/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-tiling/tcpy.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:59:28,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:59:28,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:59:28,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:59:28,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:59:28,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:59:28,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:59:28,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:59:28,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:59:28,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:59:28,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:59:28,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:59:28,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:59:28,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:59:28,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:59:28,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:59:28,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:59:28,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:59:28,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:59:28,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:59:28,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:59:28,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:59:28,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:59:28,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:59:28,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:59:28,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:59:28,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:59:28,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:59:28,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:59:28,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:59:28,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:59:28,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:59:28,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:59:28,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:59:28,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:59:28,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:59:28,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:59:28,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:59:28,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:59:28,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:59:28,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:59:28,170 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 14:59:28,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:59:28,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:59:28,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:59:28,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:59:28,202 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:59:28,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:59:28,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:59:28,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:59:28,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:59:28,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:59:28,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:59:28,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:59:28,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:59:28,203 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:59:28,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:59:28,204 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:59:28,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:59:28,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:59:28,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:59:28,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:59:28,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:59:28,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:59:28,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:59:28,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:59:28,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:59:28,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:59:28,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:59:28,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:59:28,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:59:28,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:59:28,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:59:28,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:59:28,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:59:28,705 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:59:28,706 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:59:28,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/tcpy.c [2020-10-27 14:59:28,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b8a6fda1/4baa96887707474fbf4e59d71a8f4b92/FLAG1da79612b [2020-10-27 14:59:29,501 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:59:29,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/tcpy.c [2020-10-27 14:59:29,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b8a6fda1/4baa96887707474fbf4e59d71a8f4b92/FLAG1da79612b [2020-10-27 14:59:29,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b8a6fda1/4baa96887707474fbf4e59d71a8f4b92 [2020-10-27 14:59:29,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:59:29,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:59:29,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:59:29,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:59:29,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:59:29,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:59:29" (1/1) ... [2020-10-27 14:59:29,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a624960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:29, skipping insertion in model container [2020-10-27 14:59:29,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:59:29" (1/1) ... [2020-10-27 14:59:29,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:59:29,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:59:30,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:59:30,075 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:59:30,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:59:30,113 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:59:30,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30 WrapperNode [2020-10-27 14:59:30,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:59:30,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:59:30,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:59:30,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:59:30,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30" (1/1) ... [2020-10-27 14:59:30,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30" (1/1) ... [2020-10-27 14:59:30,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30" (1/1) ... [2020-10-27 14:59:30,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30" (1/1) ... [2020-10-27 14:59:30,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30" (1/1) ... [2020-10-27 14:59:30,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30" (1/1) ... [2020-10-27 14:59:30,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30" (1/1) ... [2020-10-27 14:59:30,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:59:30,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:59:30,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:59:30,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:59:30,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30" (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 14:59:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:59:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:59:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:59:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:59:30,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:59:30,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:59:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:59:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:59:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:59:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:59:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:59:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:59:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:59:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:59:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:59:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:59:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:59:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:59:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:59:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:59:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:59:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:59:30,790 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:59:30,790 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:59:30,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:59:30 BoogieIcfgContainer [2020-10-27 14:59:30,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:59:30,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:59:30,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:59:30,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:59:30,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:59:29" (1/3) ... [2020-10-27 14:59:30,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2c8353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:59:30, skipping insertion in model container [2020-10-27 14:59:30,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:30" (2/3) ... [2020-10-27 14:59:30,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2c8353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:59:30, skipping insertion in model container [2020-10-27 14:59:30,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:59:30" (3/3) ... [2020-10-27 14:59:30,828 INFO L111 eAbstractionObserver]: Analyzing ICFG tcpy.c [2020-10-27 14:59:30,843 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:59:30,849 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:59:30,864 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:59:30,910 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:59:30,910 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:59:30,910 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:59:30,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:59:30,911 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:59:30,911 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:59:30,911 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:59:30,911 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:59:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-27 14:59:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:59:30,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:30,945 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] [2020-10-27 14:59:30,946 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:30,956 INFO L82 PathProgramCache]: Analyzing trace with hash -597269868, now seen corresponding path program 1 times [2020-10-27 14:59:30,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:30,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983259798] [2020-10-27 14:59:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:31,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:31,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:31,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:31,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:31,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:32,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:59:32,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:59:32,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-27 14:59:32,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:32,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:32,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:59:32,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:32,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:59:32,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:32,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:32,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:32,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:32,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:32,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 14:59:32,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:32,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:32,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:32,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:32,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:59:32,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:59:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:32,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:32,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:32,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:32,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:32,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:32,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:59:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:32,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:32,162 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 14:59:32,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983259798] [2020-10-27 14:59:32,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:59:32,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:59:32,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837950554] [2020-10-27 14:59:32,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:59:32,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:32,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:59:32,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:59:32,191 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-27 14:59:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:32,320 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2020-10-27 14:59:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:59:32,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-27 14:59:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:32,330 INFO L225 Difference]: With dead ends: 64 [2020-10-27 14:59:32,331 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 14:59:32,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 14:59:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 14:59:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 14:59:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 14:59:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 14:59:32,382 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-27 14:59:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:32,383 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 14:59:32,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:59:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 14:59:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:59:32,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:32,385 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] [2020-10-27 14:59:32,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:59:32,385 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:32,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:32,386 INFO L82 PathProgramCache]: Analyzing trace with hash -339104430, now seen corresponding path program 1 times [2020-10-27 14:59:32,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:32,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591905379] [2020-10-27 14:59:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:32,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:32,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:32,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:32,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:33,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:33,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:59:33,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:59:33,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-27 14:59:33,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:33,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:59:33,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:59:33,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:59:33,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:33,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:33,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:33,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:33,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:33,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:33,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:59:33,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:33,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:33,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:33,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:33,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:33,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:59:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:33,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:33,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:33,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:33,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:33,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:59:33,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:59:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:59:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:33,341 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 14:59:33,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591905379] [2020-10-27 14:59:33,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:59:33,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 14:59:33,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194387891] [2020-10-27 14:59:33,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:59:33,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:33,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:59:33,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:59:33,346 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2020-10-27 14:59:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:33,889 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-27 14:59:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:59:33,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 14:59:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:33,892 INFO L225 Difference]: With dead ends: 49 [2020-10-27 14:59:33,893 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:59:33,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:59:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:59:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-27 14:59:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:59:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 14:59:33,907 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2020-10-27 14:59:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:33,908 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 14:59:33,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:59:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 14:59:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:59:33,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:33,909 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] [2020-10-27 14:59:33,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:59:33,910 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:33,910 INFO L82 PathProgramCache]: Analyzing trace with hash 205334388, now seen corresponding path program 1 times [2020-10-27 14:59:33,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:33,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224701893] [2020-10-27 14:59:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:33,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:33,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:34,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:34,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:59:34,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:59:34,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-27 14:59:34,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:59:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:59:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:59:34,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:34,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:34,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:34,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:34,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:34,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:34,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:59:34,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:34,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:34,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:59:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:34,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:34,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:34,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:34,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:34,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:59:34,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:34,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:34,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:34,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:59:34,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224701893] [2020-10-27 14:59:34,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:34,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:59:34,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126580398] [2020-10-27 14:59:34,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:59:34,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:34,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:59:34,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:59:34,581 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 9 states. [2020-10-27 14:59:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:34,977 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-27 14:59:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:59:34,978 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 14:59:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:34,979 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:59:34,979 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:59:34,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:59:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:59:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-27 14:59:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:59:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-27 14:59:34,992 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-10-27 14:59:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:34,992 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-27 14:59:34,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:59:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-27 14:59:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:59:34,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:34,994 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:59:34,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:59:34,994 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash -574971626, now seen corresponding path program 2 times [2020-10-27 14:59:34,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:34,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725306453] [2020-10-27 14:59:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:35,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:35,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:35,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:35,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:59:35,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:59:35,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-27 14:59:35,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:35,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:35,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:35,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:59:35,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:35,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:35,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:35,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:35,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:35,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:35,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:59:35,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:35,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:35,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:35,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:35,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:35,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:59:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:35,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:35,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:35,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:35,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:35,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:59:35,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:35,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:35,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:59:35,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:35,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:59:35,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725306453] [2020-10-27 14:59:35,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:59:35,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:59:35,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331937854] [2020-10-27 14:59:35,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:59:35,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:35,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:59:35,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:59:35,577 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 4 states. [2020-10-27 14:59:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:35,684 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-27 14:59:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:59:35,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 14:59:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:35,689 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:59:35,689 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:59:35,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 14:59:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:59:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 14:59:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:59:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-27 14:59:35,712 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 27 [2020-10-27 14:59:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:35,712 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-27 14:59:35,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:59:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-27 14:59:35,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:59:35,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:35,716 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:59:35,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:59:35,717 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:35,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1289633752, now seen corresponding path program 1 times [2020-10-27 14:59:35,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:35,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866727887] [2020-10-27 14:59:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:35,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:35,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:36,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:36,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:59:36,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:59:36,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-27 14:59:36,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:59:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:59:36,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:36,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:36,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:36,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:36,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:36,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:36,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:36,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:36,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:36,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 14:59:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:36,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:36,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:36,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:36,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:36,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:36,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:36,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:36,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:36,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:36,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:59:36,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866727887] [2020-10-27 14:59:36,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:36,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:59:36,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509620203] [2020-10-27 14:59:36,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:59:36,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:36,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:59:36,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:59:36,808 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 11 states. [2020-10-27 14:59:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:37,200 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-27 14:59:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:59:37,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 14:59:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:37,202 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:59:37,202 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:59:37,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:59:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:59:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-10-27 14:59:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:59:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-27 14:59:37,213 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2020-10-27 14:59:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:37,213 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-27 14:59:37,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:59:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-27 14:59:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:59:37,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:37,215 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:59:37,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:59:37,215 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash -47832477, now seen corresponding path program 1 times [2020-10-27 14:59:37,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:37,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035222426] [2020-10-27 14:59:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:37,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:37,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:37,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:39,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:39,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:59:39,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:59:39,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2098 [2020-10-27 14:59:39,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:39,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:59:39,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:39,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:59:39,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:39,853 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-10-27 14:59:40,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:40,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:40,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:40,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:59:40,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:40,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:40,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:59:40,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 14:59:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:40,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:40,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:40,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:40,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:40,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:59:40,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:40,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:40,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:40,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:59:40,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 14:59:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:40,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:40,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:40,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:40,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:40,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:59:40,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:40,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:59:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:59:40,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035222426] [2020-10-27 14:59:40,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:40,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:59:40,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704474321] [2020-10-27 14:59:40,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:59:40,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:40,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:59:40,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:59:40,331 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 14 states. [2020-10-27 14:59:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:41,512 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-10-27 14:59:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:59:41,515 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 14:59:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:41,516 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:59:41,516 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 14:59:41,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:59:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 14:59:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-27 14:59:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:59:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-27 14:59:41,531 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 35 [2020-10-27 14:59:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:41,531 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-27 14:59:41,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:59:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-27 14:59:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:59:41,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:41,534 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:59:41,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:59:41,534 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:41,535 INFO L82 PathProgramCache]: Analyzing trace with hash -369323643, now seen corresponding path program 2 times [2020-10-27 14:59:41,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:41,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845116722] [2020-10-27 14:59:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:42,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:42,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:59:42,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:59:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-27 14:59:42,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:59:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:59:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:59:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:42,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:42,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:42,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:42,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:42,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:59:42,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:42,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 14:59:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:42,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:42,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:42,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:42,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:42,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:59:42,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:42,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:42,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 14:59:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:42,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:42,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:42,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:42,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:42,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:42,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:42,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:59:42,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845116722] [2020-10-27 14:59:42,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:42,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:59:42,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763091865] [2020-10-27 14:59:42,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:59:42,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:42,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:59:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:59:42,455 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 11 states. [2020-10-27 14:59:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:43,289 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-10-27 14:59:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:59:43,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-27 14:59:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:43,293 INFO L225 Difference]: With dead ends: 85 [2020-10-27 14:59:43,294 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 14:59:43,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:59:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 14:59:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2020-10-27 14:59:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:59:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-27 14:59:43,324 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 37 [2020-10-27 14:59:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:43,325 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-27 14:59:43,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:59:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-27 14:59:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:59:43,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:43,331 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 14:59:43,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:59:43,331 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:43,332 INFO L82 PathProgramCache]: Analyzing trace with hash -84688857, now seen corresponding path program 3 times [2020-10-27 14:59:43,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:43,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231829070] [2020-10-27 14:59:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:43,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:43,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:59:44,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:59:44,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-27 14:59:44,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:59:44,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:44,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:59:44,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:44,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:59:44,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:44,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:44,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:44,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 14:59:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:44,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:44,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:44,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:59:44,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:44,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 14:59:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:44,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:59:44,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:44,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:59:44,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:44,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 14:59:44,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231829070] [2020-10-27 14:59:44,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:44,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:59:44,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668416908] [2020-10-27 14:59:44,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:59:44,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:44,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:59:44,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:59:44,208 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 5 states. [2020-10-27 14:59:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:44,375 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-27 14:59:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:59:44,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-27 14:59:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:44,378 INFO L225 Difference]: With dead ends: 98 [2020-10-27 14:59:44,378 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:59:44,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 14:59:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:59:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 14:59:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:59:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-27 14:59:44,403 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 39 [2020-10-27 14:59:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:44,405 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-27 14:59:44,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:59:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-27 14:59:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:59:44,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:44,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 14:59:44,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:59:44,410 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:44,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1793412073, now seen corresponding path program 4 times [2020-10-27 14:59:44,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:44,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957304459] [2020-10-27 14:59:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:46,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:48,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:48,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:59:48,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:59:48,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4021 [2020-10-27 14:59:48,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:48,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:59:48,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:48,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:59:48,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:48,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:48,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:48,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:48,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:48,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:48,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:48,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:48,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:48,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 14:59:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:48,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:48,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:48,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:48,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:48,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:48,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:48,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:48,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:48,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 14:59:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:48,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:48,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:48,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:48,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:48,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:59:48,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:59:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:48,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:59:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:59:48,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957304459] [2020-10-27 14:59:48,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:48,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:59:48,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631189077] [2020-10-27 14:59:48,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:59:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:59:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:59:48,640 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 9 states. [2020-10-27 14:59:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:49,043 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2020-10-27 14:59:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:59:49,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-27 14:59:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:49,045 INFO L225 Difference]: With dead ends: 127 [2020-10-27 14:59:49,045 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 14:59:49,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:59:49,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 14:59:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2020-10-27 14:59:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:59:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-27 14:59:49,089 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 41 [2020-10-27 14:59:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:49,089 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-27 14:59:49,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:59:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-27 14:59:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:59:49,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:49,096 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-27 14:59:49,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:59:49,096 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1532825813, now seen corresponding path program 5 times [2020-10-27 14:59:49,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:49,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111241954] [2020-10-27 14:59:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:49,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:49,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:49,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:49,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:52,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:52,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:53,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:54,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:54,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:59:54,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:59:54,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:59:54,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:59:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:54,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:59:54,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:54,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:54,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:54,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:54,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:54,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:54,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:54,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:54,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:54,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 14:59:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:54,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:54,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:54,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:54,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:54,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:59:54,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:54,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:59:54,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:59:54,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:54,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:54,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:59:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:54,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:54,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:54,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:54,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:54,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:59:54,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:59:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:54,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 14:59:54,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111241954] [2020-10-27 14:59:54,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:54,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:59:54,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866232614] [2020-10-27 14:59:54,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:59:54,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:54,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:59:54,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:59:54,567 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 11 states. [2020-10-27 14:59:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:55,321 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2020-10-27 14:59:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:59:55,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-27 14:59:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:55,329 INFO L225 Difference]: With dead ends: 154 [2020-10-27 14:59:55,329 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:59:55,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:59:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:59:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 76. [2020-10-27 14:59:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:59:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-27 14:59:55,357 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 43 [2020-10-27 14:59:55,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:55,357 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-27 14:59:55,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:59:55,357 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-27 14:59:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:59:55,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:55,361 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-27 14:59:55,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:59:55,361 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 256676818, now seen corresponding path program 6 times [2020-10-27 14:59:55,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:55,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345966109] [2020-10-27 14:59:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:55,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:55,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:55,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:56,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:59,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:59,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:59:59,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:59:59,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4564 [2020-10-27 14:59:59,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:59,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:59:59,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:59:59,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:59:59,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:00,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:00,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:00,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:00,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:00,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:00,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:00,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:00,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 15:00:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:00,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:00,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:00,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:00,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:00,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:00:00,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:00,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:00:00,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:00,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:00:00,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:00,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 15:00:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:00,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:00,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:00,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:00,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:00,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:00:00,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:00,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:00,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:00,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:00,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:00,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 15:00:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:00,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:00,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:00,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:00,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:00,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:00,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:00,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:00,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:00,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:00,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 15:00:00,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345966109] [2020-10-27 15:00:00,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:00,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 15:00:00,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243731270] [2020-10-27 15:00:00,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 15:00:00,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 15:00:00,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 15:00:00,239 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2020-10-27 15:00:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:01,094 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2020-10-27 15:00:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 15:00:01,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-27 15:00:01,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:01,096 INFO L225 Difference]: With dead ends: 111 [2020-10-27 15:00:01,096 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 15:00:01,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-27 15:00:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 15:00:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-10-27 15:00:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 15:00:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-27 15:00:01,127 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 45 [2020-10-27 15:00:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:01,127 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-27 15:00:01,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 15:00:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-27 15:00:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 15:00:01,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:01,128 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2020-10-27 15:00:01,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 15:00:01,129 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:01,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1703201261, now seen corresponding path program 7 times [2020-10-27 15:00:01,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:01,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447153201] [2020-10-27 15:00:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:01,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:01,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:01,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:02,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:02,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:06,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:06,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 15:00:06,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 15:00:06,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 15:00:06,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:06,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 15:00:06,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:06,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 15:00:06,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:06,374 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 25 [2020-10-27 15:00:06,544 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2020-10-27 15:00:06,692 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 25 [2020-10-27 15:00:06,834 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2020-10-27 15:00:06,977 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2020-10-27 15:00:07,123 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2020-10-27 15:00:07,263 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 22 [2020-10-27 15:00:07,508 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 59 [2020-10-27 15:00:07,736 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2020-10-27 15:00:08,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:08,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:08,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:08,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:08,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 15:00:08,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 15:00:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:08,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:00:08,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:08,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 15:00:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:08,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:08,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:08,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:08,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 15:00:08,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447153201] [2020-10-27 15:00:08,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:08,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 15:00:08,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321380660] [2020-10-27 15:00:08,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 15:00:08,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:08,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 15:00:08,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 15:00:08,278 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 18 states. [2020-10-27 15:00:08,871 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-27 15:00:09,790 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 15:00:09,958 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-27 15:00:10,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:10,668 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-10-27 15:00:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 15:00:10,669 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 15:00:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:10,671 INFO L225 Difference]: With dead ends: 108 [2020-10-27 15:00:10,671 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 15:00:10,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 15:00:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 15:00:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 69. [2020-10-27 15:00:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 15:00:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-10-27 15:00:10,692 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 45 [2020-10-27 15:00:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:10,692 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-10-27 15:00:10,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 15:00:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-10-27 15:00:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 15:00:10,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:10,693 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2020-10-27 15:00:10,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 15:00:10,694 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1968897071, now seen corresponding path program 8 times [2020-10-27 15:00:10,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:10,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47501989] [2020-10-27 15:00:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:10,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:10,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:11,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:13,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:13,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:14,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:15,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:15,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 15:00:15,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 15:00:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 15:00:15,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 15:00:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 15:00:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:16,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:16,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:16,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:16,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:16,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:16,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:16,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:16,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:16,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:00:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:16,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:16,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:16,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:16,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:16,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:00:16,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:16,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:16,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 15:00:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:16,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:16,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:16,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:16,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:16,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:16,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:16,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:16,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:16,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:16,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 15:00:16,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47501989] [2020-10-27 15:00:16,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:16,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 15:00:16,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481827701] [2020-10-27 15:00:16,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 15:00:16,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 15:00:16,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 15:00:16,331 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 13 states. [2020-10-27 15:00:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:17,110 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-10-27 15:00:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 15:00:17,114 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-27 15:00:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:17,116 INFO L225 Difference]: With dead ends: 83 [2020-10-27 15:00:17,116 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 15:00:17,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 15:00:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 15:00:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-10-27 15:00:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 15:00:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-27 15:00:17,136 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-27 15:00:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:17,137 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-27 15:00:17,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 15:00:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-27 15:00:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 15:00:17,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:17,138 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-27 15:00:17,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 15:00:17,138 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:17,139 INFO L82 PathProgramCache]: Analyzing trace with hash -563018888, now seen corresponding path program 9 times [2020-10-27 15:00:17,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:17,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469675532] [2020-10-27 15:00:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:17,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:17,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:17,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:18,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:22,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:22,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 15:00:22,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 15:00:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 15:00:22,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:22,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 15:00:22,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:22,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 15:00:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:22,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:22,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:22,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:22,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:22,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:22,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:22,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:22,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:22,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 15:00:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:22,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:22,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:22,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:22,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:22,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:22,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:22,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 15:00:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:22,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:22,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:22,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:22,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:22,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:22,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:22,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:22,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:22,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:22,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:22,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 15:00:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:22,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:22,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:22,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:22,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:22,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:22,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:22,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:22,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:22,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:22,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 15:00:22,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469675532] [2020-10-27 15:00:22,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:22,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 15:00:22,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857890052] [2020-10-27 15:00:22,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 15:00:22,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:22,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 15:00:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-27 15:00:22,863 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 18 states. [2020-10-27 15:00:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:24,353 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-27 15:00:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 15:00:24,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-27 15:00:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:24,355 INFO L225 Difference]: With dead ends: 90 [2020-10-27 15:00:24,355 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 15:00:24,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2020-10-27 15:00:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 15:00:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-27 15:00:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 15:00:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-27 15:00:24,377 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 51 [2020-10-27 15:00:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:24,377 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-27 15:00:24,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 15:00:24,377 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-27 15:00:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 15:00:24,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:24,379 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2020-10-27 15:00:24,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 15:00:24,379 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:24,380 INFO L82 PathProgramCache]: Analyzing trace with hash -793445318, now seen corresponding path program 10 times [2020-10-27 15:00:24,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:24,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642827479] [2020-10-27 15:00:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:24,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:24,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:24,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:24,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:25,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:25,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:25,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:25,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:26,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:29,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:29,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 15:00:29,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 15:00:29,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 15:00:29,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 15:00:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 15:00:29,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:29,823 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-10-27 15:00:30,026 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-10-27 15:00:30,228 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2020-10-27 15:00:30,432 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 28 [2020-10-27 15:00:30,661 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2020-10-27 15:00:30,866 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 28 [2020-10-27 15:00:31,174 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 43 [2020-10-27 15:00:31,382 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2020-10-27 15:00:31,566 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2020-10-27 15:00:31,754 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2020-10-27 15:00:31,947 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2020-10-27 15:00:32,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:32,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:32,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:32,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:32,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:32,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:32,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:32,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:32,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:32,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:32,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:32,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:00:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:32,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:32,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:32,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:32,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:32,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:32,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:32,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:32,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:32,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:32,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:32,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 15:00:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:32,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:32,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:32,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:32,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:32,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:00:32,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:32,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:32,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 15:00:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:32,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:32,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:32,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:32,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:32,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:00:32,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:32,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:32,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:32,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:32,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 15:00:32,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642827479] [2020-10-27 15:00:32,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:32,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 15:00:32,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107789290] [2020-10-27 15:00:32,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 15:00:32,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:32,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 15:00:32,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-27 15:00:32,335 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 20 states. [2020-10-27 15:00:33,115 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-27 15:00:33,475 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-27 15:00:33,721 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-27 15:00:33,899 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-27 15:00:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:34,334 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2020-10-27 15:00:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 15:00:34,335 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-27 15:00:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:34,338 INFO L225 Difference]: With dead ends: 112 [2020-10-27 15:00:34,338 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 15:00:34,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2020-10-27 15:00:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 15:00:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-27 15:00:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 15:00:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-10-27 15:00:34,371 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 53 [2020-10-27 15:00:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:34,371 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-10-27 15:00:34,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 15:00:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-10-27 15:00:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 15:00:34,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:34,372 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2020-10-27 15:00:34,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 15:00:34,372 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1105054844, now seen corresponding path program 11 times [2020-10-27 15:00:34,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:34,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418464709] [2020-10-27 15:00:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:34,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:35,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:35,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:37,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:37,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:39,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:39,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 15:00:39,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 15:00:39,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 15:00:39,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:39,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 15:00:39,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:39,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 15:00:39,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:39,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:39,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:39,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:39,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:39,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:39,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:00:39,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:39,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:39,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:39,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:39,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:39,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 15:00:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:39,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:39,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:39,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:39,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:39,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:39,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:39,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:39,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 15:00:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:39,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:39,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:39,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:39,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:00:39,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:39,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:39,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 15:00:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:39,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:39,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 15:00:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:39,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:39,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:39,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:39,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:39,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:00:39,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 15:00:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:39,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 15:00:39,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418464709] [2020-10-27 15:00:39,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:39,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 15:00:39,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250937691] [2020-10-27 15:00:39,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 15:00:39,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 15:00:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 15:00:39,636 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 13 states. [2020-10-27 15:00:40,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:40,704 INFO L93 Difference]: Finished difference Result 230 states and 251 transitions. [2020-10-27 15:00:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 15:00:40,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-27 15:00:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:40,707 INFO L225 Difference]: With dead ends: 230 [2020-10-27 15:00:40,707 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 15:00:40,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-27 15:00:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 15:00:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 132. [2020-10-27 15:00:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 15:00:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2020-10-27 15:00:40,745 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 55 [2020-10-27 15:00:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:40,745 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2020-10-27 15:00:40,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 15:00:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2020-10-27 15:00:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 15:00:40,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:40,747 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 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] [2020-10-27 15:00:40,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 15:00:40,747 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:40,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1165282974, now seen corresponding path program 12 times [2020-10-27 15:00:40,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:40,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304032115] [2020-10-27 15:00:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:40,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:40,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:40,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:41,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:45,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:45,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 15:00:45,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 15:00:45,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 15:00:45,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 15:00:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 15:00:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 15:00:45,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:46,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:46,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:46,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:46,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:46,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:46,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:46,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:46,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:46,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:46,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:46,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 15:00:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:46,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:46,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:46,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:46,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:46,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:00:46,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:46,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:46,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 15:00:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:46,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:46,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:46,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:46,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:46,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:46,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:46,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:46,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 15:00:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:46,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:46,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:46,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:46,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:46,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:46,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:46,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:46,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:46,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:46,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 15:00:46,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304032115] [2020-10-27 15:00:46,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:46,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 15:00:46,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532034077] [2020-10-27 15:00:46,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 15:00:46,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:46,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 15:00:46,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 15:00:46,100 INFO L87 Difference]: Start difference. First operand 132 states and 143 transitions. Second operand 13 states. [2020-10-27 15:00:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:47,007 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2020-10-27 15:00:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 15:00:47,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-27 15:00:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:47,009 INFO L225 Difference]: With dead ends: 203 [2020-10-27 15:00:47,010 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 15:00:47,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-27 15:00:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 15:00:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 149. [2020-10-27 15:00:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 15:00:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2020-10-27 15:00:47,048 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 57 [2020-10-27 15:00:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:47,048 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2020-10-27 15:00:47,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 15:00:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2020-10-27 15:00:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 15:00:47,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:47,049 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:47,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 15:00:47,050 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1797147355, now seen corresponding path program 13 times [2020-10-27 15:00:47,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:47,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199178669] [2020-10-27 15:00:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:47,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:47,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:47,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:48,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:48,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 15:00:48,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:00:48,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-27 15:00:48,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 15:00:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 15:00:48,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:48,576 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 23 [2020-10-27 15:00:48,722 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-27 15:00:48,900 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-27 15:00:49,064 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-10-27 15:00:49,230 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-27 15:00:49,369 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2020-10-27 15:00:49,530 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-27 15:00:49,681 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-27 15:00:49,844 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-27 15:00:50,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:50,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:50,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:50,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:50,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:50,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:50,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:50,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:50,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:50,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:50,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:50,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 15:00:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:50,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:50,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:50,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:50,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:50,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:50,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:50,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 15:00:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:50,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:50,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:50,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:50,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:50,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:50,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 15:00:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:50,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:50,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:50,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:50,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:50,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:00:50,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:50,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:50,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:50,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:50,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:50,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 15:00:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:50,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:50,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:50,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:50,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:50,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:00:50,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:50,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:50,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:50,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:50,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 15:00:50,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199178669] [2020-10-27 15:00:50,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:50,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 15:00:50,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593782505] [2020-10-27 15:00:50,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 15:00:50,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:50,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 15:00:50,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:00:50,237 INFO L87 Difference]: Start difference. First operand 149 states and 163 transitions. Second operand 17 states. [2020-10-27 15:00:50,627 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-27 15:00:50,867 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-27 15:00:51,149 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-27 15:00:51,363 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-27 15:00:51,574 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-27 15:00:52,175 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 52 [2020-10-27 15:00:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:53,105 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2020-10-27 15:00:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 15:00:53,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-27 15:00:53,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:53,109 INFO L225 Difference]: With dead ends: 167 [2020-10-27 15:00:53,109 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 15:00:53,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2020-10-27 15:00:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 15:00:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-10-27 15:00:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 15:00:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2020-10-27 15:00:53,159 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 59 [2020-10-27 15:00:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:53,160 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2020-10-27 15:00:53,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 15:00:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2020-10-27 15:00:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 15:00:53,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:53,166 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 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] [2020-10-27 15:00:53,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 15:00:53,169 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:53,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:53,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1085026240, now seen corresponding path program 14 times [2020-10-27 15:00:53,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:53,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009315751] [2020-10-27 15:00:53,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:53,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:53,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:53,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:54,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:54,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:58,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:58,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 15:00:58,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 15:00:58,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 15:00:58,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:58,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 15:00:58,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:58,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 15:00:58,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:58,645 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 15:00:58,952 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-27 15:00:59,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:59,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:59,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:59,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:59,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:59,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:59,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:59,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:59,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 15:00:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:59,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:59,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:59,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:59,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:59,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:59,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:59,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:59,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:59,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:59,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:59,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 15:00:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:59,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:59,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:59,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:59,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:59,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:00:59,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:59,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:59,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:59,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:59,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:59,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 15:00:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:59,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:59,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:59,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:59,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:59,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:59,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:59,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:59,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:59,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:59,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 15:00:59,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009315751] [2020-10-27 15:00:59,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:59,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 15:00:59,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605785460] [2020-10-27 15:00:59,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 15:00:59,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:59,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 15:00:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-27 15:00:59,318 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand 21 states. [2020-10-27 15:01:00,352 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 15:01:00,654 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-27 15:01:00,955 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 15:01:01,093 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 15:01:01,261 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-10-27 15:01:01,431 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-27 15:01:01,750 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-10-27 15:01:02,046 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 15:01:02,354 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-27 15:01:02,701 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-27 15:01:02,888 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-27 15:01:03,267 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-27 15:01:03,832 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-27 15:01:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:04,700 INFO L93 Difference]: Finished difference Result 254 states and 282 transitions. [2020-10-27 15:01:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 15:01:04,701 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 15:01:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:04,703 INFO L225 Difference]: With dead ends: 254 [2020-10-27 15:01:04,703 INFO L226 Difference]: Without dead ends: 251 [2020-10-27 15:01:04,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 15:01:04,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-27 15:01:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2020-10-27 15:01:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 15:01:04,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 194 transitions. [2020-10-27 15:01:04,743 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 194 transitions. Word has length 59 [2020-10-27 15:01:04,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:04,744 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 194 transitions. [2020-10-27 15:01:04,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 15:01:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 194 transitions. [2020-10-27 15:01:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 15:01:04,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:04,745 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-27 15:01:04,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 15:01:04,745 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:04,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:04,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1631934905, now seen corresponding path program 15 times [2020-10-27 15:01:04,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:04,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318461797] [2020-10-27 15:01:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:04,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:05,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:05,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:06,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4015 [2020-10-27 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 15:01:08,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:09,328 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 27 [2020-10-27 15:01:09,474 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2020-10-27 15:01:09,602 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2020-10-27 15:01:10,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:10,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:10,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:10,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:10,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:01:10,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:10,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 15:01:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:10,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:10,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:10,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:10,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:10,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:01:10,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 15:01:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:01:10,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:10,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 15:01:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:10,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:10,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:10,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:10,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:10,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:10,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:10,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 15:01:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:10,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:10,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:10,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:10,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:10,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:10,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-27 15:01:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:10,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:10,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:10,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:10,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:10,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:10,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:10,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:10,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:10,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:10,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 15:01:10,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318461797] [2020-10-27 15:01:10,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:10,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 15:01:10,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322517122] [2020-10-27 15:01:10,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 15:01:10,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:10,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 15:01:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-27 15:01:10,193 INFO L87 Difference]: Start difference. First operand 177 states and 194 transitions. Second operand 20 states. [2020-10-27 15:01:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:13,223 INFO L93 Difference]: Finished difference Result 246 states and 277 transitions. [2020-10-27 15:01:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 15:01:13,224 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-10-27 15:01:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:13,226 INFO L225 Difference]: With dead ends: 246 [2020-10-27 15:01:13,226 INFO L226 Difference]: Without dead ends: 243 [2020-10-27 15:01:13,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 15:01:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-27 15:01:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2020-10-27 15:01:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 15:01:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 241 transitions. [2020-10-27 15:01:13,295 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 241 transitions. Word has length 61 [2020-10-27 15:01:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:13,295 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 241 transitions. [2020-10-27 15:01:13,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 15:01:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 241 transitions. [2020-10-27 15:01:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 15:01:13,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:13,297 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 3, 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] [2020-10-27 15:01:13,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 15:01:13,297 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:13,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1711007490, now seen corresponding path program 16 times [2020-10-27 15:01:13,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:13,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402146538] [2020-10-27 15:01:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:13,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:13,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:15,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:15,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:15,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:15,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:18,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:18,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 15:01:18,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 15:01:18,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 15:01:18,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 15:01:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:01:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 15:01:18,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:19,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:19,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:19,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:19,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:19,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:19,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:19,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:19,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:19,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:19,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:19,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:19,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 15:01:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:19,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:19,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:19,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:19,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:19,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:19,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:19,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:19,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 15:01:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:19,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:19,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:19,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:19,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:19,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:19,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:19,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:19,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-27 15:01:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:19,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:19,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:19,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:19,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:19,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:19,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:19,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:19,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:19,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:19,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-27 15:01:19,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402146538] [2020-10-27 15:01:19,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:19,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 15:01:19,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298806825] [2020-10-27 15:01:19,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 15:01:19,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:19,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 15:01:19,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 15:01:19,137 INFO L87 Difference]: Start difference. First operand 215 states and 241 transitions. Second operand 15 states. [2020-10-27 15:01:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:20,355 INFO L93 Difference]: Finished difference Result 238 states and 264 transitions. [2020-10-27 15:01:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 15:01:20,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-27 15:01:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:20,359 INFO L225 Difference]: With dead ends: 238 [2020-10-27 15:01:20,360 INFO L226 Difference]: Without dead ends: 235 [2020-10-27 15:01:20,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-27 15:01:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-27 15:01:20,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2020-10-27 15:01:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 15:01:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 257 transitions. [2020-10-27 15:01:20,422 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 257 transitions. Word has length 61 [2020-10-27 15:01:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:20,423 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 257 transitions. [2020-10-27 15:01:20,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 15:01:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 257 transitions. [2020-10-27 15:01:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 15:01:20,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:20,425 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2020-10-27 15:01:20,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 15:01:20,425 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:20,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:20,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1776560407, now seen corresponding path program 17 times [2020-10-27 15:01:20,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:20,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708919288] [2020-10-27 15:01:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:20,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:21,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:21,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:25,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:25,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 15:01:25,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 15:01:25,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 15:01:25,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:25,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 15:01:25,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 15:01:25,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 15:01:25,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:25,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:25,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:25,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:25,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:25,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:25,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:25,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:25,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:25,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:25,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:25,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:25,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 15:01:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:25,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:25,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:25,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:25,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:25,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:01:25,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:25,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:25,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:25,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:25,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:25,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 15:01:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:25,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:25,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:25,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:25,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:25,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:25,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:25,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:25,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 15:01:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:25,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:25,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:25,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:25,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:25,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:25,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:25,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:25,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-27 15:01:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:25,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:25,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:25,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:25,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:25,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:01:25,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:25,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:25,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:25,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:25,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 15:01:25,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708919288] [2020-10-27 15:01:25,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:25,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 15:01:25,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611282819] [2020-10-27 15:01:25,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 15:01:25,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:25,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 15:01:25,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 15:01:25,847 INFO L87 Difference]: Start difference. First operand 231 states and 257 transitions. Second operand 15 states. [2020-10-27 15:01:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:27,281 INFO L93 Difference]: Finished difference Result 315 states and 359 transitions. [2020-10-27 15:01:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 15:01:27,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-27 15:01:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:27,288 INFO L225 Difference]: With dead ends: 315 [2020-10-27 15:01:27,288 INFO L226 Difference]: Without dead ends: 312 [2020-10-27 15:01:27,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2020-10-27 15:01:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-27 15:01:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 206. [2020-10-27 15:01:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-27 15:01:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2020-10-27 15:01:27,357 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 63 [2020-10-27 15:01:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:27,358 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2020-10-27 15:01:27,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 15:01:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2020-10-27 15:01:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 15:01:27,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:27,359 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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] [2020-10-27 15:01:27,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 15:01:27,360 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:27,360 INFO L82 PathProgramCache]: Analyzing trace with hash 972252939, now seen corresponding path program 18 times [2020-10-27 15:01:27,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:27,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261830348] [2020-10-27 15:01:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:27,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:27,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:28,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:29,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:30,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:32,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:32,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 15:01:32,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 15:01:32,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 15:01:32,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:32,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 15:01:32,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:01:32,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 15:01:32,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:32,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:32,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:32,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:32,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:32,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:32,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:01:32,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:32,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:32,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 15:01:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:32,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:32,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:32,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:32,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:01:32,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:32,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:32,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 15:01:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:32,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:32,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:32,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:32,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:32,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:01:32,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:32,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:32,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 15:01:32,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:32,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:32,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 15:01:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:32,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:32,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:32,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:32,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:32,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 15:01:32,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 15:01:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:32,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:32,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-27 15:01:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:32,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:32,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:32,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:32,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 15:01:32,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:32,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:32,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 15:01:32,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:32,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-27 15:01:32,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261830348] [2020-10-27 15:01:32,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:32,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 15:01:32,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243207401] [2020-10-27 15:01:32,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 15:01:32,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:32,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 15:01:32,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-27 15:01:32,607 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand 13 states. [2020-10-27 15:01:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:33,298 INFO L93 Difference]: Finished difference Result 276 states and 303 transitions. [2020-10-27 15:01:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 15:01:33,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-27 15:01:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:33,300 INFO L225 Difference]: With dead ends: 276 [2020-10-27 15:01:33,300 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 15:01:33,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-27 15:01:33,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 15:01:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-10-27 15:01:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-27 15:01:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 227 transitions. [2020-10-27 15:01:33,351 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 227 transitions. Word has length 65 [2020-10-27 15:01:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:33,352 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 227 transitions. [2020-10-27 15:01:33,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 15:01:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 227 transitions. [2020-10-27 15:01:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 15:01:33,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:33,354 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-10-27 15:01:33,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 15:01:33,354 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:33,354 INFO L82 PathProgramCache]: Analyzing trace with hash 573301837, now seen corresponding path program 19 times [2020-10-27 15:01:33,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:33,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490840496] [2020-10-27 15:01:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:33,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:33,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:33,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:33,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:33,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:37,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:38,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:38,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 15:01:38,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 15:01:38,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 15:01:38,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 15:01:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:01:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 15:01:38,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:39,021 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-27 15:01:39,284 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-27 15:01:39,617 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-27 15:01:39,820 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-27 15:01:40,026 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-27 15:01:40,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:40,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:40,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:40,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:40,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:40,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:01:40,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:40,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:40,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:40,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:40,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:40,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 15:01:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:40,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:40,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:40,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:40,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:40,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:01:40,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:40,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:40,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:40,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:40,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:40,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 15:01:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:40,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:40,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:40,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:40,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 15:01:40,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:40,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:40,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:40,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:40,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:40,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 15:01:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:40,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:40,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:40,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:40,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:40,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 15:01:40,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:40,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:40,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 15:01:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:40,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:40,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:40,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:01:40,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:40,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:01:40,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:40,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:01:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:01:40,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 15:01:40,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490840496] [2020-10-27 15:01:40,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:40,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 15:01:40,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312611820] [2020-10-27 15:01:40,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 15:01:40,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:40,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 15:01:40,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 15:01:40,441 INFO L87 Difference]: Start difference. First operand 206 states and 227 transitions. Second operand 22 states. [2020-10-27 15:01:41,128 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 121 [2020-10-27 15:01:41,775 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 121 [2020-10-27 15:01:42,446 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-27 15:01:42,792 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2020-10-27 15:01:43,281 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 108 [2020-10-27 15:01:44,174 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 129 [2020-10-27 15:01:44,372 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-27 15:01:44,849 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-10-27 15:01:45,402 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 84 [2020-10-27 15:01:46,171 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 103 [2020-10-27 15:01:46,594 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 75 [2020-10-27 15:01:47,375 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 106 [2020-10-27 15:01:48,038 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2020-10-27 15:01:48,727 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 111 [2020-10-27 15:01:49,423 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 95 [2020-10-27 15:01:49,885 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-10-27 15:01:50,764 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 99 [2020-10-27 15:01:51,336 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-27 15:01:51,769 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2020-10-27 15:01:52,081 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-10-27 15:01:52,654 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-27 15:01:52,995 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-27 15:01:53,286 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-27 15:01:53,708 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-27 15:01:54,008 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-27 15:01:54,366 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-27 15:01:54,639 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-27 15:01:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:54,827 INFO L93 Difference]: Finished difference Result 279 states and 307 transitions. [2020-10-27 15:01:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 15:01:54,831 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-10-27 15:01:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:54,832 INFO L225 Difference]: With dead ends: 279 [2020-10-27 15:01:54,833 INFO L226 Difference]: Without dead ends: 276 [2020-10-27 15:01:54,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 15:01:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-27 15:01:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 227. [2020-10-27 15:01:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 15:01:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 246 transitions. [2020-10-27 15:01:54,897 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 246 transitions. Word has length 67 [2020-10-27 15:01:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:54,898 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 246 transitions. [2020-10-27 15:01:54,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 15:01:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 246 transitions. [2020-10-27 15:01:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 15:01:54,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:54,899 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 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] [2020-10-27 15:01:54,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 15:01:54,899 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash -566617841, now seen corresponding path program 20 times [2020-10-27 15:01:54,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:54,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535458665] [2020-10-27 15:01:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:54,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:55,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:55,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:55,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:55,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:56,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:57,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:57,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:57,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:59,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:59,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 15:01:59,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 15:01:59,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 15:01:59,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:59,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 15:01:59,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:01:59,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 15:01:59,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:00,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:00,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:00,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:00,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:00,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:02:00,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:00,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:00,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:00,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:00,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:00,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 15:02:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:00,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:00,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:00,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:00,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:00,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:00,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:00,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:00,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 15:02:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:00,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:00,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:00,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:00,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:02:00,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 15:02:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:00,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:00,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-27 15:02:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:00,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:00,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:00,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:00,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:00,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 15:02:00,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 15:02:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:00,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 15:02:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:00,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:00,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:00,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:00,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:00,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 15:02:00,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:00,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:00,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 15:02:00,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:00,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-27 15:02:00,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535458665] [2020-10-27 15:02:00,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:00,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 15:02:00,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111213244] [2020-10-27 15:02:00,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 15:02:00,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 15:02:00,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 15:02:00,167 INFO L87 Difference]: Start difference. First operand 227 states and 246 transitions. Second operand 15 states. [2020-10-27 15:02:01,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:01,266 INFO L93 Difference]: Finished difference Result 451 states and 494 transitions. [2020-10-27 15:02:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 15:02:01,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-27 15:02:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:01,270 INFO L225 Difference]: With dead ends: 451 [2020-10-27 15:02:01,270 INFO L226 Difference]: Without dead ends: 341 [2020-10-27 15:02:01,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2020-10-27 15:02:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-27 15:02:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 282. [2020-10-27 15:02:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-27 15:02:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 302 transitions. [2020-10-27 15:02:01,367 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 302 transitions. Word has length 69 [2020-10-27 15:02:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:01,367 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 302 transitions. [2020-10-27 15:02:01,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 15:02:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 302 transitions. [2020-10-27 15:02:01,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 15:02:01,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:01,369 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 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] [2020-10-27 15:02:01,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 15:02:01,369 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:01,370 INFO L82 PathProgramCache]: Analyzing trace with hash -812767919, now seen corresponding path program 21 times [2020-10-27 15:02:01,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:01,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044797057] [2020-10-27 15:02:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:01,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:01,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:01,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:01,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:03,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:03,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:03,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:03,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:03,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:04,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:05,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:06,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:06,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 15:02:06,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 15:02:06,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 15:02:06,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:06,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 15:02:06,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:02:06,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 15:02:06,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:06,603 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 21 [2020-10-27 15:02:06,757 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 23 [2020-10-27 15:02:06,910 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2020-10-27 15:02:07,528 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2020-10-27 15:02:07,670 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 24 [2020-10-27 15:02:08,167 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 37 [2020-10-27 15:02:08,370 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2020-10-27 15:02:09,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:09,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:09,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:09,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:09,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:09,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:09,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:09,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:09,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:09,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:09,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:09,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 15:02:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:09,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:09,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:09,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:09,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:09,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:02:09,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:09,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:09,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:09,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:09,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:09,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 15:02:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:09,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:09,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:09,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:09,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:09,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:09,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:09,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:09,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:09,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:09,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:09,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-27 15:02:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:09,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:09,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:09,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:09,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:09,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:02:09,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:09,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:09,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 15:02:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:09,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:09,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:09,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:09,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:09,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:09,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:09,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 15:02:09,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044797057] [2020-10-27 15:02:09,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:09,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 15:02:09,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305952248] [2020-10-27 15:02:09,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 15:02:09,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:09,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 15:02:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-27 15:02:09,100 INFO L87 Difference]: Start difference. First operand 282 states and 302 transitions. Second operand 24 states. [2020-10-27 15:02:11,471 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2020-10-27 15:02:11,672 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-27 15:02:11,942 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-27 15:02:13,204 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-27 15:02:13,369 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-27 15:02:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:14,934 INFO L93 Difference]: Finished difference Result 433 states and 471 transitions. [2020-10-27 15:02:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 15:02:14,935 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-10-27 15:02:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:14,938 INFO L225 Difference]: With dead ends: 433 [2020-10-27 15:02:14,939 INFO L226 Difference]: Without dead ends: 299 [2020-10-27 15:02:14,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 15:02:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-27 15:02:15,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 217. [2020-10-27 15:02:15,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 15:02:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 231 transitions. [2020-10-27 15:02:15,017 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 231 transitions. Word has length 71 [2020-10-27 15:02:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:15,018 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 231 transitions. [2020-10-27 15:02:15,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 15:02:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 231 transitions. [2020-10-27 15:02:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 15:02:15,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:15,021 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:02:15,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 15:02:15,021 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:15,022 INFO L82 PathProgramCache]: Analyzing trace with hash 194324728, now seen corresponding path program 22 times [2020-10-27 15:02:15,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:15,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738735901] [2020-10-27 15:02:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:15,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:15,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:15,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:15,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:15,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:17,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:18,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:20,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:20,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 15:02:20,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 15:02:20,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 15:02:20,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 15:02:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:02:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 15:02:20,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:21,171 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2020-10-27 15:02:21,310 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2020-10-27 15:02:21,488 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 33 [2020-10-27 15:02:21,641 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-10-27 15:02:21,814 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-27 15:02:21,987 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-27 15:02:22,166 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-27 15:02:22,360 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2020-10-27 15:02:22,527 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2020-10-27 15:02:22,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:22,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:22,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:22,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:22,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:22,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:22,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:22,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:22,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 15:02:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:22,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:22,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:22,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:22,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:22,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:02:22,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:22,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:22,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 15:02:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:22,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:22,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:22,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:22,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:22,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:02:22,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:22,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:22,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:22,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:22,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:22,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 15:02:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:22,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:22,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:22,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:22,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:22,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:02:22,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:22,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:22,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:22,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:22,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-27 15:02:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:22,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:22,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:22,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:22,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:22,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:02:22,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:22,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:22,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:22,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:22,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:22,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-27 15:02:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:22,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:22,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:22,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:22,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:22,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:02:22,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:22,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:22,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:22,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:22,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 73 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 15:02:22,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738735901] [2020-10-27 15:02:22,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:22,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 15:02:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549759258] [2020-10-27 15:02:22,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 15:02:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 15:02:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-10-27 15:02:22,825 INFO L87 Difference]: Start difference. First operand 217 states and 231 transitions. Second operand 24 states. [2020-10-27 15:02:24,133 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-27 15:02:24,327 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-10-27 15:02:24,627 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2020-10-27 15:02:24,821 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-27 15:02:25,089 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-27 15:02:25,324 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-27 15:02:25,544 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-27 15:02:25,790 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-27 15:02:26,104 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 15:02:26,439 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-27 15:02:26,930 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-10-27 15:02:27,290 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-27 15:02:27,815 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-27 15:02:28,297 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-10-27 15:02:28,666 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-27 15:02:29,071 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-10-27 15:02:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:29,108 INFO L93 Difference]: Finished difference Result 264 states and 283 transitions. [2020-10-27 15:02:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 15:02:29,109 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 73 [2020-10-27 15:02:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:29,111 INFO L225 Difference]: With dead ends: 264 [2020-10-27 15:02:29,111 INFO L226 Difference]: Without dead ends: 215 [2020-10-27 15:02:29,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=448, Invalid=2002, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 15:02:29,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-27 15:02:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2020-10-27 15:02:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 15:02:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 227 transitions. [2020-10-27 15:02:29,181 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 227 transitions. Word has length 73 [2020-10-27 15:02:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:29,182 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 227 transitions. [2020-10-27 15:02:29,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 15:02:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 227 transitions. [2020-10-27 15:02:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 15:02:29,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:29,183 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:02:29,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 15:02:29,184 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash 705307007, now seen corresponding path program 23 times [2020-10-27 15:02:29,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:29,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881753497] [2020-10-27 15:02:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:29,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:29,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:29,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:30,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:34,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:34,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 15:02:34,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 15:02:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 15:02:34,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 15:02:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 15:02:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 15:02:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:34,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:34,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:34,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:34,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:34,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:34,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:34,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:34,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:34,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:34,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:34,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:34,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 15:02:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:34,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:34,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:34,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:34,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:34,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:02:34,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:34,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:34,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:34,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:34,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:34,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 15:02:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:34,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:34,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:34,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:34,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:34,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:02:34,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:34,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:34,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 15:02:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:34,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:34,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:34,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:34,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:34,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:02:34,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:34,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:34,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:34,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:34,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:34,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 15:02:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:34,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:34,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:34,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:34,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:34,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:02:34,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:34,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:34,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:34,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:34,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 15:02:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:34,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:34,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:34,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:34,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:02:34,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:34,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:34,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 15:02:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:34,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:34,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:34,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:34,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:34,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:02:34,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:34,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-27 15:02:34,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881753497] [2020-10-27 15:02:34,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:34,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 15:02:34,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674521013] [2020-10-27 15:02:34,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 15:02:34,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:34,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 15:02:34,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-27 15:02:34,419 INFO L87 Difference]: Start difference. First operand 215 states and 227 transitions. Second operand 13 states. [2020-10-27 15:02:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:35,096 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2020-10-27 15:02:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 15:02:35,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-10-27 15:02:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:35,099 INFO L225 Difference]: With dead ends: 220 [2020-10-27 15:02:35,099 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 15:02:35,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-27 15:02:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 15:02:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-10-27 15:02:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 15:02:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2020-10-27 15:02:35,146 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 75 [2020-10-27 15:02:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:35,146 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2020-10-27 15:02:35,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 15:02:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2020-10-27 15:02:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 15:02:35,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:35,148 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 4, 4, 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] [2020-10-27 15:02:35,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 15:02:35,148 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:35,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:35,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1139791597, now seen corresponding path program 24 times [2020-10-27 15:02:35,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:35,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240236548] [2020-10-27 15:02:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:35,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:35,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:35,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:36,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:36,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:36,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:36,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:37,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:38,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:40,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:40,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 15:02:40,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 15:02:40,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 15:02:40,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 15:02:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:02:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 15:02:40,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:40,653 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2020-10-27 15:02:40,765 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 22 [2020-10-27 15:02:40,897 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2020-10-27 15:02:41,028 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 22 [2020-10-27 15:02:41,166 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 22 [2020-10-27 15:02:41,304 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 22 [2020-10-27 15:02:41,451 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 22 [2020-10-27 15:02:41,607 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 22 [2020-10-27 15:02:41,767 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 22 [2020-10-27 15:02:41,911 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2020-10-27 15:02:42,075 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 20 [2020-10-27 15:02:42,299 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2020-10-27 15:02:42,643 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 51 [2020-10-27 15:02:42,980 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 57 [2020-10-27 15:02:43,445 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 74 [2020-10-27 15:02:43,879 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 59 [2020-10-27 15:02:44,585 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 76 [2020-10-27 15:02:45,406 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 78 [2020-10-27 15:02:46,271 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 72 [2020-10-27 15:02:46,515 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2020-10-27 15:02:46,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:46,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:46,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:46,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:46,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:46,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:02:46,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:46,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:46,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-27 15:02:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:46,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:46,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:46,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:46,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:46,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 15:02:46,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:46,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 15:02:46,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:46,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:02:46,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:47,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 15:02:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:47,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:47,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:47,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:47,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:47,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 15:02:47,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:47,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:47,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:47,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:47,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:47,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-27 15:02:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:47,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:47,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:47,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:47,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:47,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 15:02:47,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:47,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:47,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:47,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:47,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:47,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-27 15:02:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:47,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:47,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:47,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:02:47,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:47,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 15:02:47,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:02:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:47,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:02:47,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 13 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 15:02:47,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240236548] [2020-10-27 15:02:47,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:47,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 15:02:47,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313020927] [2020-10-27 15:02:47,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 15:02:47,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:47,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 15:02:47,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2020-10-27 15:02:47,210 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand 28 states. [2020-10-27 15:02:49,019 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 43 [2020-10-27 15:02:49,370 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 45 [2020-10-27 15:02:49,917 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-27 15:02:50,527 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2020-10-27 15:02:50,956 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-27 15:02:51,671 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-27 15:02:52,872 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2020-10-27 15:02:53,361 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 86 [2020-10-27 15:02:54,104 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 90 [2020-10-27 15:02:54,809 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2020-10-27 15:02:55,618 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 99 [2020-10-27 15:02:56,235 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-27 15:02:56,559 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-27 15:02:57,290 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-27 15:02:57,677 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-27 15:02:58,451 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-27 15:02:59,276 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-10-27 15:03:00,603 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 121 DAG size of output: 110 [2020-10-27 15:03:01,065 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-27 15:03:01,441 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-27 15:03:01,804 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-27 15:03:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:03:01,808 INFO L93 Difference]: Finished difference Result 238 states and 264 transitions. [2020-10-27 15:03:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 15:03:01,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2020-10-27 15:03:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:03:01,812 INFO L225 Difference]: With dead ends: 238 [2020-10-27 15:03:01,812 INFO L226 Difference]: Without dead ends: 235 [2020-10-27 15:03:01,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=646, Invalid=3014, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 15:03:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-27 15:03:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2020-10-27 15:03:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-27 15:03:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 212 transitions. [2020-10-27 15:03:01,868 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 212 transitions. Word has length 73 [2020-10-27 15:03:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:03:01,868 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 212 transitions. [2020-10-27 15:03:01,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 15:03:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 212 transitions. [2020-10-27 15:03:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 15:03:01,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:03:01,870 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:03:01,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 15:03:01,870 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:03:01,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:03:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash -542817222, now seen corresponding path program 25 times [2020-10-27 15:03:01,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:03:01,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768755366] [2020-10-27 15:03:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:03:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:01,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:01,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:02,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:02,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:03,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:04,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:05,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:05,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:05,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:05,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:06,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:06,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:06,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 15:03:06,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 15:03:06,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 15:03:06,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 15:03:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:03:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 15:03:06,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:08,035 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2020-10-27 15:03:08,225 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-10-27 15:03:08,475 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2020-10-27 15:03:08,690 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2020-10-27 15:03:08,891 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 31 [2020-10-27 15:03:09,152 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2020-10-27 15:03:09,413 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2020-10-27 15:03:09,689 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2020-10-27 15:03:09,958 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2020-10-27 15:03:10,186 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2020-10-27 15:03:10,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:03:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:10,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:10,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:10,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:03:10,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:10,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:03:10,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:10,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:03:10,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:10,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:03:10,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:10,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 15:03:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:10,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:10,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:10,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:03:10,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:10,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:03:10,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 15:03:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:10,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:03:10,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:10,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 15:03:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:10,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:10,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:10,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:03:10,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:10,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:03:10,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:03:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:03:10,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:10,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 15:03:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:10,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:10,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:10,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:03:10,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:10,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:03:10,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:10,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:03:10,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:10,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:03:10,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:10,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 15:03:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:10,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:10,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:10,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:03:10,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:10,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:03:10,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:03:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:03:10,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:10,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 15:03:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:10,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:10,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:10,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:03:10,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:10,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:03:10,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:03:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:03:10,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 90 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 15:03:10,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768755366] [2020-10-27 15:03:10,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:03:10,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 15:03:10,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102220827] [2020-10-27 15:03:10,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 15:03:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:03:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 15:03:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2020-10-27 15:03:10,627 INFO L87 Difference]: Start difference. First operand 193 states and 212 transitions. Second operand 27 states. [2020-10-27 15:03:11,748 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-27 15:03:12,167 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-27 15:03:12,595 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-27 15:03:12,870 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42