/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:30:32,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:30:32,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:30:32,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:30:32,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:30:32,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:30:32,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:30:32,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:30:32,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:30:32,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:30:32,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:30:32,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:30:32,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:30:32,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:30:32,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:30:32,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:30:32,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:30:32,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:30:32,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:30:32,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:30:32,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:30:32,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:30:32,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:30:32,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:30:32,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:30:32,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:30:32,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:30:32,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:30:32,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:30:33,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:30:33,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:30:33,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:30:33,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:30:33,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:30:33,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:30:33,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:30:33,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:30:33,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:30:33,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:30:33,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:30:33,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:30:33,017 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 [2020-10-28 18:30:33,074 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:30:33,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:30:33,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:30:33,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:30:33,079 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:30:33,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:30:33,080 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:30:33,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:30:33,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:30:33,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:30:33,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:30:33,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:30:33,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:30:33,082 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:30:33,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:30:33,083 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:30:33,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:30:33,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:30:33,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:30:33,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:30:33,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:30:33,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:30:33,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:30:33,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:30:33,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:30:33,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:30:33,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:30:33,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:30:33,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:30:33,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:30:33,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:30:33,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:30:33,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:30:33,595 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:30:33,596 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:30:33,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 18:30:33,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8112874c5/96670c5be2dc4148a11cba29a3392a31/FLAG7b04c81b5 [2020-10-28 18:30:34,621 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:30:34,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 18:30:34,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8112874c5/96670c5be2dc4148a11cba29a3392a31/FLAG7b04c81b5 [2020-10-28 18:30:34,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8112874c5/96670c5be2dc4148a11cba29a3392a31 [2020-10-28 18:30:34,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:30:34,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:30:34,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:30:34,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:30:34,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:30:34,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:30:34" (1/1) ... [2020-10-28 18:30:34,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0e1fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:34, skipping insertion in model container [2020-10-28 18:30:34,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:30:34" (1/1) ... [2020-10-28 18:30:34,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:30:34,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:30:35,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:30:35,586 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:30:35,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:30:35,939 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:30:35,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35 WrapperNode [2020-10-28 18:30:35,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:30:35,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:30:35,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:30:35,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:30:35,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35" (1/1) ... [2020-10-28 18:30:35,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35" (1/1) ... [2020-10-28 18:30:36,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35" (1/1) ... [2020-10-28 18:30:36,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35" (1/1) ... [2020-10-28 18:30:36,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35" (1/1) ... [2020-10-28 18:30:36,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35" (1/1) ... [2020-10-28 18:30:36,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35" (1/1) ... [2020-10-28 18:30:36,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:30:36,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:30:36,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:30:36,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:30:36,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:30:36,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:30:36,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:30:36,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:30:36,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:30:36,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:30:36,249 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:30:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:30:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:30:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:30:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:30:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:30:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:30:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:30:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:30:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:30:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:30:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:30:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:30:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:30:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:30:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:30:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:30:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:30:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:30:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:30:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:30:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:30:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:30:38,447 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:30:38,448 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:30:38,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:30:38 BoogieIcfgContainer [2020-10-28 18:30:38,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:30:38,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:30:38,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:30:38,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:30:38,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:30:34" (1/3) ... [2020-10-28 18:30:38,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9a7b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:30:38, skipping insertion in model container [2020-10-28 18:30:38,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:35" (2/3) ... [2020-10-28 18:30:38,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9a7b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:30:38, skipping insertion in model container [2020-10-28 18:30:38,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:30:38" (3/3) ... [2020-10-28 18:30:38,475 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 18:30:38,487 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:30:38,494 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:30:38,508 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:30:38,541 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:30:38,541 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:30:38,542 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:30:38,542 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:30:38,542 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:30:38,542 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:30:38,542 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:30:38,542 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:30:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states. [2020-10-28 18:30:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:30:38,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:38,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:38,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:38,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:38,600 INFO L82 PathProgramCache]: Analyzing trace with hash 445602210, now seen corresponding path program 1 times [2020-10-28 18:30:38,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:38,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144925257] [2020-10-28 18:30:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:39,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:39,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:39,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:40,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:41,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:41,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:42,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:42,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:42,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:42,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:43,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:43,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:43,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:30:43,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:30:43,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:30:43,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:43,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:43,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:30:43,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:30:43,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:30:43,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:30:44,363 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2020-10-28 18:30:45,188 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:30:45,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:45,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:45,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:45,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:45,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:45,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 18:30:45,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:45,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:45,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:45,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:30:45,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:30:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:45,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144925257] [2020-10-28 18:30:45,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:45,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:30:45,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733574180] [2020-10-28 18:30:45,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:30:45,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:45,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:30:45,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:30:45,381 INFO L87 Difference]: Start difference. First operand 579 states. Second operand 6 states. [2020-10-28 18:30:46,375 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:30:51,454 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:30:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:51,913 INFO L93 Difference]: Finished difference Result 900 states and 1527 transitions. [2020-10-28 18:30:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:30:51,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:30:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:51,952 INFO L225 Difference]: With dead ends: 900 [2020-10-28 18:30:51,953 INFO L226 Difference]: Without dead ends: 606 [2020-10-28 18:30:51,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-28 18:30:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 566. [2020-10-28 18:30:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-10-28 18:30:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 730 transitions. [2020-10-28 18:30:52,134 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 730 transitions. Word has length 65 [2020-10-28 18:30:52,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:52,135 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 730 transitions. [2020-10-28 18:30:52,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:30:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 730 transitions. [2020-10-28 18:30:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:30:52,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:52,150 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] [2020-10-28 18:30:52,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:30:52,153 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash -965646780, now seen corresponding path program 1 times [2020-10-28 18:30:52,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:52,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294731362] [2020-10-28 18:30:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:52,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:53,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:53,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:54,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:55,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:56,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:56,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:57,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:57,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:30:57,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:30:57,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 18:30:57,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:57,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:57,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:30:57,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:57,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:30:57,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:30:58,359 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:30:58,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:58,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:58,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:58,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:58,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:30:58,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:58,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:58,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:58,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:58,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:58,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294731362] [2020-10-28 18:30:58,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:58,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:30:58,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568782748] [2020-10-28 18:30:58,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:30:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:58,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:30:58,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:30:58,445 INFO L87 Difference]: Start difference. First operand 566 states and 730 transitions. Second operand 8 states. [2020-10-28 18:30:59,453 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:31:03,224 WARN L193 SmtUtils]: Spent 962.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:31:04,488 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 18:31:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:05,378 INFO L93 Difference]: Finished difference Result 967 states and 1310 transitions. [2020-10-28 18:31:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:31:05,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 18:31:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:05,386 INFO L225 Difference]: With dead ends: 967 [2020-10-28 18:31:05,386 INFO L226 Difference]: Without dead ends: 837 [2020-10-28 18:31:05,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:31:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-10-28 18:31:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 564. [2020-10-28 18:31:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-10-28 18:31:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 727 transitions. [2020-10-28 18:31:05,435 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 727 transitions. Word has length 65 [2020-10-28 18:31:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:05,435 INFO L481 AbstractCegarLoop]: Abstraction has 564 states and 727 transitions. [2020-10-28 18:31:05,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:31:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 727 transitions. [2020-10-28 18:31:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:31:05,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:05,438 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] [2020-10-28 18:31:05,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:31:05,438 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2123568343, now seen corresponding path program 1 times [2020-10-28 18:31:05,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:05,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081133750] [2020-10-28 18:31:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:05,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:07,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:08,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:08,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:08,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:09,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:10,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:10,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:31:10,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:31:10,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:31:10,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:10,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:10,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:31:10,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:31:10,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:31:10,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:11,650 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:31:11,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:11,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:11,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:11,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:11,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:11,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:31:11,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:11,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:11,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:11,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:11,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:11,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:31:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:11,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081133750] [2020-10-28 18:31:11,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:11,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:31:11,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997564321] [2020-10-28 18:31:11,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:31:11,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:11,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:31:11,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:31:11,723 INFO L87 Difference]: Start difference. First operand 564 states and 727 transitions. Second operand 8 states. [2020-10-28 18:31:12,712 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:31:16,063 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:31:17,257 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:31:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:17,825 INFO L93 Difference]: Finished difference Result 839 states and 1116 transitions. [2020-10-28 18:31:17,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:31:17,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 18:31:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:17,837 INFO L225 Difference]: With dead ends: 839 [2020-10-28 18:31:17,837 INFO L226 Difference]: Without dead ends: 823 [2020-10-28 18:31:17,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:31:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2020-10-28 18:31:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 562. [2020-10-28 18:31:17,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-10-28 18:31:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 724 transitions. [2020-10-28 18:31:17,891 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 724 transitions. Word has length 65 [2020-10-28 18:31:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:17,892 INFO L481 AbstractCegarLoop]: Abstraction has 562 states and 724 transitions. [2020-10-28 18:31:17,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:31:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 724 transitions. [2020-10-28 18:31:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:31:17,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:17,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:17,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:31:17,894 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:17,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1721728547, now seen corresponding path program 1 times [2020-10-28 18:31:17,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:17,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460589529] [2020-10-28 18:31:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:17,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:18,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:18,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:18,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:18,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:18,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:20,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:22,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:22,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:31:22,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:31:22,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:31:22,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:22,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:22,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:31:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:31:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:31:22,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:23,884 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:31:23,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:23,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:23,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:23,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:23,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:23,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:31:23,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:23,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:23,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:23,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:23,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:23,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:23,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460589529] [2020-10-28 18:31:23,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:23,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:31:23,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792743365] [2020-10-28 18:31:23,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:31:23,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:31:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:31:23,981 INFO L87 Difference]: Start difference. First operand 562 states and 724 transitions. Second operand 8 states. [2020-10-28 18:31:24,978 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:31:28,480 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:31:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:29,632 INFO L93 Difference]: Finished difference Result 965 states and 1306 transitions. [2020-10-28 18:31:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:31:29,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 18:31:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:29,638 INFO L225 Difference]: With dead ends: 965 [2020-10-28 18:31:29,638 INFO L226 Difference]: Without dead ends: 838 [2020-10-28 18:31:29,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:31:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2020-10-28 18:31:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 560. [2020-10-28 18:31:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-10-28 18:31:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 721 transitions. [2020-10-28 18:31:29,688 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 721 transitions. Word has length 65 [2020-10-28 18:31:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:29,689 INFO L481 AbstractCegarLoop]: Abstraction has 560 states and 721 transitions. [2020-10-28 18:31:29,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:31:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 721 transitions. [2020-10-28 18:31:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:31:29,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:29,691 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] [2020-10-28 18:31:29,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:31:29,691 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:29,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1996866258, now seen corresponding path program 1 times [2020-10-28 18:31:29,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:29,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594051490] [2020-10-28 18:31:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:29,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:29,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:30,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:30,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:30,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:31,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:31,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:34,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:34,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:31:34,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:31:34,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:31:34,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:34,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:34,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:31:34,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:31:34,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:31:34,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:35,811 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:31:35,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:35,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:35,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:35,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:35,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:31:35,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:35,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:35,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:35,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:35,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:35,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:35,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594051490] [2020-10-28 18:31:35,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:35,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:31:35,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466625026] [2020-10-28 18:31:35,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:31:35,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:35,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:31:35,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:31:35,891 INFO L87 Difference]: Start difference. First operand 560 states and 721 transitions. Second operand 8 states. [2020-10-28 18:31:36,850 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 18:31:40,381 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-28 18:31:41,438 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:31:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:42,319 INFO L93 Difference]: Finished difference Result 848 states and 1123 transitions. [2020-10-28 18:31:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:31:42,319 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 18:31:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:42,328 INFO L225 Difference]: With dead ends: 848 [2020-10-28 18:31:42,329 INFO L226 Difference]: Without dead ends: 819 [2020-10-28 18:31:42,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:31:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-10-28 18:31:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 549. [2020-10-28 18:31:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-10-28 18:31:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 706 transitions. [2020-10-28 18:31:42,380 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 706 transitions. Word has length 65 [2020-10-28 18:31:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:42,381 INFO L481 AbstractCegarLoop]: Abstraction has 549 states and 706 transitions. [2020-10-28 18:31:42,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:31:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 706 transitions. [2020-10-28 18:31:42,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:31:42,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:42,383 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] [2020-10-28 18:31:42,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:31:42,383 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:42,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:42,383 INFO L82 PathProgramCache]: Analyzing trace with hash 868169035, now seen corresponding path program 1 times [2020-10-28 18:31:42,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:42,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933046716] [2020-10-28 18:31:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:42,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:42,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:42,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:42,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:42,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:43,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:46,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:46,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:47,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:47,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:31:47,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:31:47,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:31:47,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:47,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:47,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:31:47,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:31:47,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:31:47,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:48,338 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:31:48,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:48,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:48,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:48,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:48,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:31:48,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:48,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:48,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:48,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933046716] [2020-10-28 18:31:48,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:48,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:31:48,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785274286] [2020-10-28 18:31:48,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:31:48,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:31:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:31:48,396 INFO L87 Difference]: Start difference. First operand 549 states and 706 transitions. Second operand 7 states. [2020-10-28 18:31:49,377 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:31:52,955 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:31:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:53,951 INFO L93 Difference]: Finished difference Result 956 states and 1291 transitions. [2020-10-28 18:31:53,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:31:53,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:31:53,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:53,957 INFO L225 Difference]: With dead ends: 956 [2020-10-28 18:31:53,958 INFO L226 Difference]: Without dead ends: 822 [2020-10-28 18:31:53,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:31:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2020-10-28 18:31:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 549. [2020-10-28 18:31:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-10-28 18:31:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 705 transitions. [2020-10-28 18:31:54,006 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 705 transitions. Word has length 67 [2020-10-28 18:31:54,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:54,006 INFO L481 AbstractCegarLoop]: Abstraction has 549 states and 705 transitions. [2020-10-28 18:31:54,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:31:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 705 transitions. [2020-10-28 18:31:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:31:54,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:54,008 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] [2020-10-28 18:31:54,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:31:54,008 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:54,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:54,009 INFO L82 PathProgramCache]: Analyzing trace with hash -426155862, now seen corresponding path program 1 times [2020-10-28 18:31:54,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:54,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811837935] [2020-10-28 18:31:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:54,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:54,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:54,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:54,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:54,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:54,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:55,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:58,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:58,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:58,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:59,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:59,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:59,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:31:59,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:31:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-28 18:31:59,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:59,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:31:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:31:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 18:31:59,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:00,068 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:32:00,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:00,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:00,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:00,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:00,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:00,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:32:00,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:00,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:00,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:32:00,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:00,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:32:00,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:00,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811837935] [2020-10-28 18:32:00,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:32:00,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:32:00,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701004085] [2020-10-28 18:32:00,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:32:00,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:32:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:32:00,130 INFO L87 Difference]: Start difference. First operand 549 states and 705 transitions. Second operand 8 states. [2020-10-28 18:32:01,167 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:32:04,998 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:32:05,940 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:32:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:07,294 INFO L93 Difference]: Finished difference Result 1226 states and 1682 transitions. [2020-10-28 18:32:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:32:07,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:32:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:07,300 INFO L225 Difference]: With dead ends: 1226 [2020-10-28 18:32:07,301 INFO L226 Difference]: Without dead ends: 1115 [2020-10-28 18:32:07,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:32:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-10-28 18:32:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 809. [2020-10-28 18:32:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-10-28 18:32:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1087 transitions. [2020-10-28 18:32:07,392 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1087 transitions. Word has length 67 [2020-10-28 18:32:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:07,393 INFO L481 AbstractCegarLoop]: Abstraction has 809 states and 1087 transitions. [2020-10-28 18:32:07,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:32:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1087 transitions. [2020-10-28 18:32:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:32:07,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:07,395 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] [2020-10-28 18:32:07,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:32:07,395 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:07,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1025904546, now seen corresponding path program 1 times [2020-10-28 18:32:07,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:07,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983644186] [2020-10-28 18:32:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:07,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:07,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:07,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:07,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:07,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:08,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:09,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:10,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:10,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:10,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:12,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:12,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:32:12,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:32:12,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:32:12,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:12,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:12,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:32:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:32:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:32:12,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:13,366 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:32:13,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:13,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:13,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:13,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:13,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:13,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:32:13,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:13,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:13,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:32:13,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:13,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:32:13,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:13,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983644186] [2020-10-28 18:32:13,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:32:13,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:32:13,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5590746] [2020-10-28 18:32:13,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:32:13,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:13,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:32:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:32:13,408 INFO L87 Difference]: Start difference. First operand 809 states and 1087 transitions. Second operand 8 states. [2020-10-28 18:32:14,422 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:32:18,492 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:32:19,411 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:32:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:21,014 INFO L93 Difference]: Finished difference Result 2480 states and 3543 transitions. [2020-10-28 18:32:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:32:21,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:32:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:21,039 INFO L225 Difference]: With dead ends: 2480 [2020-10-28 18:32:21,039 INFO L226 Difference]: Without dead ends: 2153 [2020-10-28 18:32:21,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:32:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2020-10-28 18:32:21,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1609. [2020-10-28 18:32:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-10-28 18:32:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2258 transitions. [2020-10-28 18:32:21,245 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2258 transitions. Word has length 67 [2020-10-28 18:32:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:21,245 INFO L481 AbstractCegarLoop]: Abstraction has 1609 states and 2258 transitions. [2020-10-28 18:32:21,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:32:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2258 transitions. [2020-10-28 18:32:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:32:21,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:21,247 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] [2020-10-28 18:32:21,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:32:21,248 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:21,248 INFO L82 PathProgramCache]: Analyzing trace with hash -998339452, now seen corresponding path program 1 times [2020-10-28 18:32:21,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:21,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699744591] [2020-10-28 18:32:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:21,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:21,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:21,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:21,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:21,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:21,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:26,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:26,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:32:26,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:32:26,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:32:26,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:26,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:32:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:32:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:32:26,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:27,272 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:32:27,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:27,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:27,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:27,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:27,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:27,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:32:27,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:27,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:27,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:32:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:32:27,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:27,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699744591] [2020-10-28 18:32:27,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:32:27,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:32:27,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137446903] [2020-10-28 18:32:27,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:32:27,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:32:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:32:27,319 INFO L87 Difference]: Start difference. First operand 1609 states and 2258 transitions. Second operand 7 states. [2020-10-28 18:32:28,312 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:32:32,180 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:32:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:33,595 INFO L93 Difference]: Finished difference Result 3359 states and 4855 transitions. [2020-10-28 18:32:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:32:33,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:32:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:33,608 INFO L225 Difference]: With dead ends: 3359 [2020-10-28 18:32:33,609 INFO L226 Difference]: Without dead ends: 2869 [2020-10-28 18:32:33,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:32:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2869 states. [2020-10-28 18:32:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2869 to 1609. [2020-10-28 18:32:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-10-28 18:32:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2257 transitions. [2020-10-28 18:32:33,831 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2257 transitions. Word has length 67 [2020-10-28 18:32:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:33,832 INFO L481 AbstractCegarLoop]: Abstraction has 1609 states and 2257 transitions. [2020-10-28 18:32:33,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:32:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2257 transitions. [2020-10-28 18:32:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:32:33,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:33,835 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] [2020-10-28 18:32:33,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:32:33,835 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:33,836 INFO L82 PathProgramCache]: Analyzing trace with hash -437075604, now seen corresponding path program 1 times [2020-10-28 18:32:33,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:33,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200132687] [2020-10-28 18:32:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:33,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:34,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:34,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:34,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:35,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:35,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:35,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:37,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:38,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:38,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:38,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:38,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:38,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:38,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:32:38,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:32:38,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:32:38,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:38,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:38,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:32:38,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:32:38,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:32:38,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:39,864 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:32:39,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:39,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:39,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:39,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:39,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:39,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:32:39,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:39,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:39,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:32:39,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:39,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:32:39,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:39,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200132687] [2020-10-28 18:32:39,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:32:39,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:32:39,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597036013] [2020-10-28 18:32:39,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:32:39,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:39,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:32:39,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:32:39,909 INFO L87 Difference]: Start difference. First operand 1609 states and 2257 transitions. Second operand 7 states. [2020-10-28 18:32:40,931 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:32:44,684 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:32:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:45,983 INFO L93 Difference]: Finished difference Result 3716 states and 5452 transitions. [2020-10-28 18:32:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:32:45,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:32:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:45,996 INFO L225 Difference]: With dead ends: 3716 [2020-10-28 18:32:45,996 INFO L226 Difference]: Without dead ends: 3066 [2020-10-28 18:32:45,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:32:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2020-10-28 18:32:46,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 1609. [2020-10-28 18:32:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-10-28 18:32:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2256 transitions. [2020-10-28 18:32:46,224 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2256 transitions. Word has length 67 [2020-10-28 18:32:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:46,224 INFO L481 AbstractCegarLoop]: Abstraction has 1609 states and 2256 transitions. [2020-10-28 18:32:46,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:32:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2256 transitions. [2020-10-28 18:32:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:32:46,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:46,227 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] [2020-10-28 18:32:46,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:32:46,227 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:46,228 INFO L82 PathProgramCache]: Analyzing trace with hash -663008654, now seen corresponding path program 1 times [2020-10-28 18:32:46,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:46,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509726193] [2020-10-28 18:32:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:46,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:46,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:46,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:46,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:47,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:47,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:47,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:48,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:51,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:51,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:32:51,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:32:51,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:32:51,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:51,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:51,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:32:51,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:32:51,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:32:51,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:52,244 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:32:52,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:52,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:52,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:52,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:52,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:52,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:32:52,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:52,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:52,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:32:52,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:52,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:32:52,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:52,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509726193] [2020-10-28 18:32:52,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:32:52,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:32:52,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750498918] [2020-10-28 18:32:52,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:32:52,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:32:52,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:32:52,288 INFO L87 Difference]: Start difference. First operand 1609 states and 2256 transitions. Second operand 7 states. [2020-10-28 18:32:53,302 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:32:57,132 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:32:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:58,466 INFO L93 Difference]: Finished difference Result 3845 states and 5599 transitions. [2020-10-28 18:32:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:32:58,466 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:32:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:58,480 INFO L225 Difference]: With dead ends: 3845 [2020-10-28 18:32:58,481 INFO L226 Difference]: Without dead ends: 3147 [2020-10-28 18:32:58,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:32:58,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2020-10-28 18:32:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 1609. [2020-10-28 18:32:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2020-10-28 18:32:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2255 transitions. [2020-10-28 18:32:58,690 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2255 transitions. Word has length 67 [2020-10-28 18:32:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:58,691 INFO L481 AbstractCegarLoop]: Abstraction has 1609 states and 2255 transitions. [2020-10-28 18:32:58,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:32:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2255 transitions. [2020-10-28 18:32:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:32:58,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:58,693 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] [2020-10-28 18:32:58,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:32:58,694 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:58,694 INFO L82 PathProgramCache]: Analyzing trace with hash -319914876, now seen corresponding path program 1 times [2020-10-28 18:32:58,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:58,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598964513] [2020-10-28 18:32:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:58,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:58,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:58,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:58,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:59,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:59,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:59,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:00,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:00,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:01,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:01,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:02,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:02,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:02,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:03,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:03,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:03,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:33:03,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:33:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:33:03,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:03,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:33:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:33:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:04,699 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:33:04,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:04,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:04,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:04,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:04,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:04,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:33:04,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:04,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:33:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:33:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:04,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598964513] [2020-10-28 18:33:04,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:33:04,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:33:04,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028571213] [2020-10-28 18:33:04,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:33:04,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:33:04,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:33:04,744 INFO L87 Difference]: Start difference. First operand 1609 states and 2255 transitions. Second operand 8 states. [2020-10-28 18:33:05,731 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:33:10,163 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:33:11,213 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:33:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:33:13,062 INFO L93 Difference]: Finished difference Result 6034 states and 8896 transitions. [2020-10-28 18:33:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:33:13,065 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:33:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:33:13,088 INFO L225 Difference]: With dead ends: 6034 [2020-10-28 18:33:13,088 INFO L226 Difference]: Without dead ends: 5096 [2020-10-28 18:33:13,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:33:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2020-10-28 18:33:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 3685. [2020-10-28 18:33:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3685 states. [2020-10-28 18:33:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3685 states to 3685 states and 5351 transitions. [2020-10-28 18:33:13,548 INFO L78 Accepts]: Start accepts. Automaton has 3685 states and 5351 transitions. Word has length 67 [2020-10-28 18:33:13,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:33:13,548 INFO L481 AbstractCegarLoop]: Abstraction has 3685 states and 5351 transitions. [2020-10-28 18:33:13,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:33:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3685 states and 5351 transitions. [2020-10-28 18:33:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:33:13,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:33:13,551 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] [2020-10-28 18:33:13,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:33:13,552 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:33:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:33:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1795259119, now seen corresponding path program 1 times [2020-10-28 18:33:13,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:33:13,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478638642] [2020-10-28 18:33:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:33:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:13,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:13,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:13,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:13,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:14,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:14,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:14,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:14,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:15,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:16,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:16,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:16,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:16,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:17,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:18,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:18,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:33:18,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:33:18,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:33:18,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:18,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:33:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 18:33:18,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:19,593 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:33:19,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:19,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:19,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:19,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:19,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:19,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:33:19,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:19,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:33:19,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:19,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:33:19,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:19,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478638642] [2020-10-28 18:33:19,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:33:19,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:33:19,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245810132] [2020-10-28 18:33:19,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:33:19,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:19,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:33:19,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:33:19,658 INFO L87 Difference]: Start difference. First operand 3685 states and 5351 transitions. Second operand 8 states. [2020-10-28 18:33:20,699 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:33:24,536 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:33:25,569 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:33:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:33:27,546 INFO L93 Difference]: Finished difference Result 5102 states and 7424 transitions. [2020-10-28 18:33:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:33:27,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:33:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:33:27,568 INFO L225 Difference]: With dead ends: 5102 [2020-10-28 18:33:27,568 INFO L226 Difference]: Without dead ends: 5095 [2020-10-28 18:33:27,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:33:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2020-10-28 18:33:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 3685. [2020-10-28 18:33:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3685 states. [2020-10-28 18:33:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3685 states to 3685 states and 5348 transitions. [2020-10-28 18:33:28,009 INFO L78 Accepts]: Start accepts. Automaton has 3685 states and 5348 transitions. Word has length 67 [2020-10-28 18:33:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:33:28,010 INFO L481 AbstractCegarLoop]: Abstraction has 3685 states and 5348 transitions. [2020-10-28 18:33:28,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:33:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3685 states and 5348 transitions. [2020-10-28 18:33:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:33:28,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:33:28,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:33:28,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:33:28,013 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:33:28,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:33:28,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1003061388, now seen corresponding path program 1 times [2020-10-28 18:33:28,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:33:28,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071820323] [2020-10-28 18:33:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:33:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:28,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:28,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:28,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:28,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:28,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:28,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:32,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:32,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:32,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:33,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:33,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:33:33,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:33:33,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:33:33,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:33,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:33,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:33:33,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:33,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:33:33,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:34,140 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:33:34,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:34,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:34,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:34,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:34,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:34,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:33:34,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:34,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:34,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:33:34,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:33:34,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:34,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071820323] [2020-10-28 18:33:34,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:33:34,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:33:34,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589558810] [2020-10-28 18:33:34,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:33:34,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:33:34,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:33:34,192 INFO L87 Difference]: Start difference. First operand 3685 states and 5348 transitions. Second operand 7 states. [2020-10-28 18:33:35,196 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:33:38,836 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:33:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:33:40,608 INFO L93 Difference]: Finished difference Result 8364 states and 12479 transitions. [2020-10-28 18:33:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:33:40,609 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:33:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:33:40,626 INFO L225 Difference]: With dead ends: 8364 [2020-10-28 18:33:40,626 INFO L226 Difference]: Without dead ends: 6486 [2020-10-28 18:33:40,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:33:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6486 states. [2020-10-28 18:33:41,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6486 to 3660. [2020-10-28 18:33:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3660 states. [2020-10-28 18:33:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3660 states to 3660 states and 5319 transitions. [2020-10-28 18:33:41,035 INFO L78 Accepts]: Start accepts. Automaton has 3660 states and 5319 transitions. Word has length 67 [2020-10-28 18:33:41,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:33:41,036 INFO L481 AbstractCegarLoop]: Abstraction has 3660 states and 5319 transitions. [2020-10-28 18:33:41,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:33:41,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3660 states and 5319 transitions. [2020-10-28 18:33:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:33:41,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:33:41,039 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] [2020-10-28 18:33:41,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:33:41,039 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:33:41,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:33:41,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1149271481, now seen corresponding path program 1 times [2020-10-28 18:33:41,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:33:41,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556841217] [2020-10-28 18:33:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:33:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:41,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:41,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:41,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:41,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:41,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:42,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:42,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:44,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:44,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:44,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:44,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:46,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:46,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:33:46,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:33:46,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:33:46,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:46,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:46,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:33:46,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:46,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:33:46,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:47,032 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:33:47,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:47,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:47,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:47,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:47,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:47,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:33:47,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:47,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:47,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:33:47,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:47,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:33:47,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:47,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556841217] [2020-10-28 18:33:47,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:33:47,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:33:47,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201940574] [2020-10-28 18:33:47,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:33:47,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:47,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:33:47,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:33:47,074 INFO L87 Difference]: Start difference. First operand 3660 states and 5319 transitions. Second operand 7 states. [2020-10-28 18:33:48,006 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:33:51,779 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:33:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:33:53,599 INFO L93 Difference]: Finished difference Result 8273 states and 12305 transitions. [2020-10-28 18:33:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:33:53,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-28 18:33:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:33:53,612 INFO L225 Difference]: With dead ends: 8273 [2020-10-28 18:33:53,613 INFO L226 Difference]: Without dead ends: 6949 [2020-10-28 18:33:53,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:33:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6949 states. [2020-10-28 18:33:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6949 to 3608. [2020-10-28 18:33:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3608 states. [2020-10-28 18:33:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3608 states to 3608 states and 5257 transitions. [2020-10-28 18:33:54,152 INFO L78 Accepts]: Start accepts. Automaton has 3608 states and 5257 transitions. Word has length 67 [2020-10-28 18:33:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:33:54,152 INFO L481 AbstractCegarLoop]: Abstraction has 3608 states and 5257 transitions. [2020-10-28 18:33:54,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:33:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3608 states and 5257 transitions. [2020-10-28 18:33:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:33:54,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:33:54,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:33:54,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:33:54,155 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:33:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:33:54,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1273772413, now seen corresponding path program 1 times [2020-10-28 18:33:54,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:33:54,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189822000] [2020-10-28 18:33:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:33:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:54,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:54,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:54,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:54,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:55,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:56,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:56,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:56,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:56,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:56,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:57,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:57,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:57,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:58,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:59,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:59,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:33:59,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:33:59,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:33:59,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:59,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:59,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:33:59,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:59,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:33:59,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:00,192 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:34:00,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:00,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:00,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:00,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:00,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:00,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:34:00,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:00,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:00,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:00,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:00,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:00,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:00,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189822000] [2020-10-28 18:34:00,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:00,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:34:00,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520767102] [2020-10-28 18:34:00,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:34:00,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:00,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:34:00,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:34:00,249 INFO L87 Difference]: Start difference. First operand 3608 states and 5257 transitions. Second operand 8 states. [2020-10-28 18:34:01,239 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:34:05,274 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:34:06,312 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:34:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:34:08,240 INFO L93 Difference]: Finished difference Result 5018 states and 7323 transitions. [2020-10-28 18:34:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:34:08,241 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:34:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:34:08,250 INFO L225 Difference]: With dead ends: 5018 [2020-10-28 18:34:08,251 INFO L226 Difference]: Without dead ends: 5008 [2020-10-28 18:34:08,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:34:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5008 states. [2020-10-28 18:34:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5008 to 3608. [2020-10-28 18:34:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3608 states. [2020-10-28 18:34:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3608 states to 3608 states and 5256 transitions. [2020-10-28 18:34:08,751 INFO L78 Accepts]: Start accepts. Automaton has 3608 states and 5256 transitions. Word has length 67 [2020-10-28 18:34:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:34:08,752 INFO L481 AbstractCegarLoop]: Abstraction has 3608 states and 5256 transitions. [2020-10-28 18:34:08,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:34:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3608 states and 5256 transitions. [2020-10-28 18:34:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:34:08,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:34:08,754 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] [2020-10-28 18:34:08,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:34:08,754 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:34:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:34:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash -64545893, now seen corresponding path program 1 times [2020-10-28 18:34:08,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:34:08,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590380200] [2020-10-28 18:34:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:34:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:08,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:08,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:08,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:09,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:09,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:09,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:10,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:10,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:10,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:11,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:11,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:12,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:13,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:13,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:34:13,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:34:13,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:34:13,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:13,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:13,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:34:13,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:34:13,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:34:13,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:14,814 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:34:14,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:34:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:34:14,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:34:14,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:34:14,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:34:14,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:34:14,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:34:14,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:34:14,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:34:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:34:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:34:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:34:14,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:34:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:34:14,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590380200] [2020-10-28 18:34:14,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:34:14,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:34:14,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297839551] [2020-10-28 18:34:14,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:34:14,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:34:14,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:34:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:34:14,865 INFO L87 Difference]: Start difference. First operand 3608 states and 5256 transitions. Second operand 8 states. [2020-10-28 18:34:15,849 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 352