/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:26:18,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:26:18,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:26:18,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:26:18,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:26:18,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:26:18,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:26:18,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:26:18,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:26:18,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:26:18,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:26:18,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:26:18,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:26:18,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:26:18,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:26:18,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:26:18,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:26:18,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:26:18,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:26:18,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:26:18,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:26:18,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:26:18,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:26:18,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:26:19,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:26:19,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:26:19,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:26:19,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:26:19,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:26:19,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:26:19,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:26:19,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:26:19,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:26:19,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:26:19,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:26:19,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:26:19,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:26:19,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:26:19,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:26:19,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:26:19,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:26:19,019 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 23:26:19,046 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:26:19,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:26:19,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:26:19,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:26:19,049 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:26:19,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:26:19,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:26:19,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:26:19,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:26:19,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:26:19,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:26:19,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:26:19,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:26:19,050 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:26:19,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:26:19,051 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:26:19,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:26:19,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:26:19,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:26:19,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:26:19,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:26:19,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:26:19,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:26:19,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:26:19,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:26:19,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:26:19,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:26:19,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:26:19,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:26:19,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:26:19,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:26:19,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:26:19,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:26:19,508 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:26:19,509 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:26:19,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 23:26:19,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9752a267/e2b9ec3dade84f9a8927352582f14836/FLAGd3a6b0c73 [2020-10-27 23:26:20,292 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:26:20,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 23:26:20,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9752a267/e2b9ec3dade84f9a8927352582f14836/FLAGd3a6b0c73 [2020-10-27 23:26:20,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9752a267/e2b9ec3dade84f9a8927352582f14836 [2020-10-27 23:26:20,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:26:20,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:26:20,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:26:20,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:26:20,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:26:20,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:26:20" (1/1) ... [2020-10-27 23:26:20,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df1b7d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:20, skipping insertion in model container [2020-10-27 23:26:20,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:26:20" (1/1) ... [2020-10-27 23:26:20,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:26:20,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:26:21,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:26:21,315 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:26:21,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:26:21,549 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:26:21,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21 WrapperNode [2020-10-27 23:26:21,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:26:21,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:26:21,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:26:21,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:26:21,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21" (1/1) ... [2020-10-27 23:26:21,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21" (1/1) ... [2020-10-27 23:26:21,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21" (1/1) ... [2020-10-27 23:26:21,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21" (1/1) ... [2020-10-27 23:26:21,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21" (1/1) ... [2020-10-27 23:26:21,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21" (1/1) ... [2020-10-27 23:26:21,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21" (1/1) ... [2020-10-27 23:26:21,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:26:21,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:26:21,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:26:21,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:26:21,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21" (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 23:26:21,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:26:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:26:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:26:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:26:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:26:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:26:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:26:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:26:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:26:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:26:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:26:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:26:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:26:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:26:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:26:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:26:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:26:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:26:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:26:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:26:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:26:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:26:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:26:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:26:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:26:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:26:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:26:23,917 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:26:23,917 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:26:23,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:26:23 BoogieIcfgContainer [2020-10-27 23:26:23,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:26:23,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:26:23,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:26:23,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:26:23,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:26:20" (1/3) ... [2020-10-27 23:26:23,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744c56be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:26:23, skipping insertion in model container [2020-10-27 23:26:23,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:21" (2/3) ... [2020-10-27 23:26:23,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744c56be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:26:23, skipping insertion in model container [2020-10-27 23:26:23,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:26:23" (3/3) ... [2020-10-27 23:26:23,931 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 23:26:23,946 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:26:23,953 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:26:23,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:26:24,004 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:26:24,005 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:26:24,005 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:26:24,005 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:26:24,005 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:26:24,005 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:26:24,006 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:26:24,006 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:26:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states. [2020-10-27 23:26:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 23:26:24,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:24,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:24,056 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:24,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1514705107, now seen corresponding path program 1 times [2020-10-27 23:26:24,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:24,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312739223] [2020-10-27 23:26:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:24,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:26,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:29,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:29,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 23:26:29,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:26:29,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-27 23:26:29,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:29,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:26:29,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 23:26:29,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 23:26:29,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 23:26:30,354 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:26:30,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:30,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:30,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:30,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:30,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:30,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 23:26:30,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:30,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:30,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:30,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:30,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:26:30,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312739223] [2020-10-27 23:26:30,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:30,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:26:30,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70859269] [2020-10-27 23:26:30,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:26:30,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:30,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:26:30,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:26:30,572 INFO L87 Difference]: Start difference. First operand 386 states. Second operand 4 states. [2020-10-27 23:26:31,170 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 23:26:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:34,015 INFO L93 Difference]: Finished difference Result 694 states and 1234 transitions. [2020-10-27 23:26:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:26:34,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-10-27 23:26:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:34,038 INFO L225 Difference]: With dead ends: 694 [2020-10-27 23:26:34,038 INFO L226 Difference]: Without dead ends: 540 [2020-10-27 23:26:34,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-10-27 23:26:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 537. [2020-10-27 23:26:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-27 23:26:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 790 transitions. [2020-10-27 23:26:34,171 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 790 transitions. Word has length 144 [2020-10-27 23:26:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:34,176 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 790 transitions. [2020-10-27 23:26:34,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:26:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 790 transitions. [2020-10-27 23:26:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 23:26:34,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:34,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:34,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:26:34,192 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:34,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:34,193 INFO L82 PathProgramCache]: Analyzing trace with hash 879348149, now seen corresponding path program 1 times [2020-10-27 23:26:34,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:34,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797570407] [2020-10-27 23:26:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:34,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:34,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:34,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:34,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:34,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:34,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:35,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:35,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:37,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:39,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:39,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 23:26:39,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:26:39,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:26:39,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:39,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:26:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 23:26:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 23:26:39,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:39,739 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:26:39,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:39,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:39,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:39,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:39,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:39,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 23:26:39,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:39,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:39,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:39,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:39,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:39,860 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 23:26:39,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797570407] [2020-10-27 23:26:39,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:39,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:26:39,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575697024] [2020-10-27 23:26:39,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:26:39,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:39,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:26:39,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:26:39,877 INFO L87 Difference]: Start difference. First operand 537 states and 790 transitions. Second operand 4 states. [2020-10-27 23:26:40,340 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 23:26:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:42,652 INFO L93 Difference]: Finished difference Result 1073 states and 1629 transitions. [2020-10-27 23:26:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:26:42,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-10-27 23:26:42,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:42,663 INFO L225 Difference]: With dead ends: 1073 [2020-10-27 23:26:42,663 INFO L226 Difference]: Without dead ends: 882 [2020-10-27 23:26:42,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2020-10-27 23:26:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 879. [2020-10-27 23:26:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-10-27 23:26:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1314 transitions. [2020-10-27 23:26:42,713 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1314 transitions. Word has length 144 [2020-10-27 23:26:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:42,714 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1314 transitions. [2020-10-27 23:26:42,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:26:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1314 transitions. [2020-10-27 23:26:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 23:26:42,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:42,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:42,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:26:42,718 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash 868851084, now seen corresponding path program 1 times [2020-10-27 23:26:42,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:42,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119521732] [2020-10-27 23:26:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:42,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:44,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:44,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:44,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:45,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:47,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:47,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 23:26:47,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:26:47,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:26:47,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:47,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:26:47,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:26:47,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 23:26:47,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:48,349 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:26:48,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:48,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:48,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:48,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:48,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:26:48,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:48,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:48,459 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 23:26:48,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119521732] [2020-10-27 23:26:48,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:48,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:26:48,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041606734] [2020-10-27 23:26:48,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:26:48,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:26:48,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:48,462 INFO L87 Difference]: Start difference. First operand 879 states and 1314 transitions. Second operand 5 states. [2020-10-27 23:26:51,168 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:26:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:52,470 INFO L93 Difference]: Finished difference Result 2554 states and 3810 transitions. [2020-10-27 23:26:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:26:52,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-10-27 23:26:52,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:52,483 INFO L225 Difference]: With dead ends: 2554 [2020-10-27 23:26:52,484 INFO L226 Difference]: Without dead ends: 1700 [2020-10-27 23:26:52,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:26:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2020-10-27 23:26:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1667. [2020-10-27 23:26:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1667 states. [2020-10-27 23:26:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2474 transitions. [2020-10-27 23:26:52,589 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2474 transitions. Word has length 144 [2020-10-27 23:26:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:52,589 INFO L481 AbstractCegarLoop]: Abstraction has 1667 states and 2474 transitions. [2020-10-27 23:26:52,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:26:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2474 transitions. [2020-10-27 23:26:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 23:26:52,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:52,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:52,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:26:52,596 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:52,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1539528938, now seen corresponding path program 1 times [2020-10-27 23:26:52,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:52,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216801647] [2020-10-27 23:26:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:52,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:52,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:52,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:52,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:52,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:53,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:53,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:53,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:53,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:53,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:55,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:55,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:55,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:57,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:57,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 23:26:57,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:26:57,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:26:57,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:57,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:26:57,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:26:57,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 23:26:57,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:26:58,201 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:26:58,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:58,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:58,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:58,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:58,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:26:58,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:58,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:58,275 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 23:26:58,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216801647] [2020-10-27 23:26:58,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:58,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:26:58,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231322201] [2020-10-27 23:26:58,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:26:58,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:58,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:26:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:58,278 INFO L87 Difference]: Start difference. First operand 1667 states and 2474 transitions. Second operand 5 states. [2020-10-27 23:27:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:00,248 INFO L93 Difference]: Finished difference Result 3224 states and 4795 transitions. [2020-10-27 23:27:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:00,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-10-27 23:27:00,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:00,258 INFO L225 Difference]: With dead ends: 3224 [2020-10-27 23:27:00,258 INFO L226 Difference]: Without dead ends: 1667 [2020-10-27 23:27:00,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:27:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2020-10-27 23:27:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1667. [2020-10-27 23:27:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1667 states. [2020-10-27 23:27:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2472 transitions. [2020-10-27 23:27:00,349 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2472 transitions. Word has length 145 [2020-10-27 23:27:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:00,350 INFO L481 AbstractCegarLoop]: Abstraction has 1667 states and 2472 transitions. [2020-10-27 23:27:00,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2472 transitions. [2020-10-27 23:27:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 23:27:00,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:00,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:00,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:27:00,355 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:00,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:00,355 INFO L82 PathProgramCache]: Analyzing trace with hash 316075459, now seen corresponding path program 1 times [2020-10-27 23:27:00,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:00,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572059458] [2020-10-27 23:27:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:00,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:00,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:00,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:00,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:00,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:00,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:00,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:01,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:01,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:01,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:01,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:04,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:05,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:05,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:05,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 23:27:05,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:27:05,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 23:27:05,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:27:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:27:05,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:05,858 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:27:05,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:05,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:05,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:05,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:05,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:05,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:27:05,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:05,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:05,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:05,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:05,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:05,935 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 23:27:05,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572059458] [2020-10-27 23:27:05,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:05,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:05,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824881181] [2020-10-27 23:27:05,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:05,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:05,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:05,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:05,938 INFO L87 Difference]: Start difference. First operand 1667 states and 2472 transitions. Second operand 4 states. [2020-10-27 23:27:08,640 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 23:27:09,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:09,915 INFO L93 Difference]: Finished difference Result 3958 states and 5893 transitions. [2020-10-27 23:27:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:09,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-10-27 23:27:09,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:09,930 INFO L225 Difference]: With dead ends: 3958 [2020-10-27 23:27:09,930 INFO L226 Difference]: Without dead ends: 2438 [2020-10-27 23:27:09,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2020-10-27 23:27:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2405. [2020-10-27 23:27:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2405 states. [2020-10-27 23:27:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 3534 transitions. [2020-10-27 23:27:10,059 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 3534 transitions. Word has length 146 [2020-10-27 23:27:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:10,059 INFO L481 AbstractCegarLoop]: Abstraction has 2405 states and 3534 transitions. [2020-10-27 23:27:10,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 3534 transitions. [2020-10-27 23:27:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-27 23:27:10,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:10,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:10,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:27:10,065 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1629858603, now seen corresponding path program 1 times [2020-10-27 23:27:10,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:10,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927033067] [2020-10-27 23:27:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:11,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:12,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:12,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:12,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:12,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:15,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 23:27:15,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:27:15,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:27:15,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:27:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 23:27:15,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:15,631 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:27:15,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:15,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:15,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:15,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:15,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:27:15,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:15,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:15,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:15,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:15,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:15,717 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 23:27:15,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927033067] [2020-10-27 23:27:15,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:15,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:15,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685740064] [2020-10-27 23:27:15,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:15,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:15,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:15,719 INFO L87 Difference]: Start difference. First operand 2405 states and 3534 transitions. Second operand 5 states. [2020-10-27 23:27:18,408 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:27:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:19,722 INFO L93 Difference]: Finished difference Result 4880 states and 7150 transitions. [2020-10-27 23:27:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:27:19,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-10-27 23:27:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:19,738 INFO L225 Difference]: With dead ends: 4880 [2020-10-27 23:27:19,738 INFO L226 Difference]: Without dead ends: 2503 [2020-10-27 23:27:19,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:27:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2020-10-27 23:27:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2468. [2020-10-27 23:27:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2468 states. [2020-10-27 23:27:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3615 transitions. [2020-10-27 23:27:19,882 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3615 transitions. Word has length 152 [2020-10-27 23:27:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:19,882 INFO L481 AbstractCegarLoop]: Abstraction has 2468 states and 3615 transitions. [2020-10-27 23:27:19,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3615 transitions. [2020-10-27 23:27:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 23:27:19,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:19,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:19,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:27:19,888 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:19,889 INFO L82 PathProgramCache]: Analyzing trace with hash 97509232, now seen corresponding path program 1 times [2020-10-27 23:27:19,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:19,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788645034] [2020-10-27 23:27:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:19,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:21,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:21,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:23,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:23,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:24,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 23:27:24,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:27:24,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:27:24,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 23:27:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:27:24,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:25,419 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:27:25,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:25,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:25,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:25,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:25,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:25,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:27:25,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:25,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:25,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:25,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:25,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:25,518 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 23:27:25,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788645034] [2020-10-27 23:27:25,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:25,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:25,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885299188] [2020-10-27 23:27:25,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:25,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:25,521 INFO L87 Difference]: Start difference. First operand 2468 states and 3615 transitions. Second operand 5 states. [2020-10-27 23:27:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:27,557 INFO L93 Difference]: Finished difference Result 4882 states and 7144 transitions. [2020-10-27 23:27:27,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:27,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-27 23:27:27,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:27,574 INFO L225 Difference]: With dead ends: 4882 [2020-10-27 23:27:27,574 INFO L226 Difference]: Without dead ends: 2452 [2020-10-27 23:27:27,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:27:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2020-10-27 23:27:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2452. [2020-10-27 23:27:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2020-10-27 23:27:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3586 transitions. [2020-10-27 23:27:27,711 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3586 transitions. Word has length 153 [2020-10-27 23:27:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:27,711 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 3586 transitions. [2020-10-27 23:27:27,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3586 transitions. [2020-10-27 23:27:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 23:27:27,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:27,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:27,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:27:27,717 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:27,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2034051865, now seen corresponding path program 1 times [2020-10-27 23:27:27,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:27,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019400425] [2020-10-27 23:27:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:27,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:27,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:29,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:29,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:30,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:30,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:30,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:31,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:31,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:32,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:32,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 23:27:32,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:27:32,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:27:32,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:32,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:32,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-27 23:27:32,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 23:27:32,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:33,169 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:27:33,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:33,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:33,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:33,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:27:33,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:33,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:33,212 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 23:27:33,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019400425] [2020-10-27 23:27:33,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:33,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:33,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195356260] [2020-10-27 23:27:33,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:33,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:33,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:33,214 INFO L87 Difference]: Start difference. First operand 2452 states and 3586 transitions. Second operand 4 states. [2020-10-27 23:27:35,296 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 23:27:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:36,544 INFO L93 Difference]: Finished difference Result 6588 states and 9753 transitions. [2020-10-27 23:27:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:36,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-10-27 23:27:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:36,566 INFO L225 Difference]: With dead ends: 6588 [2020-10-27 23:27:36,566 INFO L226 Difference]: Without dead ends: 4546 [2020-10-27 23:27:36,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2020-10-27 23:27:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4513. [2020-10-27 23:27:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4513 states. [2020-10-27 23:27:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 6616 transitions. [2020-10-27 23:27:36,794 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 6616 transitions. Word has length 154 [2020-10-27 23:27:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:36,795 INFO L481 AbstractCegarLoop]: Abstraction has 4513 states and 6616 transitions. [2020-10-27 23:27:36,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 6616 transitions. [2020-10-27 23:27:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 23:27:36,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:36,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:36,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:27:36,802 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:36,803 INFO L82 PathProgramCache]: Analyzing trace with hash 266111660, now seen corresponding path program 1 times [2020-10-27 23:27:36,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:36,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159393740] [2020-10-27 23:27:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:36,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:36,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:36,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:38,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:39,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:39,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:39,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:39,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:40,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:41,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:41,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 23:27:41,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:27:41,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:27:41,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:41,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:41,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:27:41,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 23:27:41,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:42,362 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:27:42,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:42,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:42,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:42,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:42,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:27:42,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:42,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:42,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:42,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:42,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:42,439 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 23:27:42,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159393740] [2020-10-27 23:27:42,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:42,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:42,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408701614] [2020-10-27 23:27:42,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:42,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:42,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:42,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:42,441 INFO L87 Difference]: Start difference. First operand 4513 states and 6616 transitions. Second operand 5 states. [2020-10-27 23:27:45,146 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:27:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:46,087 INFO L93 Difference]: Finished difference Result 11564 states and 16969 transitions. [2020-10-27 23:27:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:27:46,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-27 23:27:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:46,123 INFO L225 Difference]: With dead ends: 11564 [2020-10-27 23:27:46,123 INFO L226 Difference]: Without dead ends: 7373 [2020-10-27 23:27:46,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:27:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7373 states. [2020-10-27 23:27:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7373 to 7339. [2020-10-27 23:27:46,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7339 states. [2020-10-27 23:27:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7339 states to 7339 states and 10623 transitions. [2020-10-27 23:27:46,666 INFO L78 Accepts]: Start accepts. Automaton has 7339 states and 10623 transitions. Word has length 154 [2020-10-27 23:27:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:46,666 INFO L481 AbstractCegarLoop]: Abstraction has 7339 states and 10623 transitions. [2020-10-27 23:27:46,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 7339 states and 10623 transitions. [2020-10-27 23:27:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 23:27:46,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:46,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:46,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:27:46,677 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:46,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1209657427, now seen corresponding path program 1 times [2020-10-27 23:27:46,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:46,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553795340] [2020-10-27 23:27:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:46,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:46,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:46,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:46,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:46,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:46,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:46,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:47,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:47,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:49,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:49,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:51,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:51,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 23:27:51,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:27:51,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:27:51,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:27:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 23:27:51,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:52,166 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:27:52,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:52,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:52,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:52,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:52,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:52,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:27:52,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:52,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:52,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:52,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:52,227 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 23:27:52,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553795340] [2020-10-27 23:27:52,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:52,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:52,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313890871] [2020-10-27 23:27:52,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:52,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:52,229 INFO L87 Difference]: Start difference. First operand 7339 states and 10623 transitions. Second operand 4 states. [2020-10-27 23:27:55,198 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 23:27:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:56,527 INFO L93 Difference]: Finished difference Result 19754 states and 28572 transitions. [2020-10-27 23:27:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:56,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-10-27 23:27:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:56,572 INFO L225 Difference]: With dead ends: 19754 [2020-10-27 23:27:56,572 INFO L226 Difference]: Without dead ends: 12870 [2020-10-27 23:27:56,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12870 states. [2020-10-27 23:27:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12870 to 12837. [2020-10-27 23:27:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12837 states. [2020-10-27 23:27:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12837 states to 12837 states and 18305 transitions. [2020-10-27 23:27:57,470 INFO L78 Accepts]: Start accepts. Automaton has 12837 states and 18305 transitions. Word has length 156 [2020-10-27 23:27:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:57,471 INFO L481 AbstractCegarLoop]: Abstraction has 12837 states and 18305 transitions. [2020-10-27 23:27:57,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 12837 states and 18305 transitions. [2020-10-27 23:27:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 23:27:57,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:57,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:57,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:27:57,497 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:57,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2028968714, now seen corresponding path program 1 times [2020-10-27 23:27:57,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:57,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601933841] [2020-10-27 23:27:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:57,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:57,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:57,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:57,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:57,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:57,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:57,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:57,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:58,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:02,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:02,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:03,037 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:28:03,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:03,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:03,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:03,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:03,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:03,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:28:03,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:03,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:03,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:03,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601933841] [2020-10-27 23:28:03,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:03,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:28:03,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555066083] [2020-10-27 23:28:03,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:28:03,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:28:03,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:28:03,088 INFO L87 Difference]: Start difference. First operand 12837 states and 18305 transitions. Second operand 5 states. [2020-10-27 23:28:05,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:05,478 INFO L93 Difference]: Finished difference Result 23975 states and 34263 transitions. [2020-10-27 23:28:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:28:05,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-27 23:28:05,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:05,505 INFO L225 Difference]: With dead ends: 23975 [2020-10-27 23:28:05,505 INFO L226 Difference]: Without dead ends: 11429 [2020-10-27 23:28:05,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:28:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2020-10-27 23:28:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 11427. [2020-10-27 23:28:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11427 states. [2020-10-27 23:28:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11427 states to 11427 states and 16306 transitions. [2020-10-27 23:28:06,174 INFO L78 Accepts]: Start accepts. Automaton has 11427 states and 16306 transitions. Word has length 156 [2020-10-27 23:28:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:06,175 INFO L481 AbstractCegarLoop]: Abstraction has 11427 states and 16306 transitions. [2020-10-27 23:28:06,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:28:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 11427 states and 16306 transitions. [2020-10-27 23:28:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 23:28:06,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:06,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:28:06,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:28:06,192 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1886065082, now seen corresponding path program 1 times [2020-10-27 23:28:06,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:06,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769943676] [2020-10-27 23:28:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:06,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:06,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:06,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:06,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:06,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:06,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:06,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:06,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:07,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:08,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:08,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:08,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:11,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:11,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 23:28:11,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:28:11,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:28:11,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:11,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:28:11,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 23:28:11,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 23:28:11,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:11,852 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:28:11,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:11,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:11,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:11,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:11,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:11,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:28:11,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:11,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:11,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:11,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:11,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:11,906 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 23:28:11,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769943676] [2020-10-27 23:28:11,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:11,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:28:11,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795880136] [2020-10-27 23:28:11,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:28:11,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:11,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:28:11,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:28:11,908 INFO L87 Difference]: Start difference. First operand 11427 states and 16306 transitions. Second operand 12 states. [2020-10-27 23:28:12,438 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:28:18,064 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 23:28:19,300 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:28:19,822 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:28:20,790 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 230 [2020-10-27 23:28:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:25,797 INFO L93 Difference]: Finished difference Result 31600 states and 45842 transitions. [2020-10-27 23:28:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 23:28:25,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 162 [2020-10-27 23:28:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:25,855 INFO L225 Difference]: With dead ends: 31600 [2020-10-27 23:28:25,856 INFO L226 Difference]: Without dead ends: 23479 [2020-10-27 23:28:25,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=500, Invalid=1480, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 23:28:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23479 states. [2020-10-27 23:28:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23479 to 15173. [2020-10-27 23:28:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15173 states. [2020-10-27 23:28:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15173 states to 15173 states and 22066 transitions. [2020-10-27 23:28:27,082 INFO L78 Accepts]: Start accepts. Automaton has 15173 states and 22066 transitions. Word has length 162 [2020-10-27 23:28:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:27,082 INFO L481 AbstractCegarLoop]: Abstraction has 15173 states and 22066 transitions. [2020-10-27 23:28:27,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:28:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 15173 states and 22066 transitions. [2020-10-27 23:28:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 23:28:27,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:27,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:28:27,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:28:27,099 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:27,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1144382291, now seen corresponding path program 1 times [2020-10-27 23:28:27,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:27,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851619392] [2020-10-27 23:28:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:27,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:27,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:27,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:27,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:27,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:27,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:28,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:28,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:28,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:28,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:29,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:29,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:32,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:32,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 23:28:32,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:28:32,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 23:28:32,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:32,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:28:32,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:28:32,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 23:28:32,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:32,646 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:28:32,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:32,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:32,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:32,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:32,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:32,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:28:32,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:32,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:32,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:32,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:32,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:32,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851619392] [2020-10-27 23:28:32,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:32,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:28:32,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788241001] [2020-10-27 23:28:32,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:28:32,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:32,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:28:32,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:28:32,704 INFO L87 Difference]: Start difference. First operand 15173 states and 22066 transitions. Second operand 7 states. [2020-10-27 23:28:33,174 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-27 23:28:37,176 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 23:28:37,650 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:28:38,101 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-27 23:28:38,560 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:28:38,996 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 23:28:39,476 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:28:42,785 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:28:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:43,703 INFO L93 Difference]: Finished difference Result 50316 states and 75789 transitions. [2020-10-27 23:28:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 23:28:43,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2020-10-27 23:28:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:43,773 INFO L225 Difference]: With dead ends: 50316 [2020-10-27 23:28:43,773 INFO L226 Difference]: Without dead ends: 36932 [2020-10-27 23:28:43,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:28:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36932 states. [2020-10-27 23:28:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36932 to 33273. [2020-10-27 23:28:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33273 states. [2020-10-27 23:28:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33273 states to 33273 states and 49898 transitions. [2020-10-27 23:28:46,003 INFO L78 Accepts]: Start accepts. Automaton has 33273 states and 49898 transitions. Word has length 162 [2020-10-27 23:28:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:46,004 INFO L481 AbstractCegarLoop]: Abstraction has 33273 states and 49898 transitions. [2020-10-27 23:28:46,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:28:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 33273 states and 49898 transitions. [2020-10-27 23:28:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 23:28:46,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:46,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:28:46,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:28:46,024 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1081367494, now seen corresponding path program 1 times [2020-10-27 23:28:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:46,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570146930] [2020-10-27 23:28:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:46,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:46,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:46,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:46,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:46,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:46,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:46,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:47,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:47,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:47,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:51,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:51,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 23:28:51,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:28:51,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:28:51,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:51,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:28:51,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-27 23:28:51,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 23:28:51,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:51,889 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:28:51,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:51,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:51,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:51,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:51,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:28:51,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:51,975 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 23:28:51,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570146930] [2020-10-27 23:28:51,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:51,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:28:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522499255] [2020-10-27 23:28:51,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:28:51,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:51,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:28:51,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:28:51,977 INFO L87 Difference]: Start difference. First operand 33273 states and 49898 transitions. Second operand 12 states. [2020-10-27 23:28:53,164 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 253 DAG size of output: 247 [2020-10-27 23:28:59,204 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-27 23:29:01,383 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-27 23:29:03,729 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-27 23:29:16,264 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:29:18,909 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-27 23:29:26,722 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 233 [2020-10-27 23:29:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:29,179 INFO L93 Difference]: Finished difference Result 76211 states and 118437 transitions. [2020-10-27 23:29:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 23:29:29,180 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 162 [2020-10-27 23:29:29,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:29,278 INFO L225 Difference]: With dead ends: 76211 [2020-10-27 23:29:29,278 INFO L226 Difference]: Without dead ends: 59862 [2020-10-27 23:29:29,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=198, Invalid=855, Unknown=3, NotChecked=0, Total=1056 [2020-10-27 23:29:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59862 states. [2020-10-27 23:29:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59862 to 34540. [2020-10-27 23:29:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34540 states. [2020-10-27 23:29:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34540 states to 34540 states and 51406 transitions. [2020-10-27 23:29:32,442 INFO L78 Accepts]: Start accepts. Automaton has 34540 states and 51406 transitions. Word has length 162 [2020-10-27 23:29:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:32,442 INFO L481 AbstractCegarLoop]: Abstraction has 34540 states and 51406 transitions. [2020-10-27 23:29:32,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:29:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 34540 states and 51406 transitions. [2020-10-27 23:29:32,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 23:29:32,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:32,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:32,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:29:32,459 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:32,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:32,459 INFO L82 PathProgramCache]: Analyzing trace with hash -718327789, now seen corresponding path program 1 times [2020-10-27 23:29:32,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:32,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749609547] [2020-10-27 23:29:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:32,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:32,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:32,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:32,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:32,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:32,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:33,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:33,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:35,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:35,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:37,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:37,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 23:29:37,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:29:37,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:29:37,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:37,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:29:37,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:29:37,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 23:29:37,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:38,003 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:29:38,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:38,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:38,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:38,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:38,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:38,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:29:38,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:38,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:38,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:38,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:38,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:38,090 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 23:29:38,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749609547] [2020-10-27 23:29:38,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:38,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:29:38,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406755442] [2020-10-27 23:29:38,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:29:38,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:38,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:29:38,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:38,093 INFO L87 Difference]: Start difference. First operand 34540 states and 51406 transitions. Second operand 5 states. [2020-10-27 23:29:41,747 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:29:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:45,067 INFO L93 Difference]: Finished difference Result 69139 states and 102868 transitions. [2020-10-27 23:29:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:29:45,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-27 23:29:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:45,105 INFO L225 Difference]: With dead ends: 69139 [2020-10-27 23:29:45,105 INFO L226 Difference]: Without dead ends: 34770 [2020-10-27 23:29:45,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:29:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34770 states. [2020-10-27 23:29:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34770 to 34621. [2020-10-27 23:29:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34621 states. [2020-10-27 23:29:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34621 states to 34621 states and 51503 transitions. [2020-10-27 23:29:47,913 INFO L78 Accepts]: Start accepts. Automaton has 34621 states and 51503 transitions. Word has length 162 [2020-10-27 23:29:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:47,913 INFO L481 AbstractCegarLoop]: Abstraction has 34621 states and 51503 transitions. [2020-10-27 23:29:47,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:29:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 34621 states and 51503 transitions. [2020-10-27 23:29:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 23:29:47,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:47,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:47,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:29:47,930 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:47,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1044240550, now seen corresponding path program 1 times [2020-10-27 23:29:47,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:47,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605544196] [2020-10-27 23:29:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:47,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:47,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:52,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:52,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 23:29:52,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:29:52,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 23:29:52,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:52,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:29:52,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 23:29:52,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:29:52,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:53,456 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:29:53,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:53,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:53,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:53,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:53,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:53,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:29:53,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:53,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:53,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:53,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:53,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:53,512 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 23:29:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605544196] [2020-10-27 23:29:53,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:53,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:29:53,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182151051] [2020-10-27 23:29:53,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:29:53,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:53,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:29:53,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:53,514 INFO L87 Difference]: Start difference. First operand 34621 states and 51503 transitions. Second operand 5 states.