/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 04:56:58,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 04:56:58,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 04:56:58,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 04:56:58,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 04:56:58,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 04:56:58,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 04:56:58,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 04:56:58,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 04:56:58,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 04:56:58,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 04:56:58,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 04:56:58,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 04:56:58,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 04:56:58,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 04:56:58,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 04:56:58,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 04:56:58,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 04:56:58,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 04:56:58,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 04:56:58,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 04:56:58,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 04:56:58,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 04:56:58,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 04:56:58,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 04:56:58,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 04:56:58,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 04:56:58,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 04:56:58,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 04:56:58,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 04:56:58,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 04:56:58,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 04:56:58,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 04:56:58,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 04:56:58,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 04:56:58,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 04:56:58,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 04:56:58,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 04:56:58,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 04:56:58,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 04:56:58,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 04:56:58,631 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 04:56:58,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 04:56:58,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 04:56:58,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 04:56:58,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 04:56:58,682 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 04:56:58,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 04:56:58,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 04:56:58,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 04:56:58,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 04:56:58,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 04:56:58,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 04:56:58,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 04:56:58,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 04:56:58,685 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 04:56:58,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 04:56:58,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 04:56:58,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 04:56:58,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 04:56:58,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 04:56:58,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 04:56:58,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 04:56:58,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:56:58,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 04:56:58,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 04:56:58,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 04:56:58,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 04:56:58,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 04:56:58,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 04:56:58,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 04:56:58,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 04:56:59,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 04:56:59,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 04:56:59,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 04:56:59,160 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 04:56:59,160 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 04:56:59,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 04:56:59,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42a1f9825/1850576c093145419108a15542cf7824/FLAGc41134701 [2020-10-27 04:56:59,916 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 04:56:59,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 04:56:59,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42a1f9825/1850576c093145419108a15542cf7824/FLAGc41134701 [2020-10-27 04:57:00,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42a1f9825/1850576c093145419108a15542cf7824 [2020-10-27 04:57:00,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 04:57:00,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 04:57:00,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 04:57:00,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 04:57:00,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 04:57:00,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:57:00" (1/1) ... [2020-10-27 04:57:00,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d81f29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00, skipping insertion in model container [2020-10-27 04:57:00,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:57:00" (1/1) ... [2020-10-27 04:57:00,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 04:57:00,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 04:57:00,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:57:00,624 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 04:57:00,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:57:00,752 INFO L208 MainTranslator]: Completed translation [2020-10-27 04:57:00,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00 WrapperNode [2020-10-27 04:57:00,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 04:57:00,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 04:57:00,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 04:57:00,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 04:57:00,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00" (1/1) ... [2020-10-27 04:57:00,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00" (1/1) ... [2020-10-27 04:57:00,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00" (1/1) ... [2020-10-27 04:57:00,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00" (1/1) ... [2020-10-27 04:57:00,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00" (1/1) ... [2020-10-27 04:57:00,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00" (1/1) ... [2020-10-27 04:57:00,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00" (1/1) ... [2020-10-27 04:57:00,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 04:57:00,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 04:57:00,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 04:57:00,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 04:57:00,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00" (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 04:57:00,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 04:57:00,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 04:57:00,926 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 04:57:00,927 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 04:57:00,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 04:57:00,927 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 04:57:00,927 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 04:57:00,927 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 04:57:00,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 04:57:00,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 04:57:00,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 04:57:00,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 04:57:00,928 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 04:57:00,928 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 04:57:00,928 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 04:57:00,928 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 04:57:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 04:57:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 04:57:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 04:57:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 04:57:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 04:57:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 04:57:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 04:57:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 04:57:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 04:57:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 04:57:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 04:57:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 04:57:01,880 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 04:57:01,882 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 04:57:01,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:57:01 BoogieIcfgContainer [2020-10-27 04:57:01,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 04:57:01,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 04:57:01,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 04:57:01,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 04:57:01,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:57:00" (1/3) ... [2020-10-27 04:57:01,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2ab6b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:57:01, skipping insertion in model container [2020-10-27 04:57:01,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:57:00" (2/3) ... [2020-10-27 04:57:01,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2ab6b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:57:01, skipping insertion in model container [2020-10-27 04:57:01,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:57:01" (3/3) ... [2020-10-27 04:57:01,893 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 04:57:01,905 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 04:57:01,911 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 04:57:01,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 04:57:01,953 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 04:57:01,953 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 04:57:01,954 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 04:57:01,954 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 04:57:01,954 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 04:57:01,954 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 04:57:01,954 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 04:57:01,954 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 04:57:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-10-27 04:57:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 04:57:01,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:01,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:57:01,988 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1542310197, now seen corresponding path program 1 times [2020-10-27 04:57:02,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:02,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104865798] [2020-10-27 04:57:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:02,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:02,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:02,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:03,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:05,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:05,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 04:57:05,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:57:05,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3612 [2020-10-27 04:57:05,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:57:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 04:57:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 04:57:05,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 04:57:06,419 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:06,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:06,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:06,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:06,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:06,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:06,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 04:57:06,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:57:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:57:06,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:57:06,500 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 04:57:06,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104865798] [2020-10-27 04:57:06,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:06,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:57:06,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256519726] [2020-10-27 04:57:06,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:57:06,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:57:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:57:06,533 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 4 states. [2020-10-27 04:57:06,898 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:57:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:07,773 INFO L93 Difference]: Finished difference Result 316 states and 527 transitions. [2020-10-27 04:57:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:57:07,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-27 04:57:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:07,787 INFO L225 Difference]: With dead ends: 316 [2020-10-27 04:57:07,788 INFO L226 Difference]: Without dead ends: 217 [2020-10-27 04:57:07,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:57:07,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-27 04:57:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2020-10-27 04:57:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 04:57:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 332 transitions. [2020-10-27 04:57:07,878 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 332 transitions. Word has length 61 [2020-10-27 04:57:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:07,879 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 332 transitions. [2020-10-27 04:57:07,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:57:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 332 transitions. [2020-10-27 04:57:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 04:57:07,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:07,886 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] [2020-10-27 04:57:07,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 04:57:07,887 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1244460738, now seen corresponding path program 1 times [2020-10-27 04:57:07,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:07,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360476371] [2020-10-27 04:57:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:07,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:08,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:08,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:08,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:09,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:12,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:12,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 04:57:12,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:57:12,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4945 [2020-10-27 04:57:12,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:57:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:57:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 04:57:12,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:13,351 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:13,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:13,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:13,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:13,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:13,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:13,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 04:57:13,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:57:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:57:13,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:13,396 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 04:57:13,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360476371] [2020-10-27 04:57:13,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:13,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:57:13,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553734481] [2020-10-27 04:57:13,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:57:13,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:57:13,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:57:13,400 INFO L87 Difference]: Start difference. First operand 213 states and 332 transitions. Second operand 5 states. [2020-10-27 04:57:14,764 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:57:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:14,877 INFO L93 Difference]: Finished difference Result 590 states and 919 transitions. [2020-10-27 04:57:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:57:14,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-27 04:57:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:14,884 INFO L225 Difference]: With dead ends: 590 [2020-10-27 04:57:14,884 INFO L226 Difference]: Without dead ends: 406 [2020-10-27 04:57:14,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:57:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-27 04:57:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 403. [2020-10-27 04:57:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-27 04:57:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 627 transitions. [2020-10-27 04:57:14,939 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 627 transitions. Word has length 63 [2020-10-27 04:57:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:14,940 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 627 transitions. [2020-10-27 04:57:14,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:57:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 627 transitions. [2020-10-27 04:57:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 04:57:14,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:14,944 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] [2020-10-27 04:57:14,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 04:57:14,950 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:14,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1990915187, now seen corresponding path program 1 times [2020-10-27 04:57:14,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:14,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636383032] [2020-10-27 04:57:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:14,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:15,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:15,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:15,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:15,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:16,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:18,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:18,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 04:57:18,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:57:18,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3629 [2020-10-27 04:57:18,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:18,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:57:18,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:57:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 04:57:18,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 04:57:18,978 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:18,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:18,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:19,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:19,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:19,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:19,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 04:57:19,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:19,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:57:19,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:57:19,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:19,035 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 04:57:19,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636383032] [2020-10-27 04:57:19,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:19,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:57:19,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902108876] [2020-10-27 04:57:19,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:57:19,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:19,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:57:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:57:19,039 INFO L87 Difference]: Start difference. First operand 403 states and 627 transitions. Second operand 5 states. [2020-10-27 04:57:20,507 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:57:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:20,607 INFO L93 Difference]: Finished difference Result 1145 states and 1780 transitions. [2020-10-27 04:57:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:57:20,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-27 04:57:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:20,621 INFO L225 Difference]: With dead ends: 1145 [2020-10-27 04:57:20,621 INFO L226 Difference]: Without dead ends: 774 [2020-10-27 04:57:20,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:57:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-27 04:57:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 771. [2020-10-27 04:57:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-10-27 04:57:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1193 transitions. [2020-10-27 04:57:20,748 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1193 transitions. Word has length 64 [2020-10-27 04:57:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:20,751 INFO L481 AbstractCegarLoop]: Abstraction has 771 states and 1193 transitions. [2020-10-27 04:57:20,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:57:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1193 transitions. [2020-10-27 04:57:20,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 04:57:20,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:20,757 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] [2020-10-27 04:57:20,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 04:57:20,757 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:20,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1160266301, now seen corresponding path program 1 times [2020-10-27 04:57:20,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:20,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341723956] [2020-10-27 04:57:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:20,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:20,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:20,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:20,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:22,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:25,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:25,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 04:57:25,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:57:25,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4981 [2020-10-27 04:57:25,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:25,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:57:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 04:57:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 04:57:25,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 04:57:26,131 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:26,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:26,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:26,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:26,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:26,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:26,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 04:57:26,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:57:26,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:26,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:57:26,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:26,170 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 04:57:26,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341723956] [2020-10-27 04:57:26,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:26,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:57:26,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688088260] [2020-10-27 04:57:26,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:57:26,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:26,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:57:26,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:57:26,172 INFO L87 Difference]: Start difference. First operand 771 states and 1193 transitions. Second operand 5 states. [2020-10-27 04:57:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:26,977 INFO L93 Difference]: Finished difference Result 1350 states and 2085 transitions. [2020-10-27 04:57:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:57:26,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-27 04:57:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:26,981 INFO L225 Difference]: With dead ends: 1350 [2020-10-27 04:57:26,981 INFO L226 Difference]: Without dead ends: 591 [2020-10-27 04:57:26,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:57:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-27 04:57:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2020-10-27 04:57:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-10-27 04:57:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 907 transitions. [2020-10-27 04:57:27,067 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 907 transitions. Word has length 65 [2020-10-27 04:57:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:27,067 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 907 transitions. [2020-10-27 04:57:27,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:57:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 907 transitions. [2020-10-27 04:57:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 04:57:27,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:27,069 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] [2020-10-27 04:57:27,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 04:57:27,070 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:27,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:27,070 INFO L82 PathProgramCache]: Analyzing trace with hash 805641021, now seen corresponding path program 1 times [2020-10-27 04:57:27,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:27,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619125453] [2020-10-27 04:57:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:27,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:27,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:27,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:27,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:27,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:32,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:32,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 04:57:32,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:57:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 04:57:32,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:57:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:57:32,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 04:57:32,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:32,453 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:32,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:32,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:32,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:32,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:32,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 04:57:32,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:32,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:57:32,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:32,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:57:32,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:32,502 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 04:57:32,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619125453] [2020-10-27 04:57:32,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:32,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:57:32,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679239916] [2020-10-27 04:57:32,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:57:32,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:32,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:57:32,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:57:32,507 INFO L87 Difference]: Start difference. First operand 591 states and 907 transitions. Second operand 5 states. [2020-10-27 04:57:33,685 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:57:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:33,837 INFO L93 Difference]: Finished difference Result 1673 states and 2566 transitions. [2020-10-27 04:57:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:57:33,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-27 04:57:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:33,844 INFO L225 Difference]: With dead ends: 1673 [2020-10-27 04:57:33,845 INFO L226 Difference]: Without dead ends: 1123 [2020-10-27 04:57:33,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:57:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2020-10-27 04:57:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1120. [2020-10-27 04:57:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2020-10-27 04:57:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1706 transitions. [2020-10-27 04:57:33,943 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1706 transitions. Word has length 65 [2020-10-27 04:57:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:33,945 INFO L481 AbstractCegarLoop]: Abstraction has 1120 states and 1706 transitions. [2020-10-27 04:57:33,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:57:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1706 transitions. [2020-10-27 04:57:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 04:57:33,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:33,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:57:33,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 04:57:33,949 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:33,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2029074358, now seen corresponding path program 1 times [2020-10-27 04:57:33,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:33,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12023449] [2020-10-27 04:57:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:33,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:34,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:34,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:34,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:34,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:35,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:38,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:38,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 04:57:38,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 04:57:38,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 04:57:38,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:38,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:57:38,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:57:38,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 04:57:38,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:39,338 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:39,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:39,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:39,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:39,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:39,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:39,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 04:57:39,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:39,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:57:39,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:39,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:57:39,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:39,379 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 04:57:39,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12023449] [2020-10-27 04:57:39,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:39,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:57:39,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319516064] [2020-10-27 04:57:39,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:57:39,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:39,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:57:39,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:57:39,383 INFO L87 Difference]: Start difference. First operand 1120 states and 1706 transitions. Second operand 5 states. [2020-10-27 04:57:40,522 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:57:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:40,675 INFO L93 Difference]: Finished difference Result 2990 states and 4642 transitions. [2020-10-27 04:57:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:57:40,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 04:57:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:40,689 INFO L225 Difference]: With dead ends: 2990 [2020-10-27 04:57:40,689 INFO L226 Difference]: Without dead ends: 2142 [2020-10-27 04:57:40,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:57:40,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2020-10-27 04:57:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2139. [2020-10-27 04:57:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2139 states. [2020-10-27 04:57:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3243 transitions. [2020-10-27 04:57:40,891 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3243 transitions. Word has length 66 [2020-10-27 04:57:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:40,892 INFO L481 AbstractCegarLoop]: Abstraction has 2139 states and 3243 transitions. [2020-10-27 04:57:40,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:57:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3243 transitions. [2020-10-27 04:57:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 04:57:40,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:40,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:57:40,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 04:57:40,897 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1852280084, now seen corresponding path program 1 times [2020-10-27 04:57:40,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:40,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725798802] [2020-10-27 04:57:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:40,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:40,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:40,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:41,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:42,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:42,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:45,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:45,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:45,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 04:57:45,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 04:57:45,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 04:57:45,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:45,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:57:45,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:57:45,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 04:57:45,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:46,276 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:46,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:46,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:46,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:46,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:46,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:46,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 04:57:46,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:46,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:57:46,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:46,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:57:46,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:46,353 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 04:57:46,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725798802] [2020-10-27 04:57:46,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:46,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:57:46,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114915244] [2020-10-27 04:57:46,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:57:46,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:46,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:57:46,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:57:46,357 INFO L87 Difference]: Start difference. First operand 2139 states and 3243 transitions. Second operand 8 states. [2020-10-27 04:57:46,732 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:57:47,933 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 04:57:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:48,436 INFO L93 Difference]: Finished difference Result 5644 states and 8887 transitions. [2020-10-27 04:57:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:57:48,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-27 04:57:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:48,460 INFO L225 Difference]: With dead ends: 5644 [2020-10-27 04:57:48,460 INFO L226 Difference]: Without dead ends: 4005 [2020-10-27 04:57:48,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-27 04:57:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2020-10-27 04:57:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 2211. [2020-10-27 04:57:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2211 states. [2020-10-27 04:57:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3313 transitions. [2020-10-27 04:57:48,736 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3313 transitions. Word has length 67 [2020-10-27 04:57:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:48,736 INFO L481 AbstractCegarLoop]: Abstraction has 2211 states and 3313 transitions. [2020-10-27 04:57:48,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:57:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3313 transitions. [2020-10-27 04:57:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 04:57:48,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:48,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:57:48,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 04:57:48,742 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1099944834, now seen corresponding path program 1 times [2020-10-27 04:57:48,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:48,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979402805] [2020-10-27 04:57:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:48,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:48,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:48,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:49,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:49,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:49,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:51,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:51,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 04:57:51,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:57:51,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2651 [2020-10-27 04:57:51,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:51,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:57:51,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 04:57:51,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 04:57:51,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:51,741 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:51,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:51,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:51,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:51,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:51,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:51,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 04:57:51,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:51,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:57:51,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:51,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:57:51,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:51,774 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 04:57:51,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979402805] [2020-10-27 04:57:51,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:51,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:57:51,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861877639] [2020-10-27 04:57:51,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:57:51,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:51,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:57:51,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:57:51,776 INFO L87 Difference]: Start difference. First operand 2211 states and 3313 transitions. Second operand 5 states. [2020-10-27 04:57:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:52,623 INFO L93 Difference]: Finished difference Result 3834 states and 5727 transitions. [2020-10-27 04:57:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:57:52,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-27 04:57:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:52,631 INFO L225 Difference]: With dead ends: 3834 [2020-10-27 04:57:52,631 INFO L226 Difference]: Without dead ends: 1697 [2020-10-27 04:57:52,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:57:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2020-10-27 04:57:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1697. [2020-10-27 04:57:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1697 states. [2020-10-27 04:57:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2523 transitions. [2020-10-27 04:57:52,804 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2523 transitions. Word has length 67 [2020-10-27 04:57:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:52,804 INFO L481 AbstractCegarLoop]: Abstraction has 1697 states and 2523 transitions. [2020-10-27 04:57:52,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:57:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2523 transitions. [2020-10-27 04:57:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 04:57:52,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:52,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:57:52,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 04:57:52,809 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1480520886, now seen corresponding path program 1 times [2020-10-27 04:57:52,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:52,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22927210] [2020-10-27 04:57:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:52,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:52,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:53,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:53,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:53,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 04:57:53,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:57:53,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 812 [2020-10-27 04:57:53,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:57:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 04:57:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 04:57:53,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:53,951 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:53,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:53,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:53,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:53,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:53,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:53,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 04:57:53,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:57:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:57:53,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:53,983 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 04:57:53,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22927210] [2020-10-27 04:57:53,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:53,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:57:53,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655041582] [2020-10-27 04:57:53,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:57:53,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:57:53,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:57:53,986 INFO L87 Difference]: Start difference. First operand 1697 states and 2523 transitions. Second operand 4 states. [2020-10-27 04:57:54,313 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:57:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:55,157 INFO L93 Difference]: Finished difference Result 4091 states and 6313 transitions. [2020-10-27 04:57:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:57:55,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 04:57:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:55,173 INFO L225 Difference]: With dead ends: 4091 [2020-10-27 04:57:55,173 INFO L226 Difference]: Without dead ends: 2834 [2020-10-27 04:57:55,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:57:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2020-10-27 04:57:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2813. [2020-10-27 04:57:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2813 states. [2020-10-27 04:57:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 4257 transitions. [2020-10-27 04:57:55,572 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 4257 transitions. Word has length 67 [2020-10-27 04:57:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:55,573 INFO L481 AbstractCegarLoop]: Abstraction has 2813 states and 4257 transitions. [2020-10-27 04:57:55,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:57:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 4257 transitions. [2020-10-27 04:57:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 04:57:55,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:55,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:57:55,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 04:57:55,577 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:55,578 INFO L82 PathProgramCache]: Analyzing trace with hash -895611381, now seen corresponding path program 1 times [2020-10-27 04:57:55,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:55,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991491793] [2020-10-27 04:57:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:55,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:55,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:55,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:56,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:56,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:56,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 04:57:56,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:57:56,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1310 [2020-10-27 04:57:56,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:56,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:57:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:57:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 04:57:56,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:57,264 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:57:57,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:57:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:57,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:57,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:57:57,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:57:57,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:57:57,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 04:57:57,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:57:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:57:57,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:57:57,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:57:57,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:57:57,303 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 04:57:57,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991491793] [2020-10-27 04:57:57,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:57:57,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:57:57,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466538704] [2020-10-27 04:57:57,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:57:57,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:57:57,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:57:57,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:57:57,305 INFO L87 Difference]: Start difference. First operand 2813 states and 4257 transitions. Second operand 5 states. [2020-10-27 04:57:58,474 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:57:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:57:58,763 INFO L93 Difference]: Finished difference Result 6927 states and 10610 transitions. [2020-10-27 04:57:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:57:58,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-27 04:57:58,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:57:58,792 INFO L225 Difference]: With dead ends: 6927 [2020-10-27 04:57:58,792 INFO L226 Difference]: Without dead ends: 4554 [2020-10-27 04:57:58,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:57:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2020-10-27 04:57:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 4549. [2020-10-27 04:57:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4549 states. [2020-10-27 04:57:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 6800 transitions. [2020-10-27 04:57:59,402 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 6800 transitions. Word has length 70 [2020-10-27 04:57:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:57:59,403 INFO L481 AbstractCegarLoop]: Abstraction has 4549 states and 6800 transitions. [2020-10-27 04:57:59,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:57:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 6800 transitions. [2020-10-27 04:57:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 04:57:59,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:57:59,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:57:59,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 04:57:59,409 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:57:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:57:59,410 INFO L82 PathProgramCache]: Analyzing trace with hash -860214976, now seen corresponding path program 1 times [2020-10-27 04:57:59,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:57:59,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051040346] [2020-10-27 04:57:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:57:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:57:59,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:59,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:59,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:59,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:57:59,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:00,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:00,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 04:58:00,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:58:00,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1513 [2020-10-27 04:58:00,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:58:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:58:00,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 04:58:00,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:01,296 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:58:01,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:58:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:01,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:01,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:01,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:58:01,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:58:01,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 04:58:01,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:58:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:58:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:58:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:01,335 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 04:58:01,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051040346] [2020-10-27 04:58:01,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:58:01,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:58:01,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424825178] [2020-10-27 04:58:01,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:58:01,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:58:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:58:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:58:01,338 INFO L87 Difference]: Start difference. First operand 4549 states and 6800 transitions. Second operand 5 states. [2020-10-27 04:58:02,841 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:58:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:58:03,314 INFO L93 Difference]: Finished difference Result 11226 states and 16979 transitions. [2020-10-27 04:58:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:58:03,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-27 04:58:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:58:03,357 INFO L225 Difference]: With dead ends: 11226 [2020-10-27 04:58:03,357 INFO L226 Difference]: Without dead ends: 7375 [2020-10-27 04:58:03,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:58:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7375 states. [2020-10-27 04:58:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7375 to 7372. [2020-10-27 04:58:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7372 states. [2020-10-27 04:58:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7372 states to 7372 states and 10907 transitions. [2020-10-27 04:58:04,219 INFO L78 Accepts]: Start accepts. Automaton has 7372 states and 10907 transitions. Word has length 72 [2020-10-27 04:58:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:58:04,219 INFO L481 AbstractCegarLoop]: Abstraction has 7372 states and 10907 transitions. [2020-10-27 04:58:04,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:58:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7372 states and 10907 transitions. [2020-10-27 04:58:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 04:58:04,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:58:04,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:58:04,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 04:58:04,230 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:58:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:58:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1907023328, now seen corresponding path program 1 times [2020-10-27 04:58:04,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:58:04,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46285910] [2020-10-27 04:58:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:58:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:04,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:04,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:04,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:04,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:06,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:06,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 04:58:06,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:58:06,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2159 [2020-10-27 04:58:06,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:58:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:58:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 04:58:06,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:06,765 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:58:06,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:58:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:06,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:06,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:06,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:58:06,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:58:06,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 04:58:06,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:58:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:58:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:58:06,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:06,815 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 04:58:06,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46285910] [2020-10-27 04:58:06,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:58:06,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:58:06,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320966890] [2020-10-27 04:58:06,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:58:06,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:58:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:58:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:58:06,817 INFO L87 Difference]: Start difference. First operand 7372 states and 10907 transitions. Second operand 8 states. [2020-10-27 04:58:07,179 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:58:08,584 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 04:58:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:58:10,114 INFO L93 Difference]: Finished difference Result 19302 states and 29053 transitions. [2020-10-27 04:58:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:58:10,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-27 04:58:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:58:10,146 INFO L225 Difference]: With dead ends: 19302 [2020-10-27 04:58:10,146 INFO L226 Difference]: Without dead ends: 13039 [2020-10-27 04:58:10,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-27 04:58:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13039 states. [2020-10-27 04:58:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13039 to 8007. [2020-10-27 04:58:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8007 states. [2020-10-27 04:58:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8007 states to 8007 states and 11622 transitions. [2020-10-27 04:58:11,159 INFO L78 Accepts]: Start accepts. Automaton has 8007 states and 11622 transitions. Word has length 73 [2020-10-27 04:58:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:58:11,160 INFO L481 AbstractCegarLoop]: Abstraction has 8007 states and 11622 transitions. [2020-10-27 04:58:11,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:58:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8007 states and 11622 transitions. [2020-10-27 04:58:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 04:58:11,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:58:11,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:58:11,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 04:58:11,169 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:58:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:58:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash -498808309, now seen corresponding path program 1 times [2020-10-27 04:58:11,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:58:11,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110688764] [2020-10-27 04:58:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:58:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:11,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:11,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:11,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:11,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:11,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 04:58:11,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:58:11,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-27 04:58:11,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:58:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 04:58:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 04:58:11,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:12,071 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:58:12,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:58:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:12,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:12,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:58:12,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:58:12,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:58:12,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:12,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:58:12,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:58:12,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:58:12,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:12,100 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 04:58:12,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110688764] [2020-10-27 04:58:12,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:58:12,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:58:12,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908652109] [2020-10-27 04:58:12,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:58:12,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:58:12,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:58:12,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:58:12,102 INFO L87 Difference]: Start difference. First operand 8007 states and 11622 transitions. Second operand 4 states. [2020-10-27 04:58:12,426 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:58:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:58:14,625 INFO L93 Difference]: Finished difference Result 19913 states and 29566 transitions. [2020-10-27 04:58:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:58:14,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-27 04:58:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:58:14,650 INFO L225 Difference]: With dead ends: 19913 [2020-10-27 04:58:14,650 INFO L226 Difference]: Without dead ends: 13650 [2020-10-27 04:58:14,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:58:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13650 states. [2020-10-27 04:58:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13650 to 13547. [2020-10-27 04:58:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13547 states. [2020-10-27 04:58:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13547 states to 13547 states and 19782 transitions. [2020-10-27 04:58:16,409 INFO L78 Accepts]: Start accepts. Automaton has 13547 states and 19782 transitions. Word has length 73 [2020-10-27 04:58:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:58:16,409 INFO L481 AbstractCegarLoop]: Abstraction has 13547 states and 19782 transitions. [2020-10-27 04:58:16,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:58:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 13547 states and 19782 transitions. [2020-10-27 04:58:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 04:58:16,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:58:16,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:58:16,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 04:58:16,418 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:58:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:58:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash 260498771, now seen corresponding path program 1 times [2020-10-27 04:58:16,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:58:16,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488628557] [2020-10-27 04:58:16,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:58:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:16,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:16,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:16,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:16,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:16,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:21,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:21,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 04:58:21,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:58:21,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 04:58:21,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:21,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:58:21,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:58:21,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 04:58:21,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:21,803 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:58:21,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:58:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:21,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:21,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:21,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:58:21,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:58:21,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 04:58:21,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:21,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:58:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:58:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:58:21,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:21,850 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 04:58:21,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488628557] [2020-10-27 04:58:21,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:58:21,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:58:21,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908771468] [2020-10-27 04:58:21,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:58:21,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:58:21,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:58:21,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:58:21,852 INFO L87 Difference]: Start difference. First operand 13547 states and 19782 transitions. Second operand 8 states. [2020-10-27 04:58:22,206 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:58:23,798 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 04:58:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:58:26,240 INFO L93 Difference]: Finished difference Result 26669 states and 39154 transitions. [2020-10-27 04:58:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:58:26,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-27 04:58:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:58:26,286 INFO L225 Difference]: With dead ends: 26669 [2020-10-27 04:58:26,286 INFO L226 Difference]: Without dead ends: 21586 [2020-10-27 04:58:26,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:58:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21586 states. [2020-10-27 04:58:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21586 to 13547. [2020-10-27 04:58:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13547 states. [2020-10-27 04:58:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13547 states to 13547 states and 19742 transitions. [2020-10-27 04:58:28,195 INFO L78 Accepts]: Start accepts. Automaton has 13547 states and 19742 transitions. Word has length 75 [2020-10-27 04:58:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:58:28,195 INFO L481 AbstractCegarLoop]: Abstraction has 13547 states and 19742 transitions. [2020-10-27 04:58:28,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:58:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 13547 states and 19742 transitions. [2020-10-27 04:58:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 04:58:28,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:58:28,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:58:28,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 04:58:28,208 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:58:28,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:58:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1947637267, now seen corresponding path program 1 times [2020-10-27 04:58:28,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:58:28,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934814672] [2020-10-27 04:58:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:58:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:28,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:28,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:28,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:28,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:29,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:31,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:31,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 04:58:31,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:58:31,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3651 [2020-10-27 04:58:31,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:31,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:58:31,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 04:58:31,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 04:58:31,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:32,226 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:58:32,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:58:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:32,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:32,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:32,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:58:32,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:58:32,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:58:32,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:32,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:58:32,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:58:32,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:58:32,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:32,254 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 04:58:32,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934814672] [2020-10-27 04:58:32,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:58:32,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:58:32,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238012885] [2020-10-27 04:58:32,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:58:32,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:58:32,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:58:32,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:58:32,256 INFO L87 Difference]: Start difference. First operand 13547 states and 19742 transitions. Second operand 5 states. [2020-10-27 04:58:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:58:34,336 INFO L93 Difference]: Finished difference Result 24885 states and 36241 transitions. [2020-10-27 04:58:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:58:34,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 04:58:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:58:34,358 INFO L225 Difference]: With dead ends: 24885 [2020-10-27 04:58:34,358 INFO L226 Difference]: Without dead ends: 11547 [2020-10-27 04:58:34,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:58:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11547 states. [2020-10-27 04:58:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11547 to 11537. [2020-10-27 04:58:36,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11537 states. [2020-10-27 04:58:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 16763 transitions. [2020-10-27 04:58:36,048 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 16763 transitions. Word has length 75 [2020-10-27 04:58:36,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:58:36,048 INFO L481 AbstractCegarLoop]: Abstraction has 11537 states and 16763 transitions. [2020-10-27 04:58:36,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:58:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 16763 transitions. [2020-10-27 04:58:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 04:58:36,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:58:36,054 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] [2020-10-27 04:58:36,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 04:58:36,055 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:58:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:58:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2035536324, now seen corresponding path program 1 times [2020-10-27 04:58:36,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:58:36,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586799018] [2020-10-27 04:58:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:58:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:36,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:36,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:36,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:36,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:36,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:37,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:38,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:38,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 04:58:38,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 04:58:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2784 [2020-10-27 04:58:38,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:58:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:58:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 04:58:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:39,185 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:58:39,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:58:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:39,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:39,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:39,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:58:39,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:58:39,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 04:58:39,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:58:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:58:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:58:39,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:39,221 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 04:58:39,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586799018] [2020-10-27 04:58:39,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:58:39,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:58:39,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582390052] [2020-10-27 04:58:39,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:58:39,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:58:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:58:39,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:58:39,223 INFO L87 Difference]: Start difference. First operand 11537 states and 16763 transitions. Second operand 5 states. [2020-10-27 04:58:39,543 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:58:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:58:42,378 INFO L93 Difference]: Finished difference Result 21780 states and 31481 transitions. [2020-10-27 04:58:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 04:58:42,378 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-27 04:58:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:58:42,396 INFO L225 Difference]: With dead ends: 21780 [2020-10-27 04:58:42,396 INFO L226 Difference]: Without dead ends: 13783 [2020-10-27 04:58:42,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:58:42,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2020-10-27 04:58:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 13780. [2020-10-27 04:58:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13780 states. [2020-10-27 04:58:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13780 states to 13780 states and 19621 transitions. [2020-10-27 04:58:44,327 INFO L78 Accepts]: Start accepts. Automaton has 13780 states and 19621 transitions. Word has length 78 [2020-10-27 04:58:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:58:44,327 INFO L481 AbstractCegarLoop]: Abstraction has 13780 states and 19621 transitions. [2020-10-27 04:58:44,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:58:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 13780 states and 19621 transitions. [2020-10-27 04:58:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 04:58:44,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:58:44,335 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] [2020-10-27 04:58:44,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 04:58:44,336 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:58:44,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:58:44,336 INFO L82 PathProgramCache]: Analyzing trace with hash -445346631, now seen corresponding path program 1 times [2020-10-27 04:58:44,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:58:44,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204971836] [2020-10-27 04:58:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:58:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:44,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:44,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:44,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:44,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:44,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:48,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:48,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 04:58:48,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:58:48,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3932 [2020-10-27 04:58:48,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:58:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:58:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 04:58:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:48,635 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:58:48,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:58:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:48,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:48,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:48,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:58:48,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:58:48,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:58:48,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:58:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:58:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:58:48,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:48,665 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 04:58:48,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204971836] [2020-10-27 04:58:48,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:58:48,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:58:48,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886145443] [2020-10-27 04:58:48,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:58:48,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:58:48,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:58:48,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:58:48,668 INFO L87 Difference]: Start difference. First operand 13780 states and 19621 transitions. Second operand 5 states. [2020-10-27 04:58:48,992 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:58:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:58:51,965 INFO L93 Difference]: Finished difference Result 25285 states and 36109 transitions. [2020-10-27 04:58:51,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:58:51,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-27 04:58:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:58:51,985 INFO L225 Difference]: With dead ends: 25285 [2020-10-27 04:58:51,985 INFO L226 Difference]: Without dead ends: 15073 [2020-10-27 04:58:52,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:58:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15073 states. [2020-10-27 04:58:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15073 to 15006. [2020-10-27 04:58:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15006 states. [2020-10-27 04:58:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15006 states to 15006 states and 21274 transitions. [2020-10-27 04:58:54,120 INFO L78 Accepts]: Start accepts. Automaton has 15006 states and 21274 transitions. Word has length 78 [2020-10-27 04:58:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:58:54,121 INFO L481 AbstractCegarLoop]: Abstraction has 15006 states and 21274 transitions. [2020-10-27 04:58:54,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:58:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 15006 states and 21274 transitions. [2020-10-27 04:58:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 04:58:54,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:58:54,130 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] [2020-10-27 04:58:54,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 04:58:54,131 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:58:54,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:58:54,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1603232523, now seen corresponding path program 1 times [2020-10-27 04:58:54,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:58:54,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948228084] [2020-10-27 04:58:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:58:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:54,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:54,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:54,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:54,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:55,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:59,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:59,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 04:58:59,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:58:59,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 04:58:59,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:58:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:58:59,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 04:58:59,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:59,536 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:58:59,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:58:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:58:59,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:58:59,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:58:59,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:58:59,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:58:59,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 04:58:59,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:58:59,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:58:59,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:58:59,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:58:59,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:58:59,587 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 04:58:59,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948228084] [2020-10-27 04:58:59,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:58:59,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 04:58:59,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572152500] [2020-10-27 04:58:59,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 04:58:59,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:58:59,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 04:58:59,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:58:59,590 INFO L87 Difference]: Start difference. First operand 15006 states and 21274 transitions. Second operand 9 states. [2020-10-27 04:58:59,944 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:59:02,365 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 192 [2020-10-27 04:59:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:59:04,932 INFO L93 Difference]: Finished difference Result 32591 states and 46825 transitions. [2020-10-27 04:59:04,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 04:59:04,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-10-27 04:59:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:59:04,953 INFO L225 Difference]: With dead ends: 32591 [2020-10-27 04:59:04,953 INFO L226 Difference]: Without dead ends: 20893 [2020-10-27 04:59:04,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-27 04:59:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20893 states. [2020-10-27 04:59:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20893 to 16304. [2020-10-27 04:59:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16304 states. [2020-10-27 04:59:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16304 states to 16304 states and 22753 transitions. [2020-10-27 04:59:07,374 INFO L78 Accepts]: Start accepts. Automaton has 16304 states and 22753 transitions. Word has length 79 [2020-10-27 04:59:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:59:07,374 INFO L481 AbstractCegarLoop]: Abstraction has 16304 states and 22753 transitions. [2020-10-27 04:59:07,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 04:59:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 16304 states and 22753 transitions. [2020-10-27 04:59:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 04:59:07,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:59:07,383 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] [2020-10-27 04:59:07,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 04:59:07,384 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:59:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:59:07,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1745435315, now seen corresponding path program 1 times [2020-10-27 04:59:07,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:59:07,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405712786] [2020-10-27 04:59:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:59:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:59:07,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:07,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:07,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:07,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:09,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:59:09,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 04:59:09,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:59:09,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2246 [2020-10-27 04:59:09,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:59:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:59:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:59:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 04:59:09,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:59:10,004 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:59:10,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:59:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:59:10,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:10,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:59:10,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:59:10,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:59:10,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 04:59:10,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:59:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:59:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:59:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:59:10,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:59:10,050 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 04:59:10,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405712786] [2020-10-27 04:59:10,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:59:10,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:59:10,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330486022] [2020-10-27 04:59:10,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:59:10,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:59:10,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:59:10,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:59:10,051 INFO L87 Difference]: Start difference. First operand 16304 states and 22753 transitions. Second operand 8 states. [2020-10-27 04:59:10,402 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:59:12,244 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 04:59:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:59:14,977 INFO L93 Difference]: Finished difference Result 25385 states and 35553 transitions. [2020-10-27 04:59:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:59:14,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-10-27 04:59:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:59:15,000 INFO L225 Difference]: With dead ends: 25385 [2020-10-27 04:59:15,000 INFO L226 Difference]: Without dead ends: 20775 [2020-10-27 04:59:15,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:59:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20775 states. [2020-10-27 04:59:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20775 to 16185. [2020-10-27 04:59:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16185 states. [2020-10-27 04:59:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16185 states to 16185 states and 22534 transitions. [2020-10-27 04:59:17,359 INFO L78 Accepts]: Start accepts. Automaton has 16185 states and 22534 transitions. Word has length 79 [2020-10-27 04:59:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:59:17,360 INFO L481 AbstractCegarLoop]: Abstraction has 16185 states and 22534 transitions. [2020-10-27 04:59:17,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:59:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 16185 states and 22534 transitions. [2020-10-27 04:59:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 04:59:17,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:59:17,369 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] [2020-10-27 04:59:17,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 04:59:17,369 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:59:17,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:59:17,370 INFO L82 PathProgramCache]: Analyzing trace with hash 887209368, now seen corresponding path program 1 times [2020-10-27 04:59:17,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:59:17,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735597431] [2020-10-27 04:59:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:59:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:59:17,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:17,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:17,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:18,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:22,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:59:22,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 04:59:22,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:59:22,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4784 [2020-10-27 04:59:22,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:59:22,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:59:22,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:59:22,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 04:59:22,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:59:22,532 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:59:22,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:59:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:59:22,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:22,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:59:22,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:59:22,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:59:22,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 04:59:22,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:59:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:59:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:59:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:59:22,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:59:22,575 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 04:59:22,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735597431] [2020-10-27 04:59:22,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:59:22,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:59:22,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843921715] [2020-10-27 04:59:22,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:59:22,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:59:22,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:59:22,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:59:22,577 INFO L87 Difference]: Start difference. First operand 16185 states and 22534 transitions. Second operand 8 states. [2020-10-27 04:59:22,935 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:59:24,694 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 04:59:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:59:27,604 INFO L93 Difference]: Finished difference Result 26861 states and 37714 transitions. [2020-10-27 04:59:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:59:27,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-10-27 04:59:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:59:27,635 INFO L225 Difference]: With dead ends: 26861 [2020-10-27 04:59:27,635 INFO L226 Difference]: Without dead ends: 22208 [2020-10-27 04:59:27,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:59:27,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22208 states. [2020-10-27 04:59:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22208 to 16381. [2020-10-27 04:59:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16381 states. [2020-10-27 04:59:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16381 states to 16381 states and 22774 transitions. [2020-10-27 04:59:30,196 INFO L78 Accepts]: Start accepts. Automaton has 16381 states and 22774 transitions. Word has length 79 [2020-10-27 04:59:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:59:30,197 INFO L481 AbstractCegarLoop]: Abstraction has 16381 states and 22774 transitions. [2020-10-27 04:59:30,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:59:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 16381 states and 22774 transitions. [2020-10-27 04:59:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 04:59:30,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:59:30,207 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] [2020-10-27 04:59:30,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 04:59:30,207 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:59:30,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:59:30,207 INFO L82 PathProgramCache]: Analyzing trace with hash 745006576, now seen corresponding path program 1 times [2020-10-27 04:59:30,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:59:30,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206385151] [2020-10-27 04:59:30,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:59:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:59:30,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:30,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:30,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:30,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:59:30,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 04:59:30,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:59:30,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-27 04:59:30,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:59:30,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:59:30,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 04:59:30,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 04:59:30,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:59:30,999 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:59:31,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:59:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:59:31,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:31,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:59:31,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:59:31,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:59:31,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:59:31,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:59:31,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:59:31,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:59:31,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:59:31,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:59:31,032 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 04:59:31,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206385151] [2020-10-27 04:59:31,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:59:31,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:59:31,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511425858] [2020-10-27 04:59:31,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:59:31,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:59:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:59:31,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:59:31,034 INFO L87 Difference]: Start difference. First operand 16381 states and 22774 transitions. Second operand 6 states. [2020-10-27 04:59:31,385 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:59:33,844 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:59:34,154 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 04:59:36,123 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:59:36,514 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:59:41,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:59:41,154 INFO L93 Difference]: Finished difference Result 62079 states and 90042 transitions. [2020-10-27 04:59:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 04:59:41,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-27 04:59:41,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:59:41,221 INFO L225 Difference]: With dead ends: 62079 [2020-10-27 04:59:41,221 INFO L226 Difference]: Without dead ends: 49644 [2020-10-27 04:59:41,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:59:41,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49644 states. [2020-10-27 04:59:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49644 to 28574. [2020-10-27 04:59:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28574 states. [2020-10-27 04:59:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28574 states to 28574 states and 40152 transitions. [2020-10-27 04:59:46,314 INFO L78 Accepts]: Start accepts. Automaton has 28574 states and 40152 transitions. Word has length 79 [2020-10-27 04:59:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:59:46,315 INFO L481 AbstractCegarLoop]: Abstraction has 28574 states and 40152 transitions. [2020-10-27 04:59:46,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:59:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28574 states and 40152 transitions. [2020-10-27 04:59:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 04:59:46,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:59:46,326 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] [2020-10-27 04:59:46,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 04:59:46,326 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:59:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:59:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash 842805872, now seen corresponding path program 1 times [2020-10-27 04:59:46,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:59:46,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664105118] [2020-10-27 04:59:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:59:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:59:46,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:46,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:46,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:47,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:59:47,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 04:59:47,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:59:47,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-27 04:59:47,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:59:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:59:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 04:59:47,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 04:59:47,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:59:48,058 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:59:48,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:59:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:59:48,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:59:48,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:59:48,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:59:48,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:59:48,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:59:48,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:59:48,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:59:48,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:59:48,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:59:48,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:59:48,085 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 04:59:48,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664105118] [2020-10-27 04:59:48,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:59:48,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:59:48,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409103833] [2020-10-27 04:59:48,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:59:48,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:59:48,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:59:48,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:59:48,086 INFO L87 Difference]: Start difference. First operand 28574 states and 40152 transitions. Second operand 5 states. [2020-10-27 04:59:48,442 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:59:51,018 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:59:51,356 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:59:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:59:57,391 INFO L93 Difference]: Finished difference Result 55138 states and 78845 transitions. [2020-10-27 04:59:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:59:57,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-27 04:59:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:59:57,439 INFO L225 Difference]: With dead ends: 55138 [2020-10-27 04:59:57,439 INFO L226 Difference]: Without dead ends: 40938 [2020-10-27 04:59:57,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:59:57,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40938 states. [2020-10-27 05:00:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40938 to 40724. [2020-10-27 05:00:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40724 states. [2020-10-27 05:00:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40724 states to 40724 states and 57292 transitions. [2020-10-27 05:00:04,581 INFO L78 Accepts]: Start accepts. Automaton has 40724 states and 57292 transitions. Word has length 80 [2020-10-27 05:00:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:00:04,582 INFO L481 AbstractCegarLoop]: Abstraction has 40724 states and 57292 transitions. [2020-10-27 05:00:04,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:00:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 40724 states and 57292 transitions. [2020-10-27 05:00:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:00:04,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:00:04,591 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] [2020-10-27 05:00:04,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:00:04,591 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:00:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:00:04,592 INFO L82 PathProgramCache]: Analyzing trace with hash -289870883, now seen corresponding path program 1 times [2020-10-27 05:00:04,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:00:04,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440723976] [2020-10-27 05:00:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:00:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:00:04,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:04,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:04,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:04,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:05,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:00:05,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:00:05,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:00:05,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-27 05:00:05,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:00:05,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:00:05,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 05:00:05,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 05:00:05,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:00:05,777 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:00:05,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:00:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:00:05,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:05,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:00:05,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:00:05,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:00:05,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:00:05,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:00:05,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:00:05,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:00:05,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:00:05,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:00:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:00:05,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440723976] [2020-10-27 05:00:05,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:00:05,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:00:05,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880571593] [2020-10-27 05:00:05,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:00:05,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:00:05,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:00:05,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:00:05,804 INFO L87 Difference]: Start difference. First operand 40724 states and 57292 transitions. Second operand 5 states. [2020-10-27 05:00:06,134 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:00:09,055 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:00:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:00:19,926 INFO L93 Difference]: Finished difference Result 109362 states and 157212 transitions. [2020-10-27 05:00:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:00:19,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-27 05:00:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:00:20,143 INFO L225 Difference]: With dead ends: 109362 [2020-10-27 05:00:20,143 INFO L226 Difference]: Without dead ends: 74177 [2020-10-27 05:00:20,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:00:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74177 states. [2020-10-27 05:00:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74177 to 57627. [2020-10-27 05:00:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57627 states. [2020-10-27 05:00:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57627 states to 57627 states and 81475 transitions. [2020-10-27 05:00:30,594 INFO L78 Accepts]: Start accepts. Automaton has 57627 states and 81475 transitions. Word has length 80 [2020-10-27 05:00:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:00:30,594 INFO L481 AbstractCegarLoop]: Abstraction has 57627 states and 81475 transitions. [2020-10-27 05:00:30,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:00:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 57627 states and 81475 transitions. [2020-10-27 05:00:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:00:30,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:00:30,605 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] [2020-10-27 05:00:30,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:00:30,605 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:00:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:00:30,605 INFO L82 PathProgramCache]: Analyzing trace with hash 369385700, now seen corresponding path program 1 times [2020-10-27 05:00:30,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:00:30,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024732968] [2020-10-27 05:00:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:00:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:00:30,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:30,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:30,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:31,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:00:31,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:00:31,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:00:31,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1369 [2020-10-27 05:00:31,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:00:31,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:00:31,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 05:00:31,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:00:31,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:00:32,343 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:00:32,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:00:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:00:32,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:00:32,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:00:32,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:00:32,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:00:32,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:00:32,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:00:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:00:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:00:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:00:32,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:00:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:00:32,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024732968] [2020-10-27 05:00:32,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:00:32,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:00:32,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881578174] [2020-10-27 05:00:32,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:00:32,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:00:32,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:00:32,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:00:32,373 INFO L87 Difference]: Start difference. First operand 57627 states and 81475 transitions. Second operand 5 states. [2020-10-27 05:00:32,730 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:00:35,508 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:00:35,847 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 191