/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:44:36,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:44:36,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:44:37,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:44:37,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:44:37,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:44:37,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:44:37,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:44:37,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:44:37,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:44:37,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:44:37,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:44:37,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:44:37,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:44:37,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:44:37,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:44:37,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:44:37,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:44:37,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:44:37,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:44:37,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:44:37,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:44:37,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:44:37,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:44:37,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:44:37,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:44:37,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:44:37,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:44:37,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:44:37,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:44:37,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:44:37,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:44:37,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:44:37,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:44:37,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:44:37,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:44:37,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:44:37,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:44:37,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:44:37,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:44:37,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:44:37,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:44:37,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:44:37,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:44:37,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:44:37,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:44:37,122 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:44:37,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:44:37,122 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:44:37,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:44:37,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:44:37,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:44:37,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:44:37,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:44:37,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:44:37,124 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:44:37,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:44:37,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:44:37,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:44:37,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:44:37,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:44:37,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:44:37,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:44:37,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:44:37,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:44:37,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:44:37,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:44:37,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:44:37,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:44:37,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:44:37,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:44:37,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:44:37,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:44:37,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:44:37,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:44:37,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:44:37,595 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:44:37,596 INFO L432 ainManager$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.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:44:37,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e9f6d272/f478789e462340f5b17837315decb1f4/FLAGa9ffd79c7 [2020-10-27 23:44:38,338 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:44:38,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:44:38,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e9f6d272/f478789e462340f5b17837315decb1f4/FLAGa9ffd79c7 [2020-10-27 23:44:38,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e9f6d272/f478789e462340f5b17837315decb1f4 [2020-10-27 23:44:38,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:44:38,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:44:38,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:44:38,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:44:38,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:44:38,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:38" (1/1) ... [2020-10-27 23:44:38,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d518251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:38, skipping insertion in model container [2020-10-27 23:44:38,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:38" (1/1) ... [2020-10-27 23:44:38,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:44:38,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:44:38,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:44:38,975 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:44:39,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:44:39,069 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:44:39,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39 WrapperNode [2020-10-27 23:44:39,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:44:39,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:44:39,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:44:39,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:44:39,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39" (1/1) ... [2020-10-27 23:44:39,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39" (1/1) ... [2020-10-27 23:44:39,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39" (1/1) ... [2020-10-27 23:44:39,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39" (1/1) ... [2020-10-27 23:44:39,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39" (1/1) ... [2020-10-27 23:44:39,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39" (1/1) ... [2020-10-27 23:44:39,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39" (1/1) ... [2020-10-27 23:44:39,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:44:39,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:44:39,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:44:39,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:44:39,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:44:39,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:44:39,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:44:39,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:44:39,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:44:39,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:44:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:44:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:44:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:44:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:44:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:44:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:44:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:44:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:44:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:44:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:44:39,252 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:44:39,252 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:44:39,252 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:44:39,252 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:44:39,252 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:44:39,253 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:44:39,253 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:44:39,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:44:39,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:44:39,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:44:39,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:44:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:44:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:44:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:44:39,861 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:44:39,861 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:44:39,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:39 BoogieIcfgContainer [2020-10-27 23:44:39,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:44:39,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:44:39,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:44:39,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:44:39,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:44:38" (1/3) ... [2020-10-27 23:44:39,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@982156f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:39, skipping insertion in model container [2020-10-27 23:44:39,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:39" (2/3) ... [2020-10-27 23:44:39,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@982156f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:39, skipping insertion in model container [2020-10-27 23:44:39,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:39" (3/3) ... [2020-10-27 23:44:39,874 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:44:39,888 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:44:39,893 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:44:39,908 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:44:39,938 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:44:39,939 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:44:39,939 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:44:39,939 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:44:39,939 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:44:39,939 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:44:39,940 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:44:39,940 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:44:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2020-10-27 23:44:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:44:39,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:39,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:39,972 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1579954712, now seen corresponding path program 1 times [2020-10-27 23:44:39,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:39,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760074086] [2020-10-27 23:44:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:40,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:45,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:45,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:44:45,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:44:45,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:44:45,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:44:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:44:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:44:45,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:44:45,583 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:44:45,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:45,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:45,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:45,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:45,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:45,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:44:45,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:45,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:45,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:45,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:45,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:45,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760074086] [2020-10-27 23:44:45,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:45,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:44:45,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616481809] [2020-10-27 23:44:45,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:44:45,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:44:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:44:45,700 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 4 states. [2020-10-27 23:44:45,954 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:44:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:46,406 INFO L93 Difference]: Finished difference Result 196 states and 307 transitions. [2020-10-27 23:44:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:44:46,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-27 23:44:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:46,419 INFO L225 Difference]: With dead ends: 196 [2020-10-27 23:44:46,420 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 23:44:46,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:44:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 23:44:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-10-27 23:44:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 23:44:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 180 transitions. [2020-10-27 23:44:46,493 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 180 transitions. Word has length 53 [2020-10-27 23:44:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:46,494 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 180 transitions. [2020-10-27 23:44:46,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:44:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 180 transitions. [2020-10-27 23:44:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:44:46,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:46,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:46,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:44:46,498 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:46,499 INFO L82 PathProgramCache]: Analyzing trace with hash 74551991, now seen corresponding path program 1 times [2020-10-27 23:44:46,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:46,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191913274] [2020-10-27 23:44:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:46,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:46,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:46,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:46,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:51,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:51,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:44:51,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:44:51,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:44:51,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:44:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:44:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:44:51,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-27 23:44:51,824 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:44:51,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:51,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:51,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:51,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:51,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:51,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:44:51,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:51,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:51,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:51,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:51,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:51,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191913274] [2020-10-27 23:44:51,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:51,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:44:51,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145446109] [2020-10-27 23:44:51,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:44:51,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:44:51,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:44:51,901 INFO L87 Difference]: Start difference. First operand 125 states and 180 transitions. Second operand 4 states. [2020-10-27 23:44:52,118 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:44:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:52,605 INFO L93 Difference]: Finished difference Result 299 states and 454 transitions. [2020-10-27 23:44:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:44:52,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-27 23:44:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:52,613 INFO L225 Difference]: With dead ends: 299 [2020-10-27 23:44:52,613 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 23:44:52,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:44:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 23:44:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2020-10-27 23:44:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 23:44:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 300 transitions. [2020-10-27 23:44:52,689 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 300 transitions. Word has length 54 [2020-10-27 23:44:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:52,689 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 300 transitions. [2020-10-27 23:44:52,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:44:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 300 transitions. [2020-10-27 23:44:52,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:44:52,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:52,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:52,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:44:52,693 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash -751884305, now seen corresponding path program 1 times [2020-10-27 23:44:52,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:52,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145967762] [2020-10-27 23:44:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:52,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:53,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:54,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:54,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:54,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:57,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:57,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:57,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:44:57,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:44:57,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:57,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:44:57,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:44:57,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:44:57,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:44:58,022 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:44:58,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:58,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:58,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:58,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:58,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:44:58,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:58,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:58,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145967762] [2020-10-27 23:44:58,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:58,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:44:58,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419178142] [2020-10-27 23:44:58,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:44:58,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:44:58,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:44:58,076 INFO L87 Difference]: Start difference. First operand 201 states and 300 transitions. Second operand 7 states. [2020-10-27 23:44:58,312 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:44:58,821 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:44:59,006 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:44:59,448 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:44:59,663 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:45:00,062 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:45:00,262 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:00,640 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 23:45:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:00,700 INFO L93 Difference]: Finished difference Result 1563 states and 2448 transitions. [2020-10-27 23:45:00,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:00,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 23:45:00,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:00,710 INFO L225 Difference]: With dead ends: 1563 [2020-10-27 23:45:00,710 INFO L226 Difference]: Without dead ends: 1392 [2020-10-27 23:45:00,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2020-10-27 23:45:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 533. [2020-10-27 23:45:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-27 23:45:00,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 826 transitions. [2020-10-27 23:45:00,793 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 826 transitions. Word has length 55 [2020-10-27 23:45:00,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:00,796 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 826 transitions. [2020-10-27 23:45:00,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 826 transitions. [2020-10-27 23:45:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:45:00,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:00,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:00,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:45:00,812 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:00,812 INFO L82 PathProgramCache]: Analyzing trace with hash 83318186, now seen corresponding path program 1 times [2020-10-27 23:45:00,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:00,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079034255] [2020-10-27 23:45:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:00,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:00,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:00,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:01,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:01,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:05,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:05,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:45:05,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:45:05,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:45:05,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:05,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:45:05,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:45:05,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:45:05,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:06,081 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:06,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:06,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:06,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:06,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:06,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 23:45:06,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:06,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:06,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:06,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:06,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:06,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079034255] [2020-10-27 23:45:06,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:06,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:45:06,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949695586] [2020-10-27 23:45:06,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:45:06,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:06,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:45:06,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:45:06,147 INFO L87 Difference]: Start difference. First operand 533 states and 826 transitions. Second operand 4 states. [2020-10-27 23:45:06,368 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:06,782 INFO L93 Difference]: Finished difference Result 1443 states and 2262 transitions. [2020-10-27 23:45:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:45:06,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-27 23:45:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:06,788 INFO L225 Difference]: With dead ends: 1443 [2020-10-27 23:45:06,789 INFO L226 Difference]: Without dead ends: 940 [2020-10-27 23:45:06,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:45:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2020-10-27 23:45:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 937. [2020-10-27 23:45:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2020-10-27 23:45:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1452 transitions. [2020-10-27 23:45:06,861 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1452 transitions. Word has length 55 [2020-10-27 23:45:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:06,861 INFO L481 AbstractCegarLoop]: Abstraction has 937 states and 1452 transitions. [2020-10-27 23:45:06,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:45:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1452 transitions. [2020-10-27 23:45:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:45:06,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:06,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:06,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:45:06,863 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:06,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:06,863 INFO L82 PathProgramCache]: Analyzing trace with hash 671732378, now seen corresponding path program 1 times [2020-10-27 23:45:06,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:06,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254941842] [2020-10-27 23:45:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:06,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:07,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:10,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:10,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:45:10,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:45:10,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3847 [2020-10-27 23:45:10,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:45:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:45:10,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:10,983 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:10,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:11,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:11,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:11,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:11,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:45:11,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:11,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:11,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:11,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:11,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:11,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254941842] [2020-10-27 23:45:11,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:11,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:11,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398591982] [2020-10-27 23:45:11,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:11,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:11,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:11,028 INFO L87 Difference]: Start difference. First operand 937 states and 1452 transitions. Second operand 7 states. [2020-10-27 23:45:11,296 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:11,858 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:45:12,081 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:12,298 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:45:12,833 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:45:13,038 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:13,458 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:45:13,847 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 23:45:13,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:13,894 INFO L93 Difference]: Finished difference Result 6400 states and 9992 transitions. [2020-10-27 23:45:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:13,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 23:45:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:13,924 INFO L225 Difference]: With dead ends: 6400 [2020-10-27 23:45:13,924 INFO L226 Difference]: Without dead ends: 5793 [2020-10-27 23:45:13,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2020-10-27 23:45:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 1860. [2020-10-27 23:45:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-10-27 23:45:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2880 transitions. [2020-10-27 23:45:14,131 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2880 transitions. Word has length 56 [2020-10-27 23:45:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:14,131 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2880 transitions. [2020-10-27 23:45:14,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2880 transitions. [2020-10-27 23:45:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:45:14,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:14,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:14,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:45:14,133 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:14,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1431841788, now seen corresponding path program 1 times [2020-10-27 23:45:14,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:14,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586136211] [2020-10-27 23:45:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:14,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:14,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:14,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:17,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:17,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:45:17,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:45:17,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2935 [2020-10-27 23:45:17,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:45:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:45:17,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:17,367 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:17,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:17,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:17,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:17,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:17,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:17,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:45:17,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:17,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:17,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:45:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:17,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586136211] [2020-10-27 23:45:17,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:17,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:17,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564857468] [2020-10-27 23:45:17,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:17,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:17,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:17,418 INFO L87 Difference]: Start difference. First operand 1860 states and 2880 transitions. Second operand 7 states. [2020-10-27 23:45:17,778 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:18,333 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:45:18,565 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:18,792 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:45:19,380 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:45:19,590 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:20,021 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:45:20,436 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 23:45:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:20,497 INFO L93 Difference]: Finished difference Result 7564 states and 11716 transitions. [2020-10-27 23:45:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:20,498 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 23:45:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:20,539 INFO L225 Difference]: With dead ends: 7564 [2020-10-27 23:45:20,539 INFO L226 Difference]: Without dead ends: 6361 [2020-10-27 23:45:20,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2020-10-27 23:45:20,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 2456. [2020-10-27 23:45:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2020-10-27 23:45:20,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3812 transitions. [2020-10-27 23:45:20,789 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3812 transitions. Word has length 56 [2020-10-27 23:45:20,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:20,789 INFO L481 AbstractCegarLoop]: Abstraction has 2456 states and 3812 transitions. [2020-10-27 23:45:20,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3812 transitions. [2020-10-27 23:45:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:45:20,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:20,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:20,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:45:20,792 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -596639297, now seen corresponding path program 1 times [2020-10-27 23:45:20,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:20,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198272746] [2020-10-27 23:45:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:20,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:21,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:45:21,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:45:21,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-27 23:45:21,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:45:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:45:21,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:21,654 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:21,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:21,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:21,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:21,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:21,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:45:21,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:21,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:21,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198272746] [2020-10-27 23:45:21,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:21,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:21,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020177365] [2020-10-27 23:45:21,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:21,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:21,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:21,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:21,697 INFO L87 Difference]: Start difference. First operand 2456 states and 3812 transitions. Second operand 7 states. [2020-10-27 23:45:21,953 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 23:45:22,468 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:45:23,073 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:45:23,302 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:23,516 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:45:23,854 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:45:24,085 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:24,765 INFO L93 Difference]: Finished difference Result 21626 states and 33729 transitions. [2020-10-27 23:45:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:45:24,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 23:45:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:24,849 INFO L225 Difference]: With dead ends: 21626 [2020-10-27 23:45:24,849 INFO L226 Difference]: Without dead ends: 19231 [2020-10-27 23:45:24,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:45:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19231 states. [2020-10-27 23:45:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19231 to 4858. [2020-10-27 23:45:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4858 states. [2020-10-27 23:45:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4858 states to 4858 states and 7433 transitions. [2020-10-27 23:45:25,520 INFO L78 Accepts]: Start accepts. Automaton has 4858 states and 7433 transitions. Word has length 56 [2020-10-27 23:45:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:25,522 INFO L481 AbstractCegarLoop]: Abstraction has 4858 states and 7433 transitions. [2020-10-27 23:45:25,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4858 states and 7433 transitions. [2020-10-27 23:45:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 23:45:25,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:25,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:25,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:45:25,524 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:25,524 INFO L82 PathProgramCache]: Analyzing trace with hash 231563492, now seen corresponding path program 1 times [2020-10-27 23:45:25,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:25,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824108062] [2020-10-27 23:45:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:25,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:25,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:25,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:25,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:26,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:26,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 23:45:26,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:45:26,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-27 23:45:26,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:26,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:45:26,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 23:45:26,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:45:26,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:26,379 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:26,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:26,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:26,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:26,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:26,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:26,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:45:26,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:26,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:26,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824108062] [2020-10-27 23:45:26,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:26,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:45:26,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605879053] [2020-10-27 23:45:26,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:45:26,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:45:26,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:45:26,421 INFO L87 Difference]: Start difference. First operand 4858 states and 7433 transitions. Second operand 5 states. [2020-10-27 23:45:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:27,645 INFO L93 Difference]: Finished difference Result 9901 states and 15035 transitions. [2020-10-27 23:45:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:45:27,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-27 23:45:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:27,669 INFO L225 Difference]: With dead ends: 9901 [2020-10-27 23:45:27,670 INFO L226 Difference]: Without dead ends: 9898 [2020-10-27 23:45:27,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:45:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9898 states. [2020-10-27 23:45:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9898 to 5114. [2020-10-27 23:45:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5114 states. [2020-10-27 23:45:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7689 transitions. [2020-10-27 23:45:28,252 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7689 transitions. Word has length 58 [2020-10-27 23:45:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:28,253 INFO L481 AbstractCegarLoop]: Abstraction has 5114 states and 7689 transitions. [2020-10-27 23:45:28,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:45:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7689 transitions. [2020-10-27 23:45:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 23:45:28,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:28,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:28,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:45:28,255 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash 853093125, now seen corresponding path program 1 times [2020-10-27 23:45:28,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:28,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30119765] [2020-10-27 23:45:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:28,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:29,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 23:45:29,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:45:29,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 866 [2020-10-27 23:45:29,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:45:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 23:45:29,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:29,434 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:29,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:29,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:29,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:29,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:29,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:45:29,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:29,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:29,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:29,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30119765] [2020-10-27 23:45:29,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:29,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:29,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215409389] [2020-10-27 23:45:29,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:29,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:29,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:29,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:29,477 INFO L87 Difference]: Start difference. First operand 5114 states and 7689 transitions. Second operand 7 states. [2020-10-27 23:45:29,774 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:45:30,360 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:30,989 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:31,216 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:45:31,435 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:45:31,844 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:32,065 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:45:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:33,216 INFO L93 Difference]: Finished difference Result 25298 states and 38105 transitions. [2020-10-27 23:45:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:45:33,217 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-27 23:45:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:33,269 INFO L225 Difference]: With dead ends: 25298 [2020-10-27 23:45:33,270 INFO L226 Difference]: Without dead ends: 20255 [2020-10-27 23:45:33,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:45:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20255 states. [2020-10-27 23:45:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20255 to 5114. [2020-10-27 23:45:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5114 states. [2020-10-27 23:45:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7625 transitions. [2020-10-27 23:45:34,067 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7625 transitions. Word has length 58 [2020-10-27 23:45:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:34,068 INFO L481 AbstractCegarLoop]: Abstraction has 5114 states and 7625 transitions. [2020-10-27 23:45:34,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7625 transitions. [2020-10-27 23:45:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 23:45:34,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:34,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:34,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:45:34,069 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:34,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1967732943, now seen corresponding path program 1 times [2020-10-27 23:45:34,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:34,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594427660] [2020-10-27 23:45:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:34,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:34,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:34,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:34,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:34,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:39,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 23:45:39,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:45:39,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:45:39,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:45:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:45:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 23:45:39,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:39,317 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:39,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:39,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:39,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:39,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:45:39,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:39,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:39,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:39,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:39,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:39,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594427660] [2020-10-27 23:45:39,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:39,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:45:39,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733435588] [2020-10-27 23:45:39,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:45:39,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:45:39,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:45:39,356 INFO L87 Difference]: Start difference. First operand 5114 states and 7625 transitions. Second operand 5 states. [2020-10-27 23:45:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:40,798 INFO L93 Difference]: Finished difference Result 15560 states and 22902 transitions. [2020-10-27 23:45:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:45:40,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-27 23:45:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:40,835 INFO L225 Difference]: With dead ends: 15560 [2020-10-27 23:45:40,835 INFO L226 Difference]: Without dead ends: 10495 [2020-10-27 23:45:40,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:45:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2020-10-27 23:45:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 5092. [2020-10-27 23:45:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5092 states. [2020-10-27 23:45:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 7594 transitions. [2020-10-27 23:45:41,472 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 7594 transitions. Word has length 59 [2020-10-27 23:45:41,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:41,472 INFO L481 AbstractCegarLoop]: Abstraction has 5092 states and 7594 transitions. [2020-10-27 23:45:41,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:45:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 7594 transitions. [2020-10-27 23:45:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 23:45:41,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:41,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:41,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:45:41,474 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:41,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:41,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1113395853, now seen corresponding path program 1 times [2020-10-27 23:45:41,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:41,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106949551] [2020-10-27 23:45:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:41,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:41,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:41,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:41,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:41,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 23:45:41,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:45:41,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-27 23:45:41,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:41,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:45:41,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:45:41,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:45:41,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:42,050 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:42,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:42,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:42,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:42,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:42,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:45:42,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:42,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:42,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:45:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:42,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106949551] [2020-10-27 23:45:42,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:42,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:45:42,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860143551] [2020-10-27 23:45:42,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:45:42,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:42,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:45:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:45:42,095 INFO L87 Difference]: Start difference. First operand 5092 states and 7594 transitions. Second operand 4 states. [2020-10-27 23:45:42,323 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:43,688 INFO L93 Difference]: Finished difference Result 14239 states and 21161 transitions. [2020-10-27 23:45:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:45:43,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-27 23:45:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:43,709 INFO L225 Difference]: With dead ends: 14239 [2020-10-27 23:45:43,709 INFO L226 Difference]: Without dead ends: 9184 [2020-10-27 23:45:43,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:45:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9184 states. [2020-10-27 23:45:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9184 to 9053. [2020-10-27 23:45:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9053 states. [2020-10-27 23:45:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9053 states to 9053 states and 13157 transitions. [2020-10-27 23:45:44,810 INFO L78 Accepts]: Start accepts. Automaton has 9053 states and 13157 transitions. Word has length 59 [2020-10-27 23:45:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:44,810 INFO L481 AbstractCegarLoop]: Abstraction has 9053 states and 13157 transitions. [2020-10-27 23:45:44,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:45:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 9053 states and 13157 transitions. [2020-10-27 23:45:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:45:44,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:44,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:44,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:45:44,811 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1203130144, now seen corresponding path program 1 times [2020-10-27 23:45:44,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:44,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464975932] [2020-10-27 23:45:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:44,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:44,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:44,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:44,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:45,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:45,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:45:45,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:45:45,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-27 23:45:45,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:45,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:45:45,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:45:45,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:45:45,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:46,009 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:46,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:46,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:46,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:46,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:46,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:46,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:45:46,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:46,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:46,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:46,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:46,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:46,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464975932] [2020-10-27 23:45:46,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:46,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:45:46,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103160620] [2020-10-27 23:45:46,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:45:46,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:45:46,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:45:46,043 INFO L87 Difference]: Start difference. First operand 9053 states and 13157 transitions. Second operand 4 states. [2020-10-27 23:45:46,264 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:45:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:47,851 INFO L93 Difference]: Finished difference Result 17859 states and 26185 transitions. [2020-10-27 23:45:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:45:47,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 23:45:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:47,874 INFO L225 Difference]: With dead ends: 17859 [2020-10-27 23:45:47,875 INFO L226 Difference]: Without dead ends: 12803 [2020-10-27 23:45:47,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:45:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12803 states. [2020-10-27 23:45:49,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12803 to 12800. [2020-10-27 23:45:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12800 states. [2020-10-27 23:45:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 18500 transitions. [2020-10-27 23:45:49,259 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 18500 transitions. Word has length 60 [2020-10-27 23:45:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:49,260 INFO L481 AbstractCegarLoop]: Abstraction has 12800 states and 18500 transitions. [2020-10-27 23:45:49,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:45:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 18500 transitions. [2020-10-27 23:45:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 23:45:49,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:49,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:49,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:45:49,268 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:49,269 INFO L82 PathProgramCache]: Analyzing trace with hash 835141509, now seen corresponding path program 1 times [2020-10-27 23:45:49,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:49,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934856054] [2020-10-27 23:45:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:49,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:50,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:50,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:50,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:51,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:54,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:54,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 23:45:54,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:45:54,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:45:54,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:45:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 23:45:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:45:54,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:54,551 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:45:54,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:54,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:54,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:54,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:54,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:54,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:45:54,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:54,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:54,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:54,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934856054] [2020-10-27 23:45:54,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:54,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:45:54,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145258227] [2020-10-27 23:45:54,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:45:54,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:54,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:45:54,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:45:54,602 INFO L87 Difference]: Start difference. First operand 12800 states and 18500 transitions. Second operand 4 states. [2020-10-27 23:45:55,710 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:45:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:56,033 INFO L93 Difference]: Finished difference Result 21672 states and 31476 transitions. [2020-10-27 23:45:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:45:56,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 23:45:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:56,050 INFO L225 Difference]: With dead ends: 21672 [2020-10-27 23:45:56,050 INFO L226 Difference]: Without dead ends: 8917 [2020-10-27 23:45:56,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:45:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8917 states. [2020-10-27 23:45:57,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8917 to 8914. [2020-10-27 23:45:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8914 states. [2020-10-27 23:45:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8914 states to 8914 states and 12893 transitions. [2020-10-27 23:45:57,149 INFO L78 Accepts]: Start accepts. Automaton has 8914 states and 12893 transitions. Word has length 82 [2020-10-27 23:45:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:57,149 INFO L481 AbstractCegarLoop]: Abstraction has 8914 states and 12893 transitions. [2020-10-27 23:45:57,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:45:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8914 states and 12893 transitions. [2020-10-27 23:45:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:45:57,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:57,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:57,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:45:57,153 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1723777507, now seen corresponding path program 1 times [2020-10-27 23:45:57,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:57,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430725322] [2020-10-27 23:45:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:57,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:57,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:57,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:57,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:57,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:57,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:01,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:02,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:02,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:02,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:46:02,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:46:02,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:46:02,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 23:46:02,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:02,411 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:02,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:02,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:02,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:02,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:02,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:02,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:46:02,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:02,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:02,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:02,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:02,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:02,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430725322] [2020-10-27 23:46:02,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:46:02,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:46:02,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895277548] [2020-10-27 23:46:02,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:02,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:02,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:02,448 INFO L87 Difference]: Start difference. First operand 8914 states and 12893 transitions. Second operand 6 states. [2020-10-27 23:46:02,672 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:46:03,798 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:46:04,055 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:46:06,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:06,318 INFO L93 Difference]: Finished difference Result 30317 states and 43765 transitions. [2020-10-27 23:46:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:46:06,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 23:46:06,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:06,354 INFO L225 Difference]: With dead ends: 30317 [2020-10-27 23:46:06,354 INFO L226 Difference]: Without dead ends: 25898 [2020-10-27 23:46:06,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:46:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25898 states. [2020-10-27 23:46:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25898 to 21983. [2020-10-27 23:46:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21983 states. [2020-10-27 23:46:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21983 states to 21983 states and 31595 transitions. [2020-10-27 23:46:08,726 INFO L78 Accepts]: Start accepts. Automaton has 21983 states and 31595 transitions. Word has length 83 [2020-10-27 23:46:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:08,726 INFO L481 AbstractCegarLoop]: Abstraction has 21983 states and 31595 transitions. [2020-10-27 23:46:08,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:46:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 21983 states and 31595 transitions. [2020-10-27 23:46:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:46:08,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:08,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:08,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:46:08,734 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash 276830801, now seen corresponding path program 1 times [2020-10-27 23:46:08,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:08,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728467094] [2020-10-27 23:46:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:08,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:08,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:08,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:09,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:09,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:09,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:10,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:10,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:13,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:46:13,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:46:13,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:46:13,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:13,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:46:13,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:46:13,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 23:46:13,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:14,256 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:14,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:14,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:14,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:14,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:14,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:14,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:46:14,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:14,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:14,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:14,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:14,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:14,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728467094] [2020-10-27 23:46:14,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:46:14,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 23:46:14,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985441447] [2020-10-27 23:46:14,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:46:14,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:14,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:46:14,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:46:14,311 INFO L87 Difference]: Start difference. First operand 21983 states and 31595 transitions. Second operand 12 states. [2020-10-27 23:46:14,622 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 23:46:18,035 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:46:18,342 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:18,651 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 23:46:18,992 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 23:46:19,264 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:46:19,627 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:23,701 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:46:23,945 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:27,542 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-27 23:46:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:29,560 INFO L93 Difference]: Finished difference Result 88332 states and 126225 transitions. [2020-10-27 23:46:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-27 23:46:29,560 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-27 23:46:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:29,665 INFO L225 Difference]: With dead ends: 88332 [2020-10-27 23:46:29,665 INFO L226 Difference]: Without dead ends: 68665 [2020-10-27 23:46:29,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=790, Invalid=4040, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 23:46:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68665 states. [2020-10-27 23:46:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68665 to 35008. [2020-10-27 23:46:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35008 states. [2020-10-27 23:46:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35008 states to 35008 states and 50224 transitions. [2020-10-27 23:46:34,509 INFO L78 Accepts]: Start accepts. Automaton has 35008 states and 50224 transitions. Word has length 83 [2020-10-27 23:46:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:34,510 INFO L481 AbstractCegarLoop]: Abstraction has 35008 states and 50224 transitions. [2020-10-27 23:46:34,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:46:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 35008 states and 50224 transitions. [2020-10-27 23:46:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:46:34,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:34,517 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:34,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:46:34,517 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:34,518 INFO L82 PathProgramCache]: Analyzing trace with hash -346024925, now seen corresponding path program 1 times [2020-10-27 23:46:34,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:34,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162185149] [2020-10-27 23:46:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:34,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:34,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:34,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:38,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:38,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:38,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:39,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:39,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:39,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:39,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:39,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:46:39,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:46:39,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 23:46:39,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:46:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 23:46:39,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:39,995 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:39,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:40,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:40,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:40,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:40,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:40,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:46:40,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:40,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:40,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162185149] [2020-10-27 23:46:40,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:46:40,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 23:46:40,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964136947] [2020-10-27 23:46:40,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:46:40,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:40,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:46:40,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:46:40,039 INFO L87 Difference]: Start difference. First operand 35008 states and 50224 transitions. Second operand 12 states. [2020-10-27 23:46:40,693 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2020-10-27 23:46:41,609 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-10-27 23:46:45,724 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 147 [2020-10-27 23:46:46,115 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:46:46,534 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 23:46:47,130 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 143 [2020-10-27 23:47:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:00,872 INFO L93 Difference]: Finished difference Result 129219 states and 183073 transitions. [2020-10-27 23:47:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-27 23:47:00,873 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-27 23:47:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:01,009 INFO L225 Difference]: With dead ends: 129219 [2020-10-27 23:47:01,009 INFO L226 Difference]: Without dead ends: 94368 [2020-10-27 23:47:01,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=878, Invalid=4524, Unknown=0, NotChecked=0, Total=5402 [2020-10-27 23:47:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94368 states. [2020-10-27 23:47:06,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94368 to 33649. [2020-10-27 23:47:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33649 states. [2020-10-27 23:47:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33649 states to 33649 states and 47960 transitions. [2020-10-27 23:47:06,575 INFO L78 Accepts]: Start accepts. Automaton has 33649 states and 47960 transitions. Word has length 83 [2020-10-27 23:47:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:06,575 INFO L481 AbstractCegarLoop]: Abstraction has 33649 states and 47960 transitions. [2020-10-27 23:47:06,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:47:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 33649 states and 47960 transitions. [2020-10-27 23:47:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:47:06,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:06,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:06,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:47:06,583 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:06,583 INFO L82 PathProgramCache]: Analyzing trace with hash -413673241, now seen corresponding path program 1 times [2020-10-27 23:47:06,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:06,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413597518] [2020-10-27 23:47:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:06,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:07,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:08,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:10,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:10,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:11,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:11,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:47:11,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:47:11,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:47:11,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:11,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:47:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:47:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 23:47:11,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:11,836 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:47:11,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:11,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:11,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:11,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:11,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:11,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:47:11,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:11,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:11,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:11,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:11,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:11,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413597518] [2020-10-27 23:47:11,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:47:11,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:47:11,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012661548] [2020-10-27 23:47:11,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:47:11,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:47:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:11,869 INFO L87 Difference]: Start difference. First operand 33649 states and 47960 transitions. Second operand 6 states. [2020-10-27 23:47:12,084 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:47:13,329 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:47:13,651 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:47:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:23,188 INFO L93 Difference]: Finished difference Result 84203 states and 119846 transitions. [2020-10-27 23:47:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:47:23,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 23:47:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:23,265 INFO L225 Difference]: With dead ends: 84203 [2020-10-27 23:47:23,265 INFO L226 Difference]: Without dead ends: 64040 [2020-10-27 23:47:23,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:47:23,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64040 states. [2020-10-27 23:47:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64040 to 40811. [2020-10-27 23:47:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40811 states. [2020-10-27 23:47:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40811 states to 40811 states and 57982 transitions. [2020-10-27 23:47:29,629 INFO L78 Accepts]: Start accepts. Automaton has 40811 states and 57982 transitions. Word has length 83 [2020-10-27 23:47:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:29,629 INFO L481 AbstractCegarLoop]: Abstraction has 40811 states and 57982 transitions. [2020-10-27 23:47:29,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:47:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40811 states and 57982 transitions. [2020-10-27 23:47:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:47:29,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:29,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:29,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:47:29,637 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1149775123, now seen corresponding path program 1 times [2020-10-27 23:47:29,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:29,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287689688] [2020-10-27 23:47:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:29,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:29,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:29,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:34,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:47:34,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:47:34,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:47:34,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:34,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 23:47:34,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:47:34,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 23:47:34,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:35,074 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-27 23:47:35,434 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:47:35,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:35,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:35,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:35,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:35,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:47:35,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:35,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:35,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:35,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:35,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287689688] [2020-10-27 23:47:35,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:47:35,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 23:47:35,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699896848] [2020-10-27 23:47:35,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 23:47:35,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:35,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 23:47:35,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:47:35,489 INFO L87 Difference]: Start difference. First operand 40811 states and 57982 transitions. Second operand 14 states. [2020-10-27 23:47:35,863 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 23:47:36,698 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-27 23:47:36,845 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-27 23:47:37,169 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-27 23:47:37,550 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-10-27 23:47:38,132 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-27 23:47:38,410 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-27 23:47:38,987 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-27 23:47:39,279 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-27 23:47:39,439 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-27 23:47:39,912 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-10-27 23:47:40,074 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-27 23:47:40,702 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-27 23:47:41,209 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-10-27 23:47:41,580 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-10-27 23:47:42,968 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 23:47:43,355 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:47:43,649 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:47:44,139 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 23:47:45,944 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2020-10-27 23:47:46,099 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 23:47:47,055 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 23:48:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:04,002 INFO L93 Difference]: Finished difference Result 121464 states and 169622 transitions. [2020-10-27 23:48:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 23:48:04,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-27 23:48:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:04,141 INFO L225 Difference]: With dead ends: 121464 [2020-10-27 23:48:04,142 INFO L226 Difference]: Without dead ends: 109455 [2020-10-27 23:48:04,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=614, Invalid=3676, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 23:48:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109455 states.