:35,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:13:35,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:13:35,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:35,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:13:35,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:35,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:13:35,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:35,681 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:35,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:35,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:35,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:35,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:35,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:13:35,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:35,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:35,730 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 05:13:35,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842670535] [2020-10-27 05:13:35,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:35,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:13:35,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729571987] [2020-10-27 05:13:35,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:13:35,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:35,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:13:35,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:13:35,732 INFO L87 Difference]: Start difference. First operand 439 states and 612 transitions. Second operand 8 states. [2020-10-27 05:13:35,930 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:13:36,764 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:13:36,973 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:13:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:37,512 INFO L93 Difference]: Finished difference Result 1855 states and 2698 transitions. [2020-10-27 05:13:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:13:37,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-10-27 05:13:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:37,518 INFO L225 Difference]: With dead ends: 1855 [2020-10-27 05:13:37,518 INFO L226 Difference]: Without dead ends: 1540 [2020-10-27 05:13:37,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:13:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2020-10-27 05:13:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 791. [2020-10-27 05:13:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2020-10-27 05:13:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1128 transitions. [2020-10-27 05:13:37,822 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1128 transitions. Word has length 82 [2020-10-27 05:13:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:37,822 INFO L481 AbstractCegarLoop]: Abstraction has 791 states and 1128 transitions. [2020-10-27 05:13:37,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:13:37,822 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1128 transitions. [2020-10-27 05:13:37,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:13:37,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:37,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:37,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:13:37,824 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash 827080452, now seen corresponding path program 1 times [2020-10-27 05:13:37,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:37,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945415430] [2020-10-27 05:13:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:37,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:37,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:37,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:41,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:13:41,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:13:41,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3485 [2020-10-27 05:13:41,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:13:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:13:41,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:41,512 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:41,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:41,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:41,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:41,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:41,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:41,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:41,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:41,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:41,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:41,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:41,542 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 05:13:41,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945415430] [2020-10-27 05:13:41,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:41,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:13:41,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137935826] [2020-10-27 05:13:41,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:41,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:41,544 INFO L87 Difference]: Start difference. First operand 791 states and 1128 transitions. Second operand 6 states. [2020-10-27 05:13:41,743 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:13:42,663 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:13:42,834 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:13:43,020 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:13:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:43,443 INFO L93 Difference]: Finished difference Result 3398 states and 4970 transitions. [2020-10-27 05:13:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:13:43,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-27 05:13:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:43,458 INFO L225 Difference]: With dead ends: 3398 [2020-10-27 05:13:43,458 INFO L226 Difference]: Without dead ends: 2731 [2020-10-27 05:13:43,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:13:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2020-10-27 05:13:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1755. [2020-10-27 05:13:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1755 states. [2020-10-27 05:13:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2536 transitions. [2020-10-27 05:13:44,246 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2536 transitions. Word has length 82 [2020-10-27 05:13:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:44,247 INFO L481 AbstractCegarLoop]: Abstraction has 1755 states and 2536 transitions. [2020-10-27 05:13:44,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2536 transitions. [2020-10-27 05:13:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:13:44,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:44,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:44,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:13:44,249 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:44,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1648468494, now seen corresponding path program 1 times [2020-10-27 05:13:44,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:44,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796121240] [2020-10-27 05:13:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:46,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:13:46,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:13:46,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1865 [2020-10-27 05:13:46,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:46,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:46,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:13:46,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:13:46,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:46,359 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:46,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:46,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:46,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:46,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:46,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:13:46,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:46,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:46,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:46,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:46,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:46,395 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 05:13:46,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796121240] [2020-10-27 05:13:46,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:46,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:13:46,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090787022] [2020-10-27 05:13:46,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:46,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:46,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:46,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:46,397 INFO L87 Difference]: Start difference. First operand 1755 states and 2536 transitions. Second operand 6 states. [2020-10-27 05:13:46,572 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:13:47,306 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:13:47,522 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:13:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:48,736 INFO L93 Difference]: Finished difference Result 5490 states and 7964 transitions. [2020-10-27 05:13:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:13:48,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-27 05:13:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:48,751 INFO L225 Difference]: With dead ends: 5490 [2020-10-27 05:13:48,751 INFO L226 Difference]: Without dead ends: 3859 [2020-10-27 05:13:48,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2020-10-27 05:13:50,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 3853. [2020-10-27 05:13:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3853 states. [2020-10-27 05:13:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 5494 transitions. [2020-10-27 05:13:50,085 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 5494 transitions. Word has length 82 [2020-10-27 05:13:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:50,086 INFO L481 AbstractCegarLoop]: Abstraction has 3853 states and 5494 transitions. [2020-10-27 05:13:50,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 5494 transitions. [2020-10-27 05:13:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:13:50,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:50,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:50,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:13:50,088 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash -142088564, now seen corresponding path program 1 times [2020-10-27 05:13:50,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:50,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980389897] [2020-10-27 05:13:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:50,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:50,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:13:50,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:13:50,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-27 05:13:50,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:50,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:50,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 05:13:50,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 05:13:50,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:51,127 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:51,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:51,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:51,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:51,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:51,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:51,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:51,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:51,152 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 05:13:51,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980389897] [2020-10-27 05:13:51,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:51,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:13:51,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436327409] [2020-10-27 05:13:51,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:13:51,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:13:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:13:51,154 INFO L87 Difference]: Start difference. First operand 3853 states and 5494 transitions. Second operand 4 states. [2020-10-27 05:13:51,357 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:13:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:53,165 INFO L93 Difference]: Finished difference Result 6267 states and 8924 transitions. [2020-10-27 05:13:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:13:53,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-27 05:13:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:53,182 INFO L225 Difference]: With dead ends: 6267 [2020-10-27 05:13:53,182 INFO L226 Difference]: Without dead ends: 3688 [2020-10-27 05:13:53,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:13:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3688 states. [2020-10-27 05:13:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3688 to 3685. [2020-10-27 05:13:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3685 states. [2020-10-27 05:13:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3685 states to 3685 states and 5190 transitions. [2020-10-27 05:13:54,532 INFO L78 Accepts]: Start accepts. Automaton has 3685 states and 5190 transitions. Word has length 83 [2020-10-27 05:13:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:54,532 INFO L481 AbstractCegarLoop]: Abstraction has 3685 states and 5190 transitions. [2020-10-27 05:13:54,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:13:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3685 states and 5190 transitions. [2020-10-27 05:13:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:13:54,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:54,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:54,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:13:54,533 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash 829887108, now seen corresponding path program 1 times [2020-10-27 05:13:54,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:54,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071361381] [2020-10-27 05:13:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:54,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:59,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:59,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:13:59,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:13:59,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:13:59,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:59,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:13:59,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:59,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:13:59,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,879 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:13:59,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:59,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:59,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:59,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:59,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:13:59,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:59,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,921 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 05:13:59,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071361381] [2020-10-27 05:13:59,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:59,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:59,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965204402] [2020-10-27 05:13:59,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:13:59,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:59,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:13:59,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:13:59,923 INFO L87 Difference]: Start difference. First operand 3685 states and 5190 transitions. Second operand 11 states. [2020-10-27 05:14:00,180 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:14:01,122 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:14:01,299 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:14:02,160 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:14:02,346 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:14:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:04,126 INFO L93 Difference]: Finished difference Result 10119 states and 14279 transitions. [2020-10-27 05:14:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:14:04,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-10-27 05:14:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:04,147 INFO L225 Difference]: With dead ends: 10119 [2020-10-27 05:14:04,147 INFO L226 Difference]: Without dead ends: 6560 [2020-10-27 05:14:04,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:14:04,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6560 states. [2020-10-27 05:14:05,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6560 to 3293. [2020-10-27 05:14:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3293 states. [2020-10-27 05:14:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4627 transitions. [2020-10-27 05:14:05,337 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4627 transitions. Word has length 84 [2020-10-27 05:14:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:05,338 INFO L481 AbstractCegarLoop]: Abstraction has 3293 states and 4627 transitions. [2020-10-27 05:14:05,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:14:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4627 transitions. [2020-10-27 05:14:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:14:05,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:05,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:05,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:14:05,339 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash 957972415, now seen corresponding path program 1 times [2020-10-27 05:14:05,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:05,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95307553] [2020-10-27 05:14:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:05,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:05,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:14:05,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:14:05,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-27 05:14:05,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:05,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:05,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 05:14:05,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 05:14:05,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:06,128 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:14:06,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:06,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:06,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:06,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:06,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:14:06,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:06,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:06,164 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 05:14:06,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95307553] [2020-10-27 05:14:06,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:06,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:14:06,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111219255] [2020-10-27 05:14:06,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:14:06,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:06,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:14:06,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:14:06,166 INFO L87 Difference]: Start difference. First operand 3293 states and 4627 transitions. Second operand 4 states. [2020-10-27 05:14:06,358 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:14:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:08,945 INFO L93 Difference]: Finished difference Result 9281 states and 12999 transitions. [2020-10-27 05:14:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:14:08,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-27 05:14:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:08,959 INFO L225 Difference]: With dead ends: 9281 [2020-10-27 05:14:08,959 INFO L226 Difference]: Without dead ends: 6085 [2020-10-27 05:14:08,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:14:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2020-10-27 05:14:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5557. [2020-10-27 05:14:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5557 states. [2020-10-27 05:14:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5557 states to 5557 states and 7707 transitions. [2020-10-27 05:14:10,847 INFO L78 Accepts]: Start accepts. Automaton has 5557 states and 7707 transitions. Word has length 84 [2020-10-27 05:14:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:10,847 INFO L481 AbstractCegarLoop]: Abstraction has 5557 states and 7707 transitions. [2020-10-27 05:14:10,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:14:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5557 states and 7707 transitions. [2020-10-27 05:14:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:14:10,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:10,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:10,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:14:10,848 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:10,848 INFO L82 PathProgramCache]: Analyzing trace with hash -954303037, now seen corresponding path program 1 times [2020-10-27 05:14:10,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:10,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578575457] [2020-10-27 05:14:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:10,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:11,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:11,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:14:11,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:14:11,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 05:14:11,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:11,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:11,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-27 05:14:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 05:14:11,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:11,474 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:14:11,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:11,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:11,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:11,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:11,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:11,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:14:11,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:11,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:11,511 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 05:14:11,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578575457] [2020-10-27 05:14:11,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:11,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:14:11,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765204382] [2020-10-27 05:14:11,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:14:11,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:11,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:14:11,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:14:11,517 INFO L87 Difference]: Start difference. First operand 5557 states and 7707 transitions. Second operand 4 states. [2020-10-27 05:14:11,697 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:14:15,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:15,683 INFO L93 Difference]: Finished difference Result 15777 states and 21677 transitions. [2020-10-27 05:14:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:14:15,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-27 05:14:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:15,709 INFO L225 Difference]: With dead ends: 15777 [2020-10-27 05:14:15,709 INFO L226 Difference]: Without dead ends: 10307 [2020-10-27 05:14:15,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:14:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10307 states. [2020-10-27 05:14:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10307 to 9584. [2020-10-27 05:14:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9584 states. [2020-10-27 05:14:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9584 states to 9584 states and 12980 transitions. [2020-10-27 05:14:19,282 INFO L78 Accepts]: Start accepts. Automaton has 9584 states and 12980 transitions. Word has length 85 [2020-10-27 05:14:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:19,282 INFO L481 AbstractCegarLoop]: Abstraction has 9584 states and 12980 transitions. [2020-10-27 05:14:19,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:14:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9584 states and 12980 transitions. [2020-10-27 05:14:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:14:19,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:19,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:19,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:14:19,283 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash 414944394, now seen corresponding path program 1 times [2020-10-27 05:14:19,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:19,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764982160] [2020-10-27 05:14:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:19,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:19,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:19,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:14:19,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:19,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-27 05:14:19,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:19,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:19,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 05:14:19,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 05:14:19,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:19,686 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:14:19,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:19,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:19,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:19,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:19,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:14:19,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:19,712 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 05:14:19,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764982160] [2020-10-27 05:14:19,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:19,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:19,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908703870] [2020-10-27 05:14:19,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:19,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:19,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:19,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:19,714 INFO L87 Difference]: Start difference. First operand 9584 states and 12980 transitions. Second operand 6 states. [2020-10-27 05:14:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:25,810 INFO L93 Difference]: Finished difference Result 14884 states and 19957 transitions. [2020-10-27 05:14:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:14:25,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-27 05:14:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:25,843 INFO L225 Difference]: With dead ends: 14884 [2020-10-27 05:14:25,843 INFO L226 Difference]: Without dead ends: 14881 [2020-10-27 05:14:25,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14881 states. [2020-10-27 05:14:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14881 to 9968. [2020-10-27 05:14:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9968 states. [2020-10-27 05:14:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9968 states to 9968 states and 13284 transitions. [2020-10-27 05:14:29,862 INFO L78 Accepts]: Start accepts. Automaton has 9968 states and 13284 transitions. Word has length 86 [2020-10-27 05:14:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:29,863 INFO L481 AbstractCegarLoop]: Abstraction has 9968 states and 13284 transitions. [2020-10-27 05:14:29,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 9968 states and 13284 transitions. [2020-10-27 05:14:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 05:14:29,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:29,866 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:14:29,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 05:14:29,866 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1976004517, now seen corresponding path program 1 times [2020-10-27 05:14:29,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:29,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337263174] [2020-10-27 05:14:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:29,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:29,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:33,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:33,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:34,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:34,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 05:14:34,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:14:34,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:14:34,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:34,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 05:14:34,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:34,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 05:14:34,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:35,622 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:14:35,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:35,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:35,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:35,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:35,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:14:35,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:35,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:35,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337263174] [2020-10-27 05:14:35,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:14:35,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 05:14:35,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253024533] [2020-10-27 05:14:35,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 05:14:35,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 05:14:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:14:35,685 INFO L87 Difference]: Start difference. First operand 9968 states and 13284 transitions. Second operand 20 states. [2020-10-27 05:14:36,373 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 170 [2020-10-27 05:14:48,018 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-27 05:14:50,104 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:14:50,405 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:14:50,763 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:14:51,108 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:14:51,492 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:14:51,719 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:14:52,027 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:14:52,387 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:14:53,267 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:14:53,551 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:14:53,850 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 05:14:54,824 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 151