/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/array-examples/standard_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:19:21,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:19:21,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:19:21,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:19:21,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:19:21,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:19:21,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:19:21,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:19:21,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:19:21,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:19:21,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:19:21,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:19:21,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:19:21,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:19:21,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:19:21,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:19:21,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:19:21,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:19:21,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:19:21,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:19:21,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:19:21,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:19:21,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:19:21,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:19:21,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:19:21,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:19:21,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:19:21,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:19:21,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:19:21,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:19:21,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:19:21,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:19:21,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:19:21,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:19:21,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:19:21,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:19:21,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:19:21,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:19:21,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:19:21,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:19:21,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:19:21,106 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 14:19:21,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:19:21,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:19:21,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:19:21,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:19:21,156 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:19:21,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:19:21,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:19:21,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:19:21,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:19:21,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:19:21,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:19:21,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:19:21,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:19:21,159 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:19:21,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:19:21,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:19:21,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:19:21,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:19:21,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:19:21,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:19:21,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:19:21,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:19:21,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:19:21,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:19:21,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:19:21,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:19:21,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:19:21,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:19:21,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:19:21,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:19:21,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:19:21,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:19:21,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:19:21,653 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:19:21,654 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:19:21,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2020-10-27 14:19:21,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d4813a2b/830bcb073e6e485aac58b6100f5107f0/FLAG480832cda [2020-10-27 14:19:22,389 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:19:22,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2020-10-27 14:19:22,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d4813a2b/830bcb073e6e485aac58b6100f5107f0/FLAG480832cda [2020-10-27 14:19:22,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d4813a2b/830bcb073e6e485aac58b6100f5107f0 [2020-10-27 14:19:22,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:19:22,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:19:22,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:19:22,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:19:22,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:19:22,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:19:22" (1/1) ... [2020-10-27 14:19:22,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b3ea3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:22, skipping insertion in model container [2020-10-27 14:19:22,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:19:22" (1/1) ... [2020-10-27 14:19:22,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:19:22,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:19:23,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:19:23,034 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:19:23,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:19:23,115 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:19:23,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23 WrapperNode [2020-10-27 14:19:23,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:19:23,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:19:23,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:19:23,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:19:23,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23" (1/1) ... [2020-10-27 14:19:23,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23" (1/1) ... [2020-10-27 14:19:23,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23" (1/1) ... [2020-10-27 14:19:23,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23" (1/1) ... [2020-10-27 14:19:23,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23" (1/1) ... [2020-10-27 14:19:23,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23" (1/1) ... [2020-10-27 14:19:23,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23" (1/1) ... [2020-10-27 14:19:23,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:19:23,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:19:23,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:19:23,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:19:23,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23" (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 14:19:23,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:19:23,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:19:23,287 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:19:23,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:19:23,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:19:23,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:19:23,288 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:19:23,288 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:19:23,288 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:19:23,288 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:19:23,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:19:23,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:19:23,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:19:23,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:19:23,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:19:23,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:19:23,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:19:23,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:19:23,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:19:23,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:19:23,806 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:19:23,806 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 14:19:23,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:19:23 BoogieIcfgContainer [2020-10-27 14:19:23,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:19:23,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:19:23,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:19:23,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:19:23,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:19:22" (1/3) ... [2020-10-27 14:19:23,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c991ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:19:23, skipping insertion in model container [2020-10-27 14:19:23,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:23" (2/3) ... [2020-10-27 14:19:23,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c991ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:19:23, skipping insertion in model container [2020-10-27 14:19:23,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:19:23" (3/3) ... [2020-10-27 14:19:23,825 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2020-10-27 14:19:23,840 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:19:23,846 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:19:23,865 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:19:23,910 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:19:23,910 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:19:23,910 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:19:23,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:19:23,911 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:19:23,911 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:19:23,911 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:19:23,912 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:19:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-27 14:19:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:19:23,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:23,950 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] [2020-10-27 14:19:23,950 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:23,961 INFO L82 PathProgramCache]: Analyzing trace with hash -706380544, now seen corresponding path program 1 times [2020-10-27 14:19:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:23,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016596466] [2020-10-27 14:19:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:24,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:25,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:26,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:19:26,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:19:26,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2712 [2020-10-27 14:19:26,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:26,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:26,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:19:26,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:26,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:19:26,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:26,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:26,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:26,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:26,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:19:26,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:26,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:26,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:27,005 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 14:19:27,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016596466] [2020-10-27 14:19:27,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:19:27,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:19:27,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908101850] [2020-10-27 14:19:27,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:19:27,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:19:27,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:19:27,039 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-27 14:19:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:27,240 INFO L93 Difference]: Finished difference Result 101 states and 147 transitions. [2020-10-27 14:19:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:19:27,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-27 14:19:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:27,249 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:19:27,250 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:19:27,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:19:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:19:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 14:19:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:19:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-10-27 14:19:27,296 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 33 [2020-10-27 14:19:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:27,297 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-10-27 14:19:27,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:19:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-10-27 14:19:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:19:27,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:27,299 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] [2020-10-27 14:19:27,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:19:27,299 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:27,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1329797022, now seen corresponding path program 1 times [2020-10-27 14:19:27,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:27,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144403331] [2020-10-27 14:19:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:27,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:32,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:19:32,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:19:32,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:19:32,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:19:32,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:19:32,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:19:32,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:19:32,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:32,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:32,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:32,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:32,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:19:32,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:32,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:32,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:32,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:32,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:32,434 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 14:19:32,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144403331] [2020-10-27 14:19:32,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:19:32,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:19:32,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321766567] [2020-10-27 14:19:32,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:19:32,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:32,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:19:32,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:19:32,444 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 4 states. [2020-10-27 14:19:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:32,761 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2020-10-27 14:19:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:19:32,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 14:19:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:32,765 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:19:32,766 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:19:32,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:19:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:19:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-10-27 14:19:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:19:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-10-27 14:19:32,785 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 33 [2020-10-27 14:19:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:32,787 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-10-27 14:19:32,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:19:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-10-27 14:19:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:19:32,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:32,790 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] [2020-10-27 14:19:32,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:19:32,792 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1631139216, now seen corresponding path program 1 times [2020-10-27 14:19:32,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:32,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187933849] [2020-10-27 14:19:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:32,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:33,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:34,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:37,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:19:37,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:19:37,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:19:37,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:37,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:19:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:19:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:19:37,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:37,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:37,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:37,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:37,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:37,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:37,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:37,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:37,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:37,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:37,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 14:19:37,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187933849] [2020-10-27 14:19:37,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:37,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:19:37,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724061207] [2020-10-27 14:19:37,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:19:37,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:19:37,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:19:37,923 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 5 states. [2020-10-27 14:19:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:38,205 INFO L93 Difference]: Finished difference Result 129 states and 156 transitions. [2020-10-27 14:19:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:19:38,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-10-27 14:19:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:38,207 INFO L225 Difference]: With dead ends: 129 [2020-10-27 14:19:38,207 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:19:38,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:19:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:19:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2020-10-27 14:19:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:19:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-27 14:19:38,230 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 51 [2020-10-27 14:19:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:38,231 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-27 14:19:38,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:19:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-27 14:19:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:19:38,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:38,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 14:19:38,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:19:38,236 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:38,238 INFO L82 PathProgramCache]: Analyzing trace with hash -168950530, now seen corresponding path program 2 times [2020-10-27 14:19:38,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:38,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650009351] [2020-10-27 14:19:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:38,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:38,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:38,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:38,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:38,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:38,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:43,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:19:43,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:43,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:19:43,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:43,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:19:43,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:19:43,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:19:43,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:43,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:43,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:43,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:43,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:19:43,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:43,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:43,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:43,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:43,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-27 14:19:43,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650009351] [2020-10-27 14:19:43,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:43,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:19:43,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900773969] [2020-10-27 14:19:43,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:19:43,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:43,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:19:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:19:43,362 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-10-27 14:19:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:43,633 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2020-10-27 14:19:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:19:43,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-27 14:19:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:43,635 INFO L225 Difference]: With dead ends: 163 [2020-10-27 14:19:43,635 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:19:43,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:19:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:19:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-10-27 14:19:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:19:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2020-10-27 14:19:43,648 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 69 [2020-10-27 14:19:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:43,648 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2020-10-27 14:19:43,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:19:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2020-10-27 14:19:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:19:43,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:43,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:19:43,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:19:43,652 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:43,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1278048268, now seen corresponding path program 3 times [2020-10-27 14:19:43,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:43,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223002263] [2020-10-27 14:19:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:43,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:48,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:19:48,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:48,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:19:48,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:48,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:19:48,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:19:48,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:19:48,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:48,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:48,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:48,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:48,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:48,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:48,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:48,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 14:19:48,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223002263] [2020-10-27 14:19:48,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:48,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:19:48,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142863178] [2020-10-27 14:19:48,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:19:48,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:19:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:48,791 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 7 states. [2020-10-27 14:19:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:49,106 INFO L93 Difference]: Finished difference Result 197 states and 224 transitions. [2020-10-27 14:19:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:19:49,106 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 87 [2020-10-27 14:19:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:49,108 INFO L225 Difference]: With dead ends: 197 [2020-10-27 14:19:49,108 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:19:49,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:19:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2020-10-27 14:19:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 14:19:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-10-27 14:19:49,120 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 87 [2020-10-27 14:19:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:49,121 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-10-27 14:19:49,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:19:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-10-27 14:19:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:19:49,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:49,123 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:19:49,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:19:49,123 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash -158858342, now seen corresponding path program 4 times [2020-10-27 14:19:49,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:49,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62125614] [2020-10-27 14:19:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:49,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:50,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:54,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 14:19:54,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:54,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:19:54,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:19:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:19:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:19:54,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:54,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:54,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:54,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:54,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:54,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:54,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:54,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-27 14:19:54,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62125614] [2020-10-27 14:19:54,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:54,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:19:54,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175683106] [2020-10-27 14:19:54,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:19:54,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:54,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:19:54,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:54,262 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 8 states. [2020-10-27 14:19:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:54,593 INFO L93 Difference]: Finished difference Result 231 states and 258 transitions. [2020-10-27 14:19:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:19:54,594 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 105 [2020-10-27 14:19:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:54,596 INFO L225 Difference]: With dead ends: 231 [2020-10-27 14:19:54,596 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 14:19:54,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 14:19:54,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2020-10-27 14:19:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 14:19:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2020-10-27 14:19:54,623 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 105 [2020-10-27 14:19:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:54,623 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2020-10-27 14:19:54,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:19:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2020-10-27 14:19:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 14:19:54,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:54,629 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:19:54,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:19:54,629 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:54,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1460176808, now seen corresponding path program 5 times [2020-10-27 14:19:54,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:54,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900025438] [2020-10-27 14:19:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:54,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:57,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:59,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:19:59,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:59,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:19:59,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:59,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:19:59,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:19:59,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:19:59,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:59,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:59,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:59,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:59,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:59,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:59,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-27 14:19:59,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900025438] [2020-10-27 14:19:59,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:59,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:19:59,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84075243] [2020-10-27 14:19:59,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:19:59,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:19:59,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:59,781 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand 9 states. [2020-10-27 14:20:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:00,264 INFO L93 Difference]: Finished difference Result 265 states and 292 transitions. [2020-10-27 14:20:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:20:00,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-10-27 14:20:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:00,266 INFO L225 Difference]: With dead ends: 265 [2020-10-27 14:20:00,267 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:20:00,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:20:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:20:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2020-10-27 14:20:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 14:20:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-10-27 14:20:00,279 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 123 [2020-10-27 14:20:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:00,279 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-10-27 14:20:00,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:20:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-10-27 14:20:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 14:20:00,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:00,282 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:00,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:20:00,283 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1430133706, now seen corresponding path program 6 times [2020-10-27 14:20:00,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:00,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024019036] [2020-10-27 14:20:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:00,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:04,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:05,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 14:20:05,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:20:05,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 14:20:05,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:05,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:20:05,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:20:05,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:20:05,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:05,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:05,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:05,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:05,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:05,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:05,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:05,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-27 14:20:05,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024019036] [2020-10-27 14:20:05,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:05,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:20:05,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819835797] [2020-10-27 14:20:05,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:20:05,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:05,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:20:05,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:20:05,476 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 10 states. [2020-10-27 14:20:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:05,891 INFO L93 Difference]: Finished difference Result 299 states and 326 transitions. [2020-10-27 14:20:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:20:05,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 141 [2020-10-27 14:20:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:05,893 INFO L225 Difference]: With dead ends: 299 [2020-10-27 14:20:05,893 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 14:20:05,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:20:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 14:20:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 165. [2020-10-27 14:20:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 14:20:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2020-10-27 14:20:05,911 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 141 [2020-10-27 14:20:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:05,912 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2020-10-27 14:20:05,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:20:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2020-10-27 14:20:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 14:20:05,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:05,919 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:05,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:20:05,919 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:05,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1473182020, now seen corresponding path program 7 times [2020-10-27 14:20:05,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:05,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405274988] [2020-10-27 14:20:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:05,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:10,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 14:20:10,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:20:10,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:20:10,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:10,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:20:10,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 14:20:10,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:20:10,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:11,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:11,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:11,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:11,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:11,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:11,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:11,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-27 14:20:11,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405274988] [2020-10-27 14:20:11,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:11,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:20:11,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352961122] [2020-10-27 14:20:11,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:20:11,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:11,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:20:11,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:20:11,077 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand 11 states. [2020-10-27 14:20:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:11,523 INFO L93 Difference]: Finished difference Result 333 states and 360 transitions. [2020-10-27 14:20:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:20:11,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 159 [2020-10-27 14:20:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:11,525 INFO L225 Difference]: With dead ends: 333 [2020-10-27 14:20:11,525 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 14:20:11,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:20:11,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 14:20:11,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2020-10-27 14:20:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 14:20:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 193 transitions. [2020-10-27 14:20:11,536 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 193 transitions. Word has length 159 [2020-10-27 14:20:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:11,536 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 193 transitions. [2020-10-27 14:20:11,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:20:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 193 transitions. [2020-10-27 14:20:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-27 14:20:11,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:11,540 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:11,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:20:11,540 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:11,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1152211246, now seen corresponding path program 8 times [2020-10-27 14:20:11,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:11,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826048879] [2020-10-27 14:20:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:16,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-27 14:20:16,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:16,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-27 14:20:16,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:16,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:20:16,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:20:16,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:20:16,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:16,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:16,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:16,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:16,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:16,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:16,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:16,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:16,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:16,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:16,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-27 14:20:16,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826048879] [2020-10-27 14:20:16,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:16,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:20:16,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2987492] [2020-10-27 14:20:16,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:20:16,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:16,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:20:16,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:20:16,775 INFO L87 Difference]: Start difference. First operand 183 states and 193 transitions. Second operand 12 states. [2020-10-27 14:20:17,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:17,205 INFO L93 Difference]: Finished difference Result 367 states and 394 transitions. [2020-10-27 14:20:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:20:17,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 177 [2020-10-27 14:20:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:17,207 INFO L225 Difference]: With dead ends: 367 [2020-10-27 14:20:17,207 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 14:20:17,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:20:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 14:20:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 201. [2020-10-27 14:20:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 14:20:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 211 transitions. [2020-10-27 14:20:17,221 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 211 transitions. Word has length 177 [2020-10-27 14:20:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:17,222 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 211 transitions. [2020-10-27 14:20:17,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:20:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 211 transitions. [2020-10-27 14:20:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 14:20:17,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:17,224 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:17,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:20:17,225 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:17,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:17,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2004339936, now seen corresponding path program 9 times [2020-10-27 14:20:17,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:17,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527258309] [2020-10-27 14:20:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:17,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:22,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:22,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 14:20:22,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:22,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-27 14:20:22,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:20:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 14:20:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:20:22,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:22,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:22,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:22,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:22,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:22,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:22,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:22,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:22,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:22,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:22,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:22,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-27 14:20:22,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527258309] [2020-10-27 14:20:22,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:22,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:20:22,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496397707] [2020-10-27 14:20:22,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:20:22,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:22,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:20:22,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:20:22,521 INFO L87 Difference]: Start difference. First operand 201 states and 211 transitions. Second operand 13 states. [2020-10-27 14:20:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:23,052 INFO L93 Difference]: Finished difference Result 401 states and 428 transitions. [2020-10-27 14:20:23,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:20:23,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 195 [2020-10-27 14:20:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:23,054 INFO L225 Difference]: With dead ends: 401 [2020-10-27 14:20:23,054 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 14:20:23,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:20:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 14:20:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 219. [2020-10-27 14:20:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-27 14:20:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 229 transitions. [2020-10-27 14:20:23,065 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 229 transitions. Word has length 195 [2020-10-27 14:20:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:23,067 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 229 transitions. [2020-10-27 14:20:23,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:20:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 229 transitions. [2020-10-27 14:20:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 14:20:23,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:23,070 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:23,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:20:23,071 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:23,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1097943918, now seen corresponding path program 10 times [2020-10-27 14:20:23,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:23,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130809802] [2020-10-27 14:20:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:23,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:28,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:28,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-27 14:20:28,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:28,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-27 14:20:28,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:20:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 14:20:28,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:20:28,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:28,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:28,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:28,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:28,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:28,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:28,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:28,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:28,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:28,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:28,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:28,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-27 14:20:28,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130809802] [2020-10-27 14:20:28,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:28,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:20:28,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840593831] [2020-10-27 14:20:28,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:20:28,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:28,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:20:28,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:20:28,341 INFO L87 Difference]: Start difference. First operand 219 states and 229 transitions. Second operand 14 states. [2020-10-27 14:20:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:28,988 INFO L93 Difference]: Finished difference Result 435 states and 462 transitions. [2020-10-27 14:20:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:20:28,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 213 [2020-10-27 14:20:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:28,991 INFO L225 Difference]: With dead ends: 435 [2020-10-27 14:20:28,991 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 14:20:28,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:20:28,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 14:20:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 237. [2020-10-27 14:20:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 14:20:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 247 transitions. [2020-10-27 14:20:29,002 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 247 transitions. Word has length 213 [2020-10-27 14:20:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:29,003 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 247 transitions. [2020-10-27 14:20:29,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:20:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 247 transitions. [2020-10-27 14:20:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 14:20:29,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:29,006 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:29,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:20:29,006 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:29,007 INFO L82 PathProgramCache]: Analyzing trace with hash 796525180, now seen corresponding path program 11 times [2020-10-27 14:20:29,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:29,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448028448] [2020-10-27 14:20:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:34,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:34,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 14:20:34,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5255 [2020-10-27 14:20:34,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:20:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 14:20:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:20:34,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:34,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:34,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:34,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:34,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:34,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:34,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:34,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:34,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:34,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:34,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:34,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-27 14:20:34,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448028448] [2020-10-27 14:20:34,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:34,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:20:34,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151318648] [2020-10-27 14:20:34,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:20:34,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:34,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:20:34,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:20:34,507 INFO L87 Difference]: Start difference. First operand 237 states and 247 transitions. Second operand 15 states. [2020-10-27 14:20:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:35,133 INFO L93 Difference]: Finished difference Result 469 states and 496 transitions. [2020-10-27 14:20:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:20:35,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 231 [2020-10-27 14:20:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:35,137 INFO L225 Difference]: With dead ends: 469 [2020-10-27 14:20:35,137 INFO L226 Difference]: Without dead ends: 264 [2020-10-27 14:20:35,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:20:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-27 14:20:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 255. [2020-10-27 14:20:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-27 14:20:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 265 transitions. [2020-10-27 14:20:35,161 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 265 transitions. Word has length 231 [2020-10-27 14:20:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:35,162 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 265 transitions. [2020-10-27 14:20:35,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:20:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 265 transitions. [2020-10-27 14:20:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-27 14:20:35,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:35,166 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:35,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:20:35,166 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:35,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2032872950, now seen corresponding path program 12 times [2020-10-27 14:20:35,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:35,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32493549] [2020-10-27 14:20:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:35,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:40,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:40,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-27 14:20:40,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:40,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-27 14:20:40,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:40,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:20:40,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-27 14:20:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:20:40,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:40,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:40,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:40,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:40,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:40,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:40,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:40,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:40,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:40,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:40,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:40,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-27 14:20:40,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32493549] [2020-10-27 14:20:40,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:40,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:20:40,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215873597] [2020-10-27 14:20:40,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:20:40,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:40,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:20:40,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:20:40,511 INFO L87 Difference]: Start difference. First operand 255 states and 265 transitions. Second operand 16 states. [2020-10-27 14:20:41,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:41,257 INFO L93 Difference]: Finished difference Result 503 states and 530 transitions. [2020-10-27 14:20:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:20:41,258 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 249 [2020-10-27 14:20:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:41,261 INFO L225 Difference]: With dead ends: 503 [2020-10-27 14:20:41,261 INFO L226 Difference]: Without dead ends: 282 [2020-10-27 14:20:41,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:20:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-27 14:20:41,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 273. [2020-10-27 14:20:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 14:20:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 283 transitions. [2020-10-27 14:20:41,273 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 283 transitions. Word has length 249 [2020-10-27 14:20:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:41,273 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 283 transitions. [2020-10-27 14:20:41,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:20:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 283 transitions. [2020-10-27 14:20:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-27 14:20:41,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:41,277 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:41,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:20:41,277 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:41,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:41,278 INFO L82 PathProgramCache]: Analyzing trace with hash 164403736, now seen corresponding path program 13 times [2020-10-27 14:20:41,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:41,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347611081] [2020-10-27 14:20:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:46,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:46,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-27 14:20:46,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:46,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-27 14:20:46,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:46,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:20:46,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-27 14:20:46,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:20:46,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:46,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:46,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:46,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:46,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:46,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:46,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:46,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:46,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:46,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:46,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:46,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-27 14:20:46,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347611081] [2020-10-27 14:20:46,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:46,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:20:46,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74808495] [2020-10-27 14:20:46,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:20:46,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:46,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:20:46,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:46,655 INFO L87 Difference]: Start difference. First operand 273 states and 283 transitions. Second operand 17 states. [2020-10-27 14:20:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:47,392 INFO L93 Difference]: Finished difference Result 537 states and 564 transitions. [2020-10-27 14:20:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:20:47,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 267 [2020-10-27 14:20:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:47,395 INFO L225 Difference]: With dead ends: 537 [2020-10-27 14:20:47,395 INFO L226 Difference]: Without dead ends: 300 [2020-10-27 14:20:47,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-27 14:20:47,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 291. [2020-10-27 14:20:47,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-27 14:20:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 301 transitions. [2020-10-27 14:20:47,409 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 301 transitions. Word has length 267 [2020-10-27 14:20:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:47,409 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 301 transitions. [2020-10-27 14:20:47,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:20:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 301 transitions. [2020-10-27 14:20:47,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-27 14:20:47,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:47,411 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:47,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:20:47,411 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:47,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:47,412 INFO L82 PathProgramCache]: Analyzing trace with hash -978044250, now seen corresponding path program 14 times [2020-10-27 14:20:47,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:47,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83136685] [2020-10-27 14:20:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:47,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:47,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:47,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:47,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:47,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:47,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:52,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:52,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-27 14:20:52,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:52,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 14:20:52,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:20:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:20:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:20:52,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:52,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:52,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:52,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:52,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:52,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:52,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:52,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-27 14:20:52,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83136685] [2020-10-27 14:20:52,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:52,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:20:52,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017289671] [2020-10-27 14:20:52,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:20:52,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:52,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:20:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:52,732 INFO L87 Difference]: Start difference. First operand 291 states and 301 transitions. Second operand 18 states. [2020-10-27 14:20:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:53,520 INFO L93 Difference]: Finished difference Result 571 states and 598 transitions. [2020-10-27 14:20:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:20:53,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 285 [2020-10-27 14:20:53,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:53,523 INFO L225 Difference]: With dead ends: 571 [2020-10-27 14:20:53,523 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 14:20:53,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 14:20:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 309. [2020-10-27 14:20:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-27 14:20:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 319 transitions. [2020-10-27 14:20:53,538 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 319 transitions. Word has length 285 [2020-10-27 14:20:53,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:53,538 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 319 transitions. [2020-10-27 14:20:53,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:20:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 319 transitions. [2020-10-27 14:20:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-27 14:20:53,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:53,541 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:53,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:20:53,541 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:53,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1625723828, now seen corresponding path program 15 times [2020-10-27 14:20:53,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:53,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884001754] [2020-10-27 14:20:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:58,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:58,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 14:20:58,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:58,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 14:20:58,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:20:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-27 14:20:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:20:58,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:58,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:58,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:58,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:58,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:58,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:58,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:58,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-27 14:20:58,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884001754] [2020-10-27 14:20:58,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:58,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:20:58,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783343211] [2020-10-27 14:20:58,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:20:58,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:58,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:20:58,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:58,916 INFO L87 Difference]: Start difference. First operand 309 states and 319 transitions. Second operand 19 states. [2020-10-27 14:20:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:59,697 INFO L93 Difference]: Finished difference Result 605 states and 632 transitions. [2020-10-27 14:20:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:20:59,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 303 [2020-10-27 14:20:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:59,700 INFO L225 Difference]: With dead ends: 605 [2020-10-27 14:20:59,700 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 14:20:59,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 14:20:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 327. [2020-10-27 14:20:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-27 14:20:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 337 transitions. [2020-10-27 14:20:59,715 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 337 transitions. Word has length 303 [2020-10-27 14:20:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:59,716 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 337 transitions. [2020-10-27 14:20:59,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:20:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 337 transitions. [2020-10-27 14:20:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-27 14:20:59,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:59,718 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:59,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:20:59,718 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash -389642942, now seen corresponding path program 16 times [2020-10-27 14:20:59,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:59,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495398068] [2020-10-27 14:20:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:59,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:59,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:59,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:59,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:00,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:04,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-27 14:21:04,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:21:04,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-27 14:21:04,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:04,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:21:04,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-27 14:21:04,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:21:04,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:05,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:05,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:05,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:05,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:05,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:05,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:21:05,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:05,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:05,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:05,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:05,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-27 14:21:05,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495398068] [2020-10-27 14:21:05,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:05,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:21:05,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494893186] [2020-10-27 14:21:05,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:21:05,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:05,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:21:05,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:21:05,108 INFO L87 Difference]: Start difference. First operand 327 states and 337 transitions. Second operand 20 states. [2020-10-27 14:21:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:05,964 INFO L93 Difference]: Finished difference Result 639 states and 666 transitions. [2020-10-27 14:21:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:21:05,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 321 [2020-10-27 14:21:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:05,967 INFO L225 Difference]: With dead ends: 639 [2020-10-27 14:21:05,967 INFO L226 Difference]: Without dead ends: 354 [2020-10-27 14:21:05,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:21:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-27 14:21:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 345. [2020-10-27 14:21:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-27 14:21:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 355 transitions. [2020-10-27 14:21:05,982 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 355 transitions. Word has length 321 [2020-10-27 14:21:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:05,983 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 355 transitions. [2020-10-27 14:21:05,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:21:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 355 transitions. [2020-10-27 14:21:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-27 14:21:05,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:05,985 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:05,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:21:05,986 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:05,986 INFO L82 PathProgramCache]: Analyzing trace with hash 532606800, now seen corresponding path program 17 times [2020-10-27 14:21:05,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:05,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904854452] [2020-10-27 14:21:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:06,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:06,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:06,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:06,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:06,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:11,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-27 14:21:11,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:21:11,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5886 [2020-10-27 14:21:11,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:11,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:21:11,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 14:21:11,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:21:11,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:12,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:12,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:12,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:12,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:12,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:12,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:12,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:12,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:12,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:12,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:12,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-27 14:21:12,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904854452] [2020-10-27 14:21:12,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:12,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:21:12,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074459266] [2020-10-27 14:21:12,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:21:12,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:12,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:21:12,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:21:12,226 INFO L87 Difference]: Start difference. First operand 345 states and 355 transitions. Second operand 21 states. [2020-10-27 14:21:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:13,079 INFO L93 Difference]: Finished difference Result 673 states and 700 transitions. [2020-10-27 14:21:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:21:13,080 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 339 [2020-10-27 14:21:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:13,083 INFO L225 Difference]: With dead ends: 673 [2020-10-27 14:21:13,083 INFO L226 Difference]: Without dead ends: 372 [2020-10-27 14:21:13,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:21:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-27 14:21:13,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 363. [2020-10-27 14:21:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-10-27 14:21:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 373 transitions. [2020-10-27 14:21:13,098 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 373 transitions. Word has length 339 [2020-10-27 14:21:13,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:13,098 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 373 transitions. [2020-10-27 14:21:13,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:21:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 373 transitions. [2020-10-27 14:21:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-27 14:21:13,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:13,101 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:13,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:21:13,101 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:13,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1262662110, now seen corresponding path program 18 times [2020-10-27 14:21:13,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:13,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670191906] [2020-10-27 14:21:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:13,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:13,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:13,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:13,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:13,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:13,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:18,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 367 [2020-10-27 14:21:18,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:21:18,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5179 [2020-10-27 14:21:18,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:18,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:21:18,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-10-27 14:21:18,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:21:18,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:18,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:18,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:18,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:18,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:18,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:21:18,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:18,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:18,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:18,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:18,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-27 14:21:18,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670191906] [2020-10-27 14:21:18,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:18,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:21:18,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955400322] [2020-10-27 14:21:18,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:21:18,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:18,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:21:18,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:21:18,838 INFO L87 Difference]: Start difference. First operand 363 states and 373 transitions. Second operand 22 states. [2020-10-27 14:21:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:19,755 INFO L93 Difference]: Finished difference Result 707 states and 734 transitions. [2020-10-27 14:21:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:21:19,755 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 357 [2020-10-27 14:21:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:19,757 INFO L225 Difference]: With dead ends: 707 [2020-10-27 14:21:19,757 INFO L226 Difference]: Without dead ends: 390 [2020-10-27 14:21:19,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:21:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-27 14:21:19,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 381. [2020-10-27 14:21:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-27 14:21:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 391 transitions. [2020-10-27 14:21:19,772 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 391 transitions. Word has length 357 [2020-10-27 14:21:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:19,772 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 391 transitions. [2020-10-27 14:21:19,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:21:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 391 transitions. [2020-10-27 14:21:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-27 14:21:19,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:19,775 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:19,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:21:19,776 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2117292820, now seen corresponding path program 19 times [2020-10-27 14:21:19,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:19,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018344898] [2020-10-27 14:21:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:19,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:19,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:19,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:20,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:20,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:25,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:25,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-27 14:21:25,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:21:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5684 [2020-10-27 14:21:25,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:21:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-10-27 14:21:25,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:21:25,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:25,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:25,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:25,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:25,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:25,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:25,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:25,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2020-10-27 14:21:26,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018344898] [2020-10-27 14:21:26,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:26,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:21:26,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085297220] [2020-10-27 14:21:26,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:21:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:26,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:21:26,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:21:26,039 INFO L87 Difference]: Start difference. First operand 381 states and 391 transitions. Second operand 23 states. [2020-10-27 14:21:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:27,108 INFO L93 Difference]: Finished difference Result 741 states and 768 transitions. [2020-10-27 14:21:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:21:27,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 375 [2020-10-27 14:21:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:27,112 INFO L225 Difference]: With dead ends: 741 [2020-10-27 14:21:27,112 INFO L226 Difference]: Without dead ends: 408 [2020-10-27 14:21:27,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:21:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-27 14:21:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 399. [2020-10-27 14:21:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-27 14:21:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 409 transitions. [2020-10-27 14:21:27,128 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 409 transitions. Word has length 375 [2020-10-27 14:21:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:27,129 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 409 transitions. [2020-10-27 14:21:27,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:21:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 409 transitions. [2020-10-27 14:21:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-27 14:21:27,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:27,131 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:27,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:21:27,132 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2027929722, now seen corresponding path program 20 times [2020-10-27 14:21:27,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:27,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030799049] [2020-10-27 14:21:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:27,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:32,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:32,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-27 14:21:32,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:21:32,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5374 [2020-10-27 14:21:32,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:21:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-27 14:21:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:21:32,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:32,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:32,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:32,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:32,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:32,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:32,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:32,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:32,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:32,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2020-10-27 14:21:33,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030799049] [2020-10-27 14:21:33,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:33,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:21:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390303627] [2020-10-27 14:21:33,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:21:33,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:21:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:21:33,035 INFO L87 Difference]: Start difference. First operand 399 states and 409 transitions. Second operand 24 states. [2020-10-27 14:21:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:34,136 INFO L93 Difference]: Finished difference Result 775 states and 802 transitions. [2020-10-27 14:21:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:21:34,140 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 393 [2020-10-27 14:21:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:34,142 INFO L225 Difference]: With dead ends: 775 [2020-10-27 14:21:34,142 INFO L226 Difference]: Without dead ends: 426 [2020-10-27 14:21:34,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:21:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-27 14:21:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 417. [2020-10-27 14:21:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-10-27 14:21:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 427 transitions. [2020-10-27 14:21:34,157 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 427 transitions. Word has length 393 [2020-10-27 14:21:34,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:34,157 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 427 transitions. [2020-10-27 14:21:34,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:21:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 427 transitions. [2020-10-27 14:21:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-10-27 14:21:34,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:34,160 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:34,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:21:34,160 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash -754529144, now seen corresponding path program 21 times [2020-10-27 14:21:34,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:34,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303642813] [2020-10-27 14:21:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:34,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:39,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:39,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-27 14:21:39,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:21:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5760 [2020-10-27 14:21:39,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:21:39,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-10-27 14:21:39,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:21:39,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:40,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:40,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:40,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:40,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:40,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:40,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:40,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:40,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2020-10-27 14:21:40,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303642813] [2020-10-27 14:21:40,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:40,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:21:40,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203553150] [2020-10-27 14:21:40,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:21:40,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:40,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:21:40,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:21:40,441 INFO L87 Difference]: Start difference. First operand 417 states and 427 transitions. Second operand 25 states. [2020-10-27 14:21:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:41,463 INFO L93 Difference]: Finished difference Result 809 states and 836 transitions. [2020-10-27 14:21:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:21:41,464 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 411 [2020-10-27 14:21:41,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:41,467 INFO L225 Difference]: With dead ends: 809 [2020-10-27 14:21:41,467 INFO L226 Difference]: Without dead ends: 444 [2020-10-27 14:21:41,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:21:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-27 14:21:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 435. [2020-10-27 14:21:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-27 14:21:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 445 transitions. [2020-10-27 14:21:41,485 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 445 transitions. Word has length 411 [2020-10-27 14:21:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:41,485 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 445 transitions. [2020-10-27 14:21:41,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:21:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 445 transitions. [2020-10-27 14:21:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-27 14:21:41,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:41,488 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:41,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:21:41,489 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:41,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:41,489 INFO L82 PathProgramCache]: Analyzing trace with hash -304828138, now seen corresponding path program 22 times [2020-10-27 14:21:41,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:41,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043037014] [2020-10-27 14:21:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:41,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:41,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:41,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:41,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:42,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:42,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:46,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:46,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 439 [2020-10-27 14:21:46,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:21:46,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5396 [2020-10-27 14:21:46,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:46,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:21:46,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-10-27 14:21:46,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:21:46,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:47,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:47,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:47,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:47,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:47,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:47,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:47,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:47,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2020-10-27 14:21:47,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043037014] [2020-10-27 14:21:47,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:47,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:21:47,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56350704] [2020-10-27 14:21:47,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:21:47,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:47,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:21:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:21:47,458 INFO L87 Difference]: Start difference. First operand 435 states and 445 transitions. Second operand 26 states. [2020-10-27 14:21:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:48,584 INFO L93 Difference]: Finished difference Result 843 states and 870 transitions. [2020-10-27 14:21:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:21:48,584 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 429 [2020-10-27 14:21:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:48,588 INFO L225 Difference]: With dead ends: 843 [2020-10-27 14:21:48,588 INFO L226 Difference]: Without dead ends: 462 [2020-10-27 14:21:48,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:21:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-27 14:21:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 453. [2020-10-27 14:21:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-27 14:21:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 463 transitions. [2020-10-27 14:21:48,604 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 463 transitions. Word has length 429 [2020-10-27 14:21:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:48,605 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 463 transitions. [2020-10-27 14:21:48,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:21:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 463 transitions. [2020-10-27 14:21:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-27 14:21:48,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:48,608 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:48,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:21:48,609 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:48,609 INFO L82 PathProgramCache]: Analyzing trace with hash 803491364, now seen corresponding path program 23 times [2020-10-27 14:21:48,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:48,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286906968] [2020-10-27 14:21:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:48,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:48,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:48,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:53,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:53,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-10-27 14:21:53,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:21:53,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5163 [2020-10-27 14:21:53,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:53,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:21:53,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-27 14:21:53,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:21:53,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:54,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:54,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:54,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:54,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:54,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:54,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2020-10-27 14:21:54,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286906968] [2020-10-27 14:21:54,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:54,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:21:54,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87953295] [2020-10-27 14:21:54,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:21:54,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:54,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:21:54,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:54,369 INFO L87 Difference]: Start difference. First operand 453 states and 463 transitions. Second operand 27 states. [2020-10-27 14:21:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:55,645 INFO L93 Difference]: Finished difference Result 877 states and 904 transitions. [2020-10-27 14:21:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:21:55,646 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 447 [2020-10-27 14:21:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:55,649 INFO L225 Difference]: With dead ends: 877 [2020-10-27 14:21:55,649 INFO L226 Difference]: Without dead ends: 480 [2020-10-27 14:21:55,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-10-27 14:21:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 471. [2020-10-27 14:21:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-27 14:21:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 481 transitions. [2020-10-27 14:21:55,665 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 481 transitions. Word has length 447 [2020-10-27 14:21:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:55,665 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 481 transitions. [2020-10-27 14:21:55,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:21:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 481 transitions. [2020-10-27 14:21:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-10-27 14:21:55,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:55,668 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:55,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:21:55,669 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash -690453582, now seen corresponding path program 24 times [2020-10-27 14:21:55,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:55,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915548357] [2020-10-27 14:21:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:55,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:55,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:55,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:55,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:56,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:56,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:00,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:00,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 475 [2020-10-27 14:22:00,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:22:00,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-27 14:22:00,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:00,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:22:00,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 213 [2020-10-27 14:22:00,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:22:00,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:01,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:01,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:01,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:01,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:01,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:01,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:01,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:01,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:01,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:01,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:01,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2020-10-27 14:22:01,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915548357] [2020-10-27 14:22:01,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:01,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:22:01,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222270041] [2020-10-27 14:22:01,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:22:01,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:22:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:22:01,438 INFO L87 Difference]: Start difference. First operand 471 states and 481 transitions. Second operand 28 states. [2020-10-27 14:22:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:02,788 INFO L93 Difference]: Finished difference Result 911 states and 938 transitions. [2020-10-27 14:22:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:22:02,789 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 465 [2020-10-27 14:22:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:02,792 INFO L225 Difference]: With dead ends: 911 [2020-10-27 14:22:02,792 INFO L226 Difference]: Without dead ends: 498 [2020-10-27 14:22:02,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:22:02,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-10-27 14:22:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 489. [2020-10-27 14:22:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-27 14:22:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 499 transitions. [2020-10-27 14:22:02,807 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 499 transitions. Word has length 465 [2020-10-27 14:22:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:02,807 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 499 transitions. [2020-10-27 14:22:02,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:22:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 499 transitions. [2020-10-27 14:22:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-10-27 14:22:02,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:02,811 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:02,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:22:02,811 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:02,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:02,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1163669952, now seen corresponding path program 25 times [2020-10-27 14:22:02,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:02,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262097009] [2020-10-27 14:22:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:02,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:03,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:03,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:08,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:08,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 493 [2020-10-27 14:22:08,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:22:08,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5833 [2020-10-27 14:22:08,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:22:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 221 [2020-10-27 14:22:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:22:08,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:09,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:09,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:09,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:09,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:09,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:22:09,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:09,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2020-10-27 14:22:09,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262097009] [2020-10-27 14:22:09,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:09,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:22:09,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825514164] [2020-10-27 14:22:09,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:22:09,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:09,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:22:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:22:09,363 INFO L87 Difference]: Start difference. First operand 489 states and 499 transitions. Second operand 29 states. [2020-10-27 14:22:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:10,553 INFO L93 Difference]: Finished difference Result 945 states and 972 transitions. [2020-10-27 14:22:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:22:10,554 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 483 [2020-10-27 14:22:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:10,557 INFO L225 Difference]: With dead ends: 945 [2020-10-27 14:22:10,557 INFO L226 Difference]: Without dead ends: 516 [2020-10-27 14:22:10,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:22:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-10-27 14:22:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 507. [2020-10-27 14:22:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-10-27 14:22:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 517 transitions. [2020-10-27 14:22:10,571 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 517 transitions. Word has length 483 [2020-10-27 14:22:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:10,571 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 517 transitions. [2020-10-27 14:22:10,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:22:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 517 transitions. [2020-10-27 14:22:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-10-27 14:22:10,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:10,575 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:10,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:22:10,575 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:10,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:10,576 INFO L82 PathProgramCache]: Analyzing trace with hash -786286514, now seen corresponding path program 26 times [2020-10-27 14:22:10,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:10,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769268439] [2020-10-27 14:22:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:10,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:10,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:10,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:11,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:15,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:15,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 511 [2020-10-27 14:22:15,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:22:15,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5274 [2020-10-27 14:22:15,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:15,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:22:15,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 229 [2020-10-27 14:22:15,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:22:15,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:16,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:16,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:16,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:16,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:16,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:16,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:16,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:16,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2020-10-27 14:22:16,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769268439] [2020-10-27 14:22:16,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:16,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:22:16,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173725860] [2020-10-27 14:22:16,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:22:16,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:16,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:22:16,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:22:16,595 INFO L87 Difference]: Start difference. First operand 507 states and 517 transitions. Second operand 30 states. [2020-10-27 14:22:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:18,023 INFO L93 Difference]: Finished difference Result 979 states and 1006 transitions. [2020-10-27 14:22:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:22:18,024 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 501 [2020-10-27 14:22:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:18,027 INFO L225 Difference]: With dead ends: 979 [2020-10-27 14:22:18,027 INFO L226 Difference]: Without dead ends: 534 [2020-10-27 14:22:18,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:22:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-10-27 14:22:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 525. [2020-10-27 14:22:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2020-10-27 14:22:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 535 transitions. [2020-10-27 14:22:18,042 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 535 transitions. Word has length 501 [2020-10-27 14:22:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:18,042 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 535 transitions. [2020-10-27 14:22:18,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:22:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 535 transitions. [2020-10-27 14:22:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2020-10-27 14:22:18,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:18,047 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:18,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:22:18,047 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:18,047 INFO L82 PathProgramCache]: Analyzing trace with hash 283473756, now seen corresponding path program 27 times [2020-10-27 14:22:18,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:18,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119045441] [2020-10-27 14:22:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:18,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:29,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:29,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 529 [2020-10-27 14:22:29,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:22:29,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11499 [2020-10-27 14:22:29,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:29,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:22:29,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 237 [2020-10-27 14:22:29,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:22:29,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:30,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:30,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:30,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:30,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:30,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:30,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:30,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:30,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:30,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:30,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:30,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2020-10-27 14:22:30,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119045441] [2020-10-27 14:22:30,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:30,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:22:30,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545663463] [2020-10-27 14:22:30,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:22:30,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:30,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:22:30,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:22:30,276 INFO L87 Difference]: Start difference. First operand 525 states and 535 transitions. Second operand 31 states. [2020-10-27 14:22:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:31,652 INFO L93 Difference]: Finished difference Result 1013 states and 1040 transitions. [2020-10-27 14:22:31,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:22:31,653 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 519 [2020-10-27 14:22:31,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:31,655 INFO L225 Difference]: With dead ends: 1013 [2020-10-27 14:22:31,656 INFO L226 Difference]: Without dead ends: 552 [2020-10-27 14:22:31,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:22:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-10-27 14:22:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 543. [2020-10-27 14:22:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-10-27 14:22:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 553 transitions. [2020-10-27 14:22:31,671 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 553 transitions. Word has length 519 [2020-10-27 14:22:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:31,672 INFO L481 AbstractCegarLoop]: Abstraction has 543 states and 553 transitions. [2020-10-27 14:22:31,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:22:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 553 transitions. [2020-10-27 14:22:31,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2020-10-27 14:22:31,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:31,676 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:31,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:22:31,676 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:31,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1435971862, now seen corresponding path program 28 times [2020-10-27 14:22:31,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:31,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781835668] [2020-10-27 14:22:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:31,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:31,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:31,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:36,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:36,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 547 [2020-10-27 14:22:36,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:22:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-27 14:22:36,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:22:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 245 [2020-10-27 14:22:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:22:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:37,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:37,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:37,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:37,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:37,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:37,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:37,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:37,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:37,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:22:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2020-10-27 14:22:37,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781835668] [2020-10-27 14:22:37,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:37,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:22:37,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290346596] [2020-10-27 14:22:37,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:22:37,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:37,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:22:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:22:37,651 INFO L87 Difference]: Start difference. First operand 543 states and 553 transitions. Second operand 32 states. [2020-10-27 14:22:39,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:39,058 INFO L93 Difference]: Finished difference Result 1047 states and 1074 transitions. [2020-10-27 14:22:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:22:39,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 537 [2020-10-27 14:22:39,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:39,062 INFO L225 Difference]: With dead ends: 1047 [2020-10-27 14:22:39,062 INFO L226 Difference]: Without dead ends: 570 [2020-10-27 14:22:39,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:22:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-10-27 14:22:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 561. [2020-10-27 14:22:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 561 states. [2020-10-27 14:22:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 571 transitions. [2020-10-27 14:22:39,078 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 571 transitions. Word has length 537 [2020-10-27 14:22:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:39,078 INFO L481 AbstractCegarLoop]: Abstraction has 561 states and 571 transitions. [2020-10-27 14:22:39,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:22:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 571 transitions. [2020-10-27 14:22:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2020-10-27 14:22:39,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:39,083 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:39,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:22:39,083 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:39,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1602806024, now seen corresponding path program 29 times [2020-10-27 14:22:39,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:39,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530547355] [2020-10-27 14:22:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:39,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:39,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:39,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:39,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:39,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:39,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:51,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:51,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 565 [2020-10-27 14:22:51,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:22:51,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12398 [2020-10-27 14:22:51,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:22:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 253 [2020-10-27 14:22:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:22:51,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:52,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:52,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:52,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:52,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:52,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:52,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:52,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:52,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2020-10-27 14:22:52,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530547355] [2020-10-27 14:22:52,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:52,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:22:52,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903625814] [2020-10-27 14:22:52,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:22:52,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:52,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:22:52,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:22:52,303 INFO L87 Difference]: Start difference. First operand 561 states and 571 transitions. Second operand 33 states. [2020-10-27 14:22:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:53,866 INFO L93 Difference]: Finished difference Result 1081 states and 1108 transitions. [2020-10-27 14:22:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:22:53,867 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 555 [2020-10-27 14:22:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:53,869 INFO L225 Difference]: With dead ends: 1081 [2020-10-27 14:22:53,869 INFO L226 Difference]: Without dead ends: 588 [2020-10-27 14:22:53,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:22:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2020-10-27 14:22:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 579. [2020-10-27 14:22:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-27 14:22:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 589 transitions. [2020-10-27 14:22:53,888 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 589 transitions. Word has length 555 [2020-10-27 14:22:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:53,889 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 589 transitions. [2020-10-27 14:22:53,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:22:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 589 transitions. [2020-10-27 14:22:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2020-10-27 14:22:53,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:53,894 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:53,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:22:53,894 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash 551765894, now seen corresponding path program 30 times [2020-10-27 14:22:53,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:53,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838096262] [2020-10-27 14:22:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:53,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:54,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:54,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:54,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:54,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:54,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:59,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:59,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 583 [2020-10-27 14:22:59,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:22:59,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5750 [2020-10-27 14:22:59,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:22:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 261 [2020-10-27 14:22:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:22:59,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:00,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:00,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:00,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:00,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:00,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:00,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:00,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:00,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:00,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:00,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:00,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2020-10-27 14:23:00,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838096262] [2020-10-27 14:23:00,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:00,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:23:00,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510382932] [2020-10-27 14:23:00,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:23:00,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:00,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:23:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:23:00,535 INFO L87 Difference]: Start difference. First operand 579 states and 589 transitions. Second operand 34 states. [2020-10-27 14:23:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:23:02,257 INFO L93 Difference]: Finished difference Result 1115 states and 1142 transitions. [2020-10-27 14:23:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:23:02,258 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 573 [2020-10-27 14:23:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:23:02,261 INFO L225 Difference]: With dead ends: 1115 [2020-10-27 14:23:02,261 INFO L226 Difference]: Without dead ends: 606 [2020-10-27 14:23:02,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:23:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-27 14:23:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 597. [2020-10-27 14:23:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-10-27 14:23:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 607 transitions. [2020-10-27 14:23:02,276 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 607 transitions. Word has length 573 [2020-10-27 14:23:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:23:02,277 INFO L481 AbstractCegarLoop]: Abstraction has 597 states and 607 transitions. [2020-10-27 14:23:02,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:23:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 607 transitions. [2020-10-27 14:23:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-10-27 14:23:02,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:23:02,282 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:02,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:23:02,282 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:23:02,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:23:02,283 INFO L82 PathProgramCache]: Analyzing trace with hash -762828652, now seen corresponding path program 31 times [2020-10-27 14:23:02,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:23:02,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94371915] [2020-10-27 14:23:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:23:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:02,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:02,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:02,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:02,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:07,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:07,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 601 [2020-10-27 14:23:07,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:23:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:23:07,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:23:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 269 [2020-10-27 14:23:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:23:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:08,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:23:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:23:08,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:23:08,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:23:08,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:23:08,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:23:08,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:23:08,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:23:08,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:23:08,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:23:08,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:23:08,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:23:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2020-10-27 14:23:08,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94371915] [2020-10-27 14:23:08,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:23:08,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:23:08,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942700233] [2020-10-27 14:23:08,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:23:08,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:23:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:23:08,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:23:08,198 INFO L87 Difference]: Start difference. First operand 597 states and 607 transitions. Second operand 35 states.