/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:22:56,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:22:56,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:22:57,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:22:57,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:22:57,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:22:57,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:22:57,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:22:57,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:22:57,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:22:57,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:22:57,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:22:57,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:22:57,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:22:57,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:22:57,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:22:57,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:22:57,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:22:57,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:22:57,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:22:57,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:22:57,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:22:57,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:22:57,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:22:57,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:22:57,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:22:57,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:22:57,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:22:57,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:22:57,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:22:57,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:22:57,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:22:57,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:22:57,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:22:57,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:22:57,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:22:57,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:22:57,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:22:57,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:22:57,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:22:57,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:22:57,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:22:57,147 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:22:57,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:22:57,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:22:57,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:22:57,152 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:22:57,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:22:57,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:22:57,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:22:57,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:22:57,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:22:57,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:22:57,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:22:57,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:22:57,155 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:22:57,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:22:57,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:22:57,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:22:57,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:22:57,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:22:57,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:22:57,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:22:57,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:22:57,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:22:57,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:22:57,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:22:57,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:22:57,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:22:57,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:22:57,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:22:57,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:22:57,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:22:57,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:22:57,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:22:57,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:22:57,602 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:22:57,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-28 09:22:57,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ff8ab6c4/fb7f89d749d64f1ca61cf6728815edcf/FLAGffee6c524 [2020-10-28 09:22:58,511 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:22:58,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-28 09:22:58,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ff8ab6c4/fb7f89d749d64f1ca61cf6728815edcf/FLAGffee6c524 [2020-10-28 09:22:58,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ff8ab6c4/fb7f89d749d64f1ca61cf6728815edcf [2020-10-28 09:22:58,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:22:58,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:22:58,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:22:58,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:22:58,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:22:58,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:22:58" (1/1) ... [2020-10-28 09:22:58,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5446718e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:58, skipping insertion in model container [2020-10-28 09:22:58,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:22:58" (1/1) ... [2020-10-28 09:22:58,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:22:58,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:22:59,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:22:59,055 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:22:59,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:22:59,113 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:22:59,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59 WrapperNode [2020-10-28 09:22:59,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:22:59,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:22:59,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:22:59,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:22:59,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59" (1/1) ... [2020-10-28 09:22:59,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59" (1/1) ... [2020-10-28 09:22:59,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59" (1/1) ... [2020-10-28 09:22:59,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59" (1/1) ... [2020-10-28 09:22:59,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59" (1/1) ... [2020-10-28 09:22:59,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59" (1/1) ... [2020-10-28 09:22:59,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59" (1/1) ... [2020-10-28 09:22:59,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:22:59,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:22:59,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:22:59,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:22:59,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:22:59,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:22:59,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:22:59,248 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:22:59,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:22:59,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:22:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:22:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:22:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:22:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:22:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:22:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:22:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:22:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:22:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:22:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:22:59,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:22:59,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:22:59,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:22:59,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:22:59,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:22:59,798 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:22:59,798 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:22:59,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:22:59 BoogieIcfgContainer [2020-10-28 09:22:59,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:22:59,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:22:59,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:22:59,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:22:59,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:22:58" (1/3) ... [2020-10-28 09:22:59,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c2227d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:22:59, skipping insertion in model container [2020-10-28 09:22:59,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:59" (2/3) ... [2020-10-28 09:22:59,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c2227d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:22:59, skipping insertion in model container [2020-10-28 09:22:59,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:22:59" (3/3) ... [2020-10-28 09:22:59,815 INFO L111 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2020-10-28 09:22:59,828 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:22:59,834 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:22:59,849 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:22:59,880 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:22:59,880 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:22:59,880 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:22:59,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:22:59,881 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:22:59,881 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:22:59,881 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:22:59,881 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:22:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-28 09:22:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 09:22:59,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:59,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:59,910 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1680670433, now seen corresponding path program 1 times [2020-10-28 09:22:59,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:59,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434201818] [2020-10-28 09:22:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:00,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:00,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:00,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:00,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 09:23:00,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:00,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-28 09:23:00,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:00,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:00,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:23:00,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:00,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:23:00,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:00,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:00,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:00,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:00,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:23:00,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:00,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:00,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:00,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:23:00,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434201818] [2020-10-28 09:23:00,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:23:00,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:23:00,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358613256] [2020-10-28 09:23:00,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:23:00,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:00,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:23:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:23:00,654 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-28 09:23:00,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:00,769 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-10-28 09:23:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:23:00,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-28 09:23:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:00,780 INFO L225 Difference]: With dead ends: 53 [2020-10-28 09:23:00,781 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 09:23:00,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:23:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 09:23:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 09:23:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:23:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-28 09:23:00,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-10-28 09:23:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:00,832 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-28 09:23:00,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:23:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-28 09:23:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 09:23:00,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:00,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:00,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:23:00,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:00,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1259313609, now seen corresponding path program 1 times [2020-10-28 09:23:00,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:00,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404555551] [2020-10-28 09:23:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:00,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:00,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:01,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:01,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 09:23:01,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:01,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-28 09:23:01,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:01,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:01,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:23:01,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:23:01,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:23:01,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:23:01,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:01,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:01,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:01,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:01,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:23:01,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:01,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:01,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:01,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:01,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:01,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:23:01,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404555551] [2020-10-28 09:23:01,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:23:01,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:23:01,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476816874] [2020-10-28 09:23:01,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:23:01,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:23:01,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:23:01,143 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-28 09:23:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:01,270 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-10-28 09:23:01,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:23:01,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 09:23:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:01,272 INFO L225 Difference]: With dead ends: 49 [2020-10-28 09:23:01,272 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 09:23:01,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:23:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 09:23:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-28 09:23:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:23:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-28 09:23:01,284 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-10-28 09:23:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:01,284 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-28 09:23:01,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:23:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-28 09:23:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:23:01,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:01,286 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:01,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:23:01,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:01,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1691183649, now seen corresponding path program 1 times [2020-10-28 09:23:01,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:01,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832506116] [2020-10-28 09:23:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:01,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:01,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:01,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:01,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:02,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:02,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:23:02,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:23:02,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1338 [2020-10-28 09:23:02,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:02,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:02,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:23:02,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:02,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:23:02,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:02,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:02,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:02,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:02,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:02,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:02,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:23:02,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:02,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:02,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:02,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:02,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:02,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:02,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832506116] [2020-10-28 09:23:02,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:02,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:23:02,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062123256] [2020-10-28 09:23:02,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:23:02,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:02,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:23:02,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:23:02,746 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-28 09:23:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:02,990 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-10-28 09:23:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:23:02,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 09:23:02,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:02,992 INFO L225 Difference]: With dead ends: 60 [2020-10-28 09:23:02,992 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:23:02,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:23:02,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:23:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-10-28 09:23:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:23:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-28 09:23:03,003 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 24 [2020-10-28 09:23:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:03,003 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-28 09:23:03,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:23:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-28 09:23:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 09:23:03,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:03,005 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:03,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:23:03,005 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash -803454921, now seen corresponding path program 2 times [2020-10-28 09:23:03,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:03,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346306274] [2020-10-28 09:23:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:03,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:03,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:03,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:03,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:04,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:04,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:08,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:08,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:23:08,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:23:08,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:23:08,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:08,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:08,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:23:08,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:23:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:23:08,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:08,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:08,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:08,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:08,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:08,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:23:08,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:08,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:08,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:08,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:08,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:08,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 09:23:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 09:23:08,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346306274] [2020-10-28 09:23:08,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:08,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:23:08,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448772517] [2020-10-28 09:23:08,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:23:08,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:23:08,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:23:08,137 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2020-10-28 09:23:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:08,313 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2020-10-28 09:23:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:23:08,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-28 09:23:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:08,315 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:23:08,315 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 09:23:08,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:23:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 09:23:08,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-28 09:23:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 09:23:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-28 09:23:08,326 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 32 [2020-10-28 09:23:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:08,326 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-28 09:23:08,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:23:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-28 09:23:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:23:08,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:08,328 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:08,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:23:08,329 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1387868639, now seen corresponding path program 3 times [2020-10-28 09:23:08,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:08,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747905225] [2020-10-28 09:23:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:08,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:08,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:08,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:08,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:08,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:09,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:09,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:13,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:23:13,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:23:13,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 09:23:13,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:13,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:23:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:23:13,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:13,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:13,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:13,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:13,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:13,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:23:13,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:13,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:13,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:13,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:23:13,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747905225] [2020-10-28 09:23:13,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:13,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:23:13,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404049186] [2020-10-28 09:23:13,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:23:13,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:13,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:23:13,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:23:13,518 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 7 states. [2020-10-28 09:23:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:13,717 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-10-28 09:23:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:23:13,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-28 09:23:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:13,719 INFO L225 Difference]: With dead ends: 84 [2020-10-28 09:23:13,719 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 09:23:13,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:23:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 09:23:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-28 09:23:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:23:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-28 09:23:13,729 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 40 [2020-10-28 09:23:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:13,729 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-28 09:23:13,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:23:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-28 09:23:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 09:23:13,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:13,731 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:13,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:23:13,732 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1545787959, now seen corresponding path program 4 times [2020-10-28 09:23:13,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:13,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685029247] [2020-10-28 09:23:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:13,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:14,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:16,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:16,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:18,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:18,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 09:23:18,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:23:18,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:23:18,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:18,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:18,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:23:18,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:18,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:23:18,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:18,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:18,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:18,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:18,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:18,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:18,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:23:18,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:18,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:18,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:18,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:18,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:18,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 09:23:18,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685029247] [2020-10-28 09:23:18,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:18,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:23:18,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870170571] [2020-10-28 09:23:18,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:23:18,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:18,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:23:18,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:23:18,868 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 8 states. [2020-10-28 09:23:19,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:19,083 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-10-28 09:23:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:23:19,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-28 09:23:19,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:19,085 INFO L225 Difference]: With dead ends: 96 [2020-10-28 09:23:19,086 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 09:23:19,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:23:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 09:23:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-28 09:23:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 09:23:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-10-28 09:23:19,095 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 48 [2020-10-28 09:23:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:19,096 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-10-28 09:23:19,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:23:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-10-28 09:23:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:23:19,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:19,098 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:19,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:23:19,098 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:19,099 INFO L82 PathProgramCache]: Analyzing trace with hash -566161953, now seen corresponding path program 5 times [2020-10-28 09:23:19,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:19,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540238863] [2020-10-28 09:23:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:19,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:19,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:19,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:19,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:19,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:19,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:19,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:20,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:20,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:22,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:23,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:24,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:24,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:23:24,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:23:24,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:23:24,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:24,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:24,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:23:24,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:24,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:23:24,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:24,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:24,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:24,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:24,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:24,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:24,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:23:24,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:24,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:24,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-28 09:23:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540238863] [2020-10-28 09:23:24,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:24,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:23:24,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665354722] [2020-10-28 09:23:24,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:23:24,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:23:24,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:23:24,270 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 6 states. [2020-10-28 09:23:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:24,424 INFO L93 Difference]: Finished difference Result 139 states and 180 transitions. [2020-10-28 09:23:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:23:24,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 09:23:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:24,428 INFO L225 Difference]: With dead ends: 139 [2020-10-28 09:23:24,428 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:23:24,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:23:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:23:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-28 09:23:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:23:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-28 09:23:24,453 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 56 [2020-10-28 09:23:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:24,453 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-28 09:23:24,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:23:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-28 09:23:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:23:24,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:24,457 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:24,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:23:24,458 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1039248287, now seen corresponding path program 1 times [2020-10-28 09:23:24,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:24,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309977213] [2020-10-28 09:23:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:24,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:24,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:25,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:25,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:23:25,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:25,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1336 [2020-10-28 09:23:25,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:25,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:25,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:23:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:23:25,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:25,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:25,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:25,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:25,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:25,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:25,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:23:25,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:25,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:25,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:25,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:25,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 09:23:25,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309977213] [2020-10-28 09:23:25,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:25,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:23:25,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524529577] [2020-10-28 09:23:25,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:23:25,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:23:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:23:25,975 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 9 states. [2020-10-28 09:23:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:26,241 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2020-10-28 09:23:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:23:26,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-28 09:23:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:26,243 INFO L225 Difference]: With dead ends: 122 [2020-10-28 09:23:26,243 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 09:23:26,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:23:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 09:23:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2020-10-28 09:23:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:23:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2020-10-28 09:23:26,261 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 56 [2020-10-28 09:23:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:26,262 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2020-10-28 09:23:26,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:23:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2020-10-28 09:23:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:23:26,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:26,266 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:26,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:23:26,266 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:26,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1111730057, now seen corresponding path program 2 times [2020-10-28 09:23:26,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:26,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865870335] [2020-10-28 09:23:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:26,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:26,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:27,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:27,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:23:27,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:27,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1464 [2020-10-28 09:23:27,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:27,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:23:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:23:27,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:27,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:27,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:27,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:27,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:27,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:27,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:23:27,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:27,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:27,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:27,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-28 09:23:27,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865870335] [2020-10-28 09:23:27,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:27,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:23:27,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587499685] [2020-10-28 09:23:27,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:23:27,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:23:27,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:23:27,927 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand 10 states. [2020-10-28 09:23:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:28,191 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2020-10-28 09:23:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:23:28,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-28 09:23:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:28,193 INFO L225 Difference]: With dead ends: 136 [2020-10-28 09:23:28,193 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 09:23:28,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:23:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 09:23:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-28 09:23:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 09:23:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2020-10-28 09:23:28,206 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 64 [2020-10-28 09:23:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:28,210 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2020-10-28 09:23:28,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:23:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2020-10-28 09:23:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:23:28,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:28,212 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:28,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:23:28,216 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2113172063, now seen corresponding path program 3 times [2020-10-28 09:23:28,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:28,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314787915] [2020-10-28 09:23:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:28,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:29,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:29,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:23:29,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:29,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1738 [2020-10-28 09:23:29,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:29,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:29,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:23:29,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:29,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:23:29,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:30,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:30,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:30,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:30,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:30,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:30,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:23:30,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:30,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:30,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:30,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:30,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-28 09:23:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314787915] [2020-10-28 09:23:30,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:30,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:23:30,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543204200] [2020-10-28 09:23:30,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:23:30,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:23:30,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:23:30,117 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand 11 states. [2020-10-28 09:23:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:30,343 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2020-10-28 09:23:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:23:30,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-28 09:23:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:30,345 INFO L225 Difference]: With dead ends: 150 [2020-10-28 09:23:30,345 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:23:30,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:23:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:23:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2020-10-28 09:23:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:23:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2020-10-28 09:23:30,363 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 72 [2020-10-28 09:23:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:30,363 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2020-10-28 09:23:30,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:23:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2020-10-28 09:23:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:23:30,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:30,370 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:30,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:23:30,371 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash -945813193, now seen corresponding path program 4 times [2020-10-28 09:23:30,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:30,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376168605] [2020-10-28 09:23:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:30,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:30,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:32,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:32,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:23:32,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2101 [2020-10-28 09:23:32,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:32,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:23:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:23:32,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:32,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:32,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:32,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:32,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:32,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:32,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:23:32,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:32,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:32,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:32,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:32,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:32,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 09:23:32,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376168605] [2020-10-28 09:23:32,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:32,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:23:32,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997146136] [2020-10-28 09:23:32,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:23:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:23:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:23:32,660 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand 12 states. [2020-10-28 09:23:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:32,893 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2020-10-28 09:23:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:23:32,894 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-10-28 09:23:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:32,895 INFO L225 Difference]: With dead ends: 164 [2020-10-28 09:23:32,895 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 09:23:32,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:23:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 09:23:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-10-28 09:23:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 09:23:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2020-10-28 09:23:32,905 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 80 [2020-10-28 09:23:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:32,906 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2020-10-28 09:23:32,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:23:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2020-10-28 09:23:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 09:23:32,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:32,912 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:32,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:23:32,912 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1175033569, now seen corresponding path program 5 times [2020-10-28 09:23:32,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:32,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785547476] [2020-10-28 09:23:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:32,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:35,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:35,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:23:35,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:35,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2254 [2020-10-28 09:23:35,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:35,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:23:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:23:35,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:35,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:35,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:35,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:35,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:35,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:23:35,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:35,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:35,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:35,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:35,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:35,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 09:23:35,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785547476] [2020-10-28 09:23:35,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:35,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:23:35,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89279050] [2020-10-28 09:23:35,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:23:35,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:35,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:23:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:23:35,400 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand 13 states. [2020-10-28 09:23:35,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:35,816 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2020-10-28 09:23:35,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:23:35,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2020-10-28 09:23:35,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:35,818 INFO L225 Difference]: With dead ends: 178 [2020-10-28 09:23:35,818 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 09:23:35,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:23:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 09:23:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-10-28 09:23:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 09:23:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2020-10-28 09:23:35,832 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 88 [2020-10-28 09:23:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:35,834 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2020-10-28 09:23:35,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:23:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2020-10-28 09:23:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 09:23:35,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:35,837 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:35,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:23:35,837 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:35,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:35,838 INFO L82 PathProgramCache]: Analyzing trace with hash 485288439, now seen corresponding path program 6 times [2020-10-28 09:23:35,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:35,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719780628] [2020-10-28 09:23:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:35,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:35,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:38,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:38,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 09:23:38,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:38,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2844 [2020-10-28 09:23:38,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:38,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:38,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:23:38,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:38,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:23:38,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:38,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:38,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:38,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:38,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:38,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:38,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:23:38,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:38,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:38,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:38,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:38,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:38,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-28 09:23:38,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719780628] [2020-10-28 09:23:38,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:38,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:23:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193761640] [2020-10-28 09:23:38,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:23:38,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:23:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:23:38,915 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand 14 states. [2020-10-28 09:23:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:39,225 INFO L93 Difference]: Finished difference Result 192 states and 233 transitions. [2020-10-28 09:23:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:23:39,226 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2020-10-28 09:23:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:39,227 INFO L225 Difference]: With dead ends: 192 [2020-10-28 09:23:39,227 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 09:23:39,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:23:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 09:23:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2020-10-28 09:23:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 09:23:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 176 transitions. [2020-10-28 09:23:39,239 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 176 transitions. Word has length 96 [2020-10-28 09:23:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:39,240 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 176 transitions. [2020-10-28 09:23:39,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:23:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 176 transitions. [2020-10-28 09:23:39,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 09:23:39,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:39,241 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:39,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:23:39,242 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:39,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2069073887, now seen corresponding path program 7 times [2020-10-28 09:23:39,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:39,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648338399] [2020-10-28 09:23:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:39,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:41,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:41,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 09:23:41,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2071 [2020-10-28 09:23:41,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:41,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:23:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:41,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 09:23:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:41,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:41,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:41,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:41,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:41,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:41,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:41,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:41,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-28 09:23:41,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648338399] [2020-10-28 09:23:41,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:41,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:23:41,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448051571] [2020-10-28 09:23:41,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:23:41,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:41,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:23:41,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:23:41,559 INFO L87 Difference]: Start difference. First operand 141 states and 176 transitions. Second operand 15 states. [2020-10-28 09:23:42,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:42,056 INFO L93 Difference]: Finished difference Result 206 states and 250 transitions. [2020-10-28 09:23:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:23:42,057 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-28 09:23:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:42,059 INFO L225 Difference]: With dead ends: 206 [2020-10-28 09:23:42,059 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 09:23:42,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:23:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 09:23:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2020-10-28 09:23:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 09:23:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 190 transitions. [2020-10-28 09:23:42,067 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 190 transitions. Word has length 104 [2020-10-28 09:23:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:42,067 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 190 transitions. [2020-10-28 09:23:42,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:23:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 190 transitions. [2020-10-28 09:23:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 09:23:42,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:42,069 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:42,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:23:42,069 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -595658057, now seen corresponding path program 8 times [2020-10-28 09:23:42,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:42,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513342548] [2020-10-28 09:23:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:42,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:44,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:44,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 09:23:44,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:44,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2186 [2020-10-28 09:23:44,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:44,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:23:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:23:44,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:44,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:44,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:44,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:44,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:44,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:44,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:44,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:44,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-28 09:23:44,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513342548] [2020-10-28 09:23:44,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:44,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:23:44,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558078859] [2020-10-28 09:23:44,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:23:44,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:44,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:23:44,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:23:44,551 INFO L87 Difference]: Start difference. First operand 152 states and 190 transitions. Second operand 16 states. [2020-10-28 09:23:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:45,028 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2020-10-28 09:23:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:23:45,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-10-28 09:23:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:45,031 INFO L225 Difference]: With dead ends: 220 [2020-10-28 09:23:45,031 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 09:23:45,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:23:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 09:23:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2020-10-28 09:23:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-28 09:23:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 204 transitions. [2020-10-28 09:23:45,041 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 204 transitions. Word has length 112 [2020-10-28 09:23:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:45,041 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 204 transitions. [2020-10-28 09:23:45,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:23:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 204 transitions. [2020-10-28 09:23:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 09:23:45,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:45,043 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:45,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:23:45,043 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash 697833825, now seen corresponding path program 9 times [2020-10-28 09:23:45,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:45,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407939235] [2020-10-28 09:23:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:45,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:45,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:47,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:47,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 09:23:47,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:47,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2526 [2020-10-28 09:23:47,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:47,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:23:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 09:23:47,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:47,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:47,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:47,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:47,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:47,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:47,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:47,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:47,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:47,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:47,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:47,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:47,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-28 09:23:47,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407939235] [2020-10-28 09:23:47,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:47,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:23:47,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187612229] [2020-10-28 09:23:47,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:23:47,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:47,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:23:47,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:23:47,877 INFO L87 Difference]: Start difference. First operand 163 states and 204 transitions. Second operand 17 states. [2020-10-28 09:23:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:48,358 INFO L93 Difference]: Finished difference Result 234 states and 284 transitions. [2020-10-28 09:23:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:23:48,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2020-10-28 09:23:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:48,360 INFO L225 Difference]: With dead ends: 234 [2020-10-28 09:23:48,360 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 09:23:48,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:23:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 09:23:48,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-10-28 09:23:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 09:23:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 218 transitions. [2020-10-28 09:23:48,370 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 218 transitions. Word has length 120 [2020-10-28 09:23:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:48,370 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 218 transitions. [2020-10-28 09:23:48,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:23:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 218 transitions. [2020-10-28 09:23:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 09:23:48,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:48,372 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:48,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:23:48,373 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:48,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:48,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1875756169, now seen corresponding path program 10 times [2020-10-28 09:23:48,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:48,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914954445] [2020-10-28 09:23:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:48,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:51,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:51,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 09:23:51,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:51,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2845 [2020-10-28 09:23:51,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:51,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:51,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:23:51,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:51,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 09:23:51,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:51,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:51,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:51,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:51,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:51,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:51,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:51,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:51,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:51,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:51,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:51,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:51,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-28 09:23:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914954445] [2020-10-28 09:23:51,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:51,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:23:51,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208629728] [2020-10-28 09:23:51,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:23:51,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:23:51,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:23:51,515 INFO L87 Difference]: Start difference. First operand 174 states and 218 transitions. Second operand 18 states. [2020-10-28 09:23:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:51,941 INFO L93 Difference]: Finished difference Result 248 states and 301 transitions. [2020-10-28 09:23:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:23:51,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 128 [2020-10-28 09:23:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:51,944 INFO L225 Difference]: With dead ends: 248 [2020-10-28 09:23:51,944 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 09:23:51,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:23:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 09:23:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 185. [2020-10-28 09:23:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-28 09:23:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 232 transitions. [2020-10-28 09:23:51,954 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 232 transitions. Word has length 128 [2020-10-28 09:23:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:51,954 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 232 transitions. [2020-10-28 09:23:51,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:23:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 232 transitions. [2020-10-28 09:23:51,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 09:23:51,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:51,956 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:51,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:23:51,956 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:51,957 INFO L82 PathProgramCache]: Analyzing trace with hash -714042719, now seen corresponding path program 11 times [2020-10-28 09:23:51,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:51,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664109446] [2020-10-28 09:23:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:51,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:52,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:55,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:55,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 09:23:55,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:23:55,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3333 [2020-10-28 09:23:55,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:55,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:55,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:23:55,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:55,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 09:23:55,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:55,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:55,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:55,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:55,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:55,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:23:55,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:55,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:55,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-28 09:23:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664109446] [2020-10-28 09:23:55,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:55,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:23:55,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783267383] [2020-10-28 09:23:55,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:23:55,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:55,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:23:55,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:23:55,624 INFO L87 Difference]: Start difference. First operand 185 states and 232 transitions. Second operand 19 states. [2020-10-28 09:23:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:56,174 INFO L93 Difference]: Finished difference Result 262 states and 318 transitions. [2020-10-28 09:23:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:23:56,174 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 136 [2020-10-28 09:23:56,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:56,177 INFO L225 Difference]: With dead ends: 262 [2020-10-28 09:23:56,177 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 09:23:56,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:23:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 09:23:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 196. [2020-10-28 09:23:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-28 09:23:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 246 transitions. [2020-10-28 09:23:56,187 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 246 transitions. Word has length 136 [2020-10-28 09:23:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:56,188 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 246 transitions. [2020-10-28 09:23:56,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:23:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 246 transitions. [2020-10-28 09:23:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-28 09:23:56,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:56,190 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:56,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:23:56,190 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash -320689097, now seen corresponding path program 12 times [2020-10-28 09:23:56,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:56,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362938391] [2020-10-28 09:23:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:56,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:56,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:00,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:00,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 09:24:00,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4009 [2020-10-28 09:24:00,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:00,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:24:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 09:24:00,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:00,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:00,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:00,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:00,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:00,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:00,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:24:00,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:00,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:00,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:00,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:00,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:00,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-28 09:24:00,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362938391] [2020-10-28 09:24:00,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:00,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:24:00,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505923481] [2020-10-28 09:24:00,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:24:00,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:00,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:24:00,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:24:00,568 INFO L87 Difference]: Start difference. First operand 196 states and 246 transitions. Second operand 20 states. [2020-10-28 09:24:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:01,128 INFO L93 Difference]: Finished difference Result 276 states and 335 transitions. [2020-10-28 09:24:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:24:01,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 144 [2020-10-28 09:24:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:01,133 INFO L225 Difference]: With dead ends: 276 [2020-10-28 09:24:01,133 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 09:24:01,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:24:01,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 09:24:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2020-10-28 09:24:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 09:24:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 260 transitions. [2020-10-28 09:24:01,156 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 260 transitions. Word has length 144 [2020-10-28 09:24:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:01,156 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 260 transitions. [2020-10-28 09:24:01,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:24:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 260 transitions. [2020-10-28 09:24:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 09:24:01,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:01,162 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:01,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:24:01,162 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 500816865, now seen corresponding path program 13 times [2020-10-28 09:24:01,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:01,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851205318] [2020-10-28 09:24:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:01,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:05,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:05,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 09:24:05,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:05,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4754 [2020-10-28 09:24:05,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:05,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:24:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 09:24:05,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:06,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:06,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:06,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:06,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:06,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:06,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:24:06,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:06,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:06,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:06,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:06,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:06,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-28 09:24:06,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851205318] [2020-10-28 09:24:06,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:06,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:24:06,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582370957] [2020-10-28 09:24:06,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:24:06,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:06,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:24:06,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:24:06,335 INFO L87 Difference]: Start difference. First operand 207 states and 260 transitions. Second operand 21 states. [2020-10-28 09:24:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:06,896 INFO L93 Difference]: Finished difference Result 290 states and 352 transitions. [2020-10-28 09:24:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:24:06,897 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 152 [2020-10-28 09:24:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:06,898 INFO L225 Difference]: With dead ends: 290 [2020-10-28 09:24:06,899 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 09:24:06,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:24:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 09:24:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 218. [2020-10-28 09:24:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-28 09:24:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 274 transitions. [2020-10-28 09:24:06,912 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 274 transitions. Word has length 152 [2020-10-28 09:24:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:06,913 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 274 transitions. [2020-10-28 09:24:06,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:24:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 274 transitions. [2020-10-28 09:24:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 09:24:06,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:06,914 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:06,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:24:06,914 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:06,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1838396169, now seen corresponding path program 14 times [2020-10-28 09:24:06,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:06,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915855291] [2020-10-28 09:24:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:06,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:07,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:11,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:11,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 09:24:11,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:11,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:24:11,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:11,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:11,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:24:11,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:11,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 09:24:11,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:12,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:12,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:12,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:12,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:12,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:12,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:24:12,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:12,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:12,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:12,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:12,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:12,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-28 09:24:12,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915855291] [2020-10-28 09:24:12,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:12,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:24:12,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910705115] [2020-10-28 09:24:12,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:24:12,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:12,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:24:12,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:24:12,342 INFO L87 Difference]: Start difference. First operand 218 states and 274 transitions. Second operand 22 states. [2020-10-28 09:24:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:12,873 INFO L93 Difference]: Finished difference Result 304 states and 369 transitions. [2020-10-28 09:24:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:24:12,874 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 160 [2020-10-28 09:24:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:12,876 INFO L225 Difference]: With dead ends: 304 [2020-10-28 09:24:12,876 INFO L226 Difference]: Without dead ends: 237 [2020-10-28 09:24:12,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:24:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-28 09:24:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2020-10-28 09:24:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-28 09:24:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 288 transitions. [2020-10-28 09:24:12,886 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 288 transitions. Word has length 160 [2020-10-28 09:24:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:12,886 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 288 transitions. [2020-10-28 09:24:12,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:24:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 288 transitions. [2020-10-28 09:24:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-28 09:24:12,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:12,888 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:12,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:24:12,889 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash -847776479, now seen corresponding path program 15 times [2020-10-28 09:24:12,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:12,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250948641] [2020-10-28 09:24:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:12,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:13,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:17,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:17,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 09:24:17,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:17,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:24:17,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:17,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:17,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:24:17,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:17,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 09:24:17,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:18,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:18,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:18,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:18,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:18,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:18,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:24:18,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:18,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:18,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-28 09:24:18,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250948641] [2020-10-28 09:24:18,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:18,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:24:18,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790731993] [2020-10-28 09:24:18,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:24:18,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:18,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:24:18,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:24:18,361 INFO L87 Difference]: Start difference. First operand 229 states and 288 transitions. Second operand 23 states. [2020-10-28 09:24:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:18,951 INFO L93 Difference]: Finished difference Result 318 states and 386 transitions. [2020-10-28 09:24:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:24:18,955 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 168 [2020-10-28 09:24:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:18,956 INFO L225 Difference]: With dead ends: 318 [2020-10-28 09:24:18,957 INFO L226 Difference]: Without dead ends: 248 [2020-10-28 09:24:18,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:24:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-28 09:24:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-28 09:24:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-28 09:24:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 302 transitions. [2020-10-28 09:24:18,968 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 302 transitions. Word has length 168 [2020-10-28 09:24:18,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:18,968 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 302 transitions. [2020-10-28 09:24:18,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:24:18,968 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 302 transitions. [2020-10-28 09:24:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-28 09:24:18,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:18,970 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:18,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:24:18,970 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash -877978185, now seen corresponding path program 16 times [2020-10-28 09:24:18,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:18,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139267173] [2020-10-28 09:24:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:19,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:19,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:23,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:23,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-28 09:24:23,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:24:23,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:23,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:24:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 09:24:24,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:24,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:24,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:24,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:24,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:24,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:24:24,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:24,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:24,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:24,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:24,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:24:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-28 09:24:24,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139267173] [2020-10-28 09:24:24,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:24,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:24:24,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839978447] [2020-10-28 09:24:24,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:24:24,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:24,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:24:24,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:24:24,461 INFO L87 Difference]: Start difference. First operand 240 states and 302 transitions. Second operand 24 states. [2020-10-28 09:24:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:25,109 INFO L93 Difference]: Finished difference Result 332 states and 403 transitions. [2020-10-28 09:24:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:24:25,110 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 176 [2020-10-28 09:24:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:25,112 INFO L225 Difference]: With dead ends: 332 [2020-10-28 09:24:25,112 INFO L226 Difference]: Without dead ends: 259 [2020-10-28 09:24:25,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:24:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-28 09:24:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 251. [2020-10-28 09:24:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-28 09:24:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 316 transitions. [2020-10-28 09:24:25,124 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 316 transitions. Word has length 176 [2020-10-28 09:24:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:25,124 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 316 transitions. [2020-10-28 09:24:25,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:24:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 316 transitions. [2020-10-28 09:24:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-28 09:24:25,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:25,126 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:25,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:24:25,126 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash 602857057, now seen corresponding path program 17 times [2020-10-28 09:24:25,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:25,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193337727] [2020-10-28 09:24:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:25,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:25,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:30,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:30,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-28 09:24:30,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:30,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:24:30,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:30,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:30,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:24:30,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:30,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 09:24:30,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:30,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:30,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:30,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:30,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:30,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:30,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:24:30,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:30,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:30,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:30,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:30,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:30,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-28 09:24:30,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193337727] [2020-10-28 09:24:30,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:30,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:24:30,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268273542] [2020-10-28 09:24:30,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:24:30,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:30,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:24:30,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:24:30,671 INFO L87 Difference]: Start difference. First operand 251 states and 316 transitions. Second operand 25 states. [2020-10-28 09:24:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:31,343 INFO L93 Difference]: Finished difference Result 346 states and 420 transitions. [2020-10-28 09:24:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:24:31,344 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 184 [2020-10-28 09:24:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:31,346 INFO L225 Difference]: With dead ends: 346 [2020-10-28 09:24:31,346 INFO L226 Difference]: Without dead ends: 270 [2020-10-28 09:24:31,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:24:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-28 09:24:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 262. [2020-10-28 09:24:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-28 09:24:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 330 transitions. [2020-10-28 09:24:31,358 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 330 transitions. Word has length 184 [2020-10-28 09:24:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:31,359 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 330 transitions. [2020-10-28 09:24:31,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:24:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 330 transitions. [2020-10-28 09:24:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-28 09:24:31,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:31,360 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:31,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:24:31,361 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1316691575, now seen corresponding path program 18 times [2020-10-28 09:24:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:31,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29315313] [2020-10-28 09:24:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:31,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:31,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:36,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:36,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-28 09:24:36,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:36,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:24:36,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:36,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:24:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 09:24:36,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:36,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:36,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:36,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:36,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:36,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:36,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:24:36,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:36,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:36,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:36,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:36,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:36,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-28 09:24:36,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29315313] [2020-10-28 09:24:36,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:36,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:24:36,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401563446] [2020-10-28 09:24:36,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:24:36,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:36,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:24:36,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:24:36,949 INFO L87 Difference]: Start difference. First operand 262 states and 330 transitions. Second operand 26 states. [2020-10-28 09:24:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:37,668 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2020-10-28 09:24:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:24:37,669 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 192 [2020-10-28 09:24:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:37,671 INFO L225 Difference]: With dead ends: 360 [2020-10-28 09:24:37,671 INFO L226 Difference]: Without dead ends: 281 [2020-10-28 09:24:37,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:24:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-28 09:24:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 273. [2020-10-28 09:24:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-28 09:24:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 344 transitions. [2020-10-28 09:24:37,682 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 344 transitions. Word has length 192 [2020-10-28 09:24:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:37,682 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 344 transitions. [2020-10-28 09:24:37,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:24:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 344 transitions. [2020-10-28 09:24:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-28 09:24:37,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:37,684 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:37,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:24:37,684 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:37,685 INFO L82 PathProgramCache]: Analyzing trace with hash 367171489, now seen corresponding path program 19 times [2020-10-28 09:24:37,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:37,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692794266] [2020-10-28 09:24:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:42,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:42,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-28 09:24:42,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:42,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:24:42,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:42,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:24:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-28 09:24:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:43,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:43,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:43,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:43,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:43,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:43,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:24:43,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:43,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:43,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:43,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:43,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:43,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-28 09:24:43,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692794266] [2020-10-28 09:24:43,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:43,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:24:43,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354129822] [2020-10-28 09:24:43,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:24:43,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:24:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:24:43,434 INFO L87 Difference]: Start difference. First operand 273 states and 344 transitions. Second operand 27 states. [2020-10-28 09:24:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:44,196 INFO L93 Difference]: Finished difference Result 374 states and 454 transitions. [2020-10-28 09:24:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:24:44,197 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 200 [2020-10-28 09:24:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:44,199 INFO L225 Difference]: With dead ends: 374 [2020-10-28 09:24:44,200 INFO L226 Difference]: Without dead ends: 292 [2020-10-28 09:24:44,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:24:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-28 09:24:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 284. [2020-10-28 09:24:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-28 09:24:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2020-10-28 09:24:44,212 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 200 [2020-10-28 09:24:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:44,212 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2020-10-28 09:24:44,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:24:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2020-10-28 09:24:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-28 09:24:44,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:44,214 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:44,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:24:44,214 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:44,215 INFO L82 PathProgramCache]: Analyzing trace with hash -71807177, now seen corresponding path program 20 times [2020-10-28 09:24:44,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:44,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199019311] [2020-10-28 09:24:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:44,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:44,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:49,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:49,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-28 09:24:49,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:49,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:24:49,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:49,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:49,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:24:49,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:49,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 09:24:49,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:49,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:49,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:49,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:49,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:49,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:49,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:24:49,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:49,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:49,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:49,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:49,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:49,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-28 09:24:49,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199019311] [2020-10-28 09:24:49,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:49,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:24:49,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098388689] [2020-10-28 09:24:49,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:24:49,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:49,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:24:49,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:24:49,885 INFO L87 Difference]: Start difference. First operand 284 states and 358 transitions. Second operand 28 states. [2020-10-28 09:24:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:50,641 INFO L93 Difference]: Finished difference Result 388 states and 471 transitions. [2020-10-28 09:24:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:24:50,642 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 208 [2020-10-28 09:24:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:50,644 INFO L225 Difference]: With dead ends: 388 [2020-10-28 09:24:50,644 INFO L226 Difference]: Without dead ends: 303 [2020-10-28 09:24:50,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:24:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-28 09:24:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 295. [2020-10-28 09:24:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-28 09:24:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 372 transitions. [2020-10-28 09:24:50,656 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 372 transitions. Word has length 208 [2020-10-28 09:24:50,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:50,657 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 372 transitions. [2020-10-28 09:24:50,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:24:50,657 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 372 transitions. [2020-10-28 09:24:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-28 09:24:50,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:50,659 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:50,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:24:50,659 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:50,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:50,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1929961247, now seen corresponding path program 21 times [2020-10-28 09:24:50,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:50,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873626876] [2020-10-28 09:24:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:50,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:51,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:55,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:55,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-28 09:24:55,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:24:55,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:24:55,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:55,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:55,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:24:55,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:55,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 09:24:55,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:56,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:56,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:56,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:56,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:56,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:56,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:24:56,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:56,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:56,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:56,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-28 09:24:56,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873626876] [2020-10-28 09:24:56,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:56,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:24:56,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205826684] [2020-10-28 09:24:56,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:24:56,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:56,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:24:56,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:24:56,404 INFO L87 Difference]: Start difference. First operand 295 states and 372 transitions. Second operand 29 states. [2020-10-28 09:24:57,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:57,181 INFO L93 Difference]: Finished difference Result 402 states and 488 transitions. [2020-10-28 09:24:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:24:57,181 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 216 [2020-10-28 09:24:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:57,184 INFO L225 Difference]: With dead ends: 402 [2020-10-28 09:24:57,184 INFO L226 Difference]: Without dead ends: 314 [2020-10-28 09:24:57,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:24:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-28 09:24:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 306. [2020-10-28 09:24:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-28 09:24:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 386 transitions. [2020-10-28 09:24:57,207 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 386 transitions. Word has length 216 [2020-10-28 09:24:57,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:57,207 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 386 transitions. [2020-10-28 09:24:57,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:24:57,207 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 386 transitions. [2020-10-28 09:24:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-28 09:24:57,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:57,210 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:57,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:24:57,210 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:57,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:57,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1623281673, now seen corresponding path program 22 times [2020-10-28 09:24:57,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:57,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262701892] [2020-10-28 09:24:57,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:57,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:57,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:02,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:02,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-28 09:25:02,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:02,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:25:02,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:02,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:02,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:25:02,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:02,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-28 09:25:02,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:02,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:02,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:02,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:02,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:02,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:02,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:25:02,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:02,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:02,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:02,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:02,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:02,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-10-28 09:25:02,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262701892] [2020-10-28 09:25:02,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:02,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:25:02,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466237622] [2020-10-28 09:25:02,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:25:02,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:02,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:25:02,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:25:02,996 INFO L87 Difference]: Start difference. First operand 306 states and 386 transitions. Second operand 30 states. [2020-10-28 09:25:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:03,843 INFO L93 Difference]: Finished difference Result 416 states and 505 transitions. [2020-10-28 09:25:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:25:03,844 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 224 [2020-10-28 09:25:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:03,846 INFO L225 Difference]: With dead ends: 416 [2020-10-28 09:25:03,846 INFO L226 Difference]: Without dead ends: 325 [2020-10-28 09:25:03,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:25:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-28 09:25:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2020-10-28 09:25:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-28 09:25:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 400 transitions. [2020-10-28 09:25:03,859 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 400 transitions. Word has length 224 [2020-10-28 09:25:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:03,860 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 400 transitions. [2020-10-28 09:25:03,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:25:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 400 transitions. [2020-10-28 09:25:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-28 09:25:03,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:03,862 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:03,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:25:03,862 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1479509471, now seen corresponding path program 23 times [2020-10-28 09:25:03,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:03,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381729178] [2020-10-28 09:25:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:03,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:04,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:08,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:08,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-28 09:25:08,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:08,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:25:08,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:08,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:25:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 09:25:08,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:09,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:09,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:09,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:09,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:09,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:09,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:25:09,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:09,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:09,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:09,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:09,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:09,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-28 09:25:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381729178] [2020-10-28 09:25:09,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:09,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:25:09,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158288206] [2020-10-28 09:25:09,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:25:09,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:09,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:25:09,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:25:09,668 INFO L87 Difference]: Start difference. First operand 317 states and 400 transitions. Second operand 31 states. [2020-10-28 09:25:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:10,497 INFO L93 Difference]: Finished difference Result 430 states and 522 transitions. [2020-10-28 09:25:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:25:10,498 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 232 [2020-10-28 09:25:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:10,501 INFO L225 Difference]: With dead ends: 430 [2020-10-28 09:25:10,501 INFO L226 Difference]: Without dead ends: 336 [2020-10-28 09:25:10,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:25:10,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-28 09:25:10,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2020-10-28 09:25:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-28 09:25:10,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 414 transitions. [2020-10-28 09:25:10,514 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 414 transitions. Word has length 232 [2020-10-28 09:25:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:10,515 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 414 transitions. [2020-10-28 09:25:10,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:25:10,515 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 414 transitions. [2020-10-28 09:25:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-28 09:25:10,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:10,517 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:10,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:25:10,517 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:10,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1343602505, now seen corresponding path program 24 times [2020-10-28 09:25:10,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:10,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487331304] [2020-10-28 09:25:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:10,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:11,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 09:25:15,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:16,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:16,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:16,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:16,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:16,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:16,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:25:16,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:16,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:16,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:16,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:16,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:16,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-28 09:25:16,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487331304] [2020-10-28 09:25:16,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:16,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:25:16,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54084367] [2020-10-28 09:25:16,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:25:16,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:25:16,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:25:16,379 INFO L87 Difference]: Start difference. First operand 328 states and 414 transitions. Second operand 32 states. [2020-10-28 09:25:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:17,234 INFO L93 Difference]: Finished difference Result 444 states and 539 transitions. [2020-10-28 09:25:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:25:17,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 240 [2020-10-28 09:25:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:17,237 INFO L225 Difference]: With dead ends: 444 [2020-10-28 09:25:17,237 INFO L226 Difference]: Without dead ends: 347 [2020-10-28 09:25:17,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:25:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-28 09:25:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 339. [2020-10-28 09:25:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-28 09:25:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 428 transitions. [2020-10-28 09:25:17,251 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 428 transitions. Word has length 240 [2020-10-28 09:25:17,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:17,251 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 428 transitions. [2020-10-28 09:25:17,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:25:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 428 transitions. [2020-10-28 09:25:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-28 09:25:17,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:17,253 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:17,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:25:17,254 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash -99441823, now seen corresponding path program 25 times [2020-10-28 09:25:17,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:17,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967694024] [2020-10-28 09:25:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:17,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:22,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:22,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-28 09:25:22,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:22,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:25:22,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:22,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:22,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:25:22,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:22,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-28 09:25:22,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:23,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:23,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:23,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:23,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:23,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:23,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:25:23,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:23,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:23,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:23,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:23,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:23,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-28 09:25:23,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967694024] [2020-10-28 09:25:23,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:23,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:25:23,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562427651] [2020-10-28 09:25:23,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:25:23,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:23,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:25:23,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:25:23,120 INFO L87 Difference]: Start difference. First operand 339 states and 428 transitions. Second operand 33 states. [2020-10-28 09:25:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:24,064 INFO L93 Difference]: Finished difference Result 458 states and 556 transitions. [2020-10-28 09:25:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:25:24,064 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 248 [2020-10-28 09:25:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:24,068 INFO L225 Difference]: With dead ends: 458 [2020-10-28 09:25:24,069 INFO L226 Difference]: Without dead ends: 358 [2020-10-28 09:25:24,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:25:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-28 09:25:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2020-10-28 09:25:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-28 09:25:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 442 transitions. [2020-10-28 09:25:24,085 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 442 transitions. Word has length 248 [2020-10-28 09:25:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:24,086 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 442 transitions. [2020-10-28 09:25:24,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:25:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 442 transitions. [2020-10-28 09:25:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-28 09:25:24,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:24,088 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:24,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:25:24,088 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash 261554551, now seen corresponding path program 26 times [2020-10-28 09:25:24,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:24,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154062159] [2020-10-28 09:25:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:24,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:24,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:29,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-28 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-28 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:29,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:29,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:29,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:29,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:29,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:29,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:25:29,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:29,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:29,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-10-28 09:25:30,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154062159] [2020-10-28 09:25:30,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:30,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:25:30,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92074308] [2020-10-28 09:25:30,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:25:30,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:25:30,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:25:30,028 INFO L87 Difference]: Start difference. First operand 350 states and 442 transitions. Second operand 34 states. [2020-10-28 09:25:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:31,022 INFO L93 Difference]: Finished difference Result 472 states and 573 transitions. [2020-10-28 09:25:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:25:31,023 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 256 [2020-10-28 09:25:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:31,025 INFO L225 Difference]: With dead ends: 472 [2020-10-28 09:25:31,026 INFO L226 Difference]: Without dead ends: 369 [2020-10-28 09:25:31,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:25:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-28 09:25:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 361. [2020-10-28 09:25:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-28 09:25:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 456 transitions. [2020-10-28 09:25:31,039 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 456 transitions. Word has length 256 [2020-10-28 09:25:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:31,040 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 456 transitions. [2020-10-28 09:25:31,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:25:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 456 transitions. [2020-10-28 09:25:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-28 09:25:31,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:31,042 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:31,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:25:31,042 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:31,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:31,043 INFO L82 PathProgramCache]: Analyzing trace with hash -866018143, now seen corresponding path program 27 times [2020-10-28 09:25:31,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:31,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830610444] [2020-10-28 09:25:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:31,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:31,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:36,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-28 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-28 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:36,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:36,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:36,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:36,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:36,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:36,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:25:36,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:36,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:36,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-10-28 09:25:37,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830610444] [2020-10-28 09:25:37,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:37,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:25:37,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649007273] [2020-10-28 09:25:37,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:25:37,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:37,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:25:37,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:25:37,039 INFO L87 Difference]: Start difference. First operand 361 states and 456 transitions. Second operand 35 states. [2020-10-28 09:25:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:37,848 INFO L93 Difference]: Finished difference Result 486 states and 590 transitions. [2020-10-28 09:25:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:25:37,849 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 264 [2020-10-28 09:25:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:37,852 INFO L225 Difference]: With dead ends: 486 [2020-10-28 09:25:37,852 INFO L226 Difference]: Without dead ends: 380 [2020-10-28 09:25:37,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:25:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-28 09:25:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 372. [2020-10-28 09:25:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-28 09:25:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 470 transitions. [2020-10-28 09:25:37,865 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 470 transitions. Word has length 264 [2020-10-28 09:25:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:37,866 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 470 transitions. [2020-10-28 09:25:37,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:25:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 470 transitions. [2020-10-28 09:25:37,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-28 09:25:37,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:37,868 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:37,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:25:37,868 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash -887033289, now seen corresponding path program 28 times [2020-10-28 09:25:37,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:37,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070438096] [2020-10-28 09:25:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:37,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:42,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:42,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-28 09:25:42,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:42,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:25:42,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:42,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:25:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-28 09:25:42,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:43,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:43,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:43,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:43,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:43,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:43,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:25:43,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:43,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:43,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-10-28 09:25:43,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070438096] [2020-10-28 09:25:43,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:43,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:25:43,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651915551] [2020-10-28 09:25:43,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:25:43,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:43,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:25:43,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:25:43,872 INFO L87 Difference]: Start difference. First operand 372 states and 470 transitions. Second operand 36 states. [2020-10-28 09:25:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:44,895 INFO L93 Difference]: Finished difference Result 500 states and 607 transitions. [2020-10-28 09:25:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:25:44,896 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 272 [2020-10-28 09:25:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:44,900 INFO L225 Difference]: With dead ends: 500 [2020-10-28 09:25:44,900 INFO L226 Difference]: Without dead ends: 391 [2020-10-28 09:25:44,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:25:44,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-28 09:25:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 383. [2020-10-28 09:25:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-28 09:25:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 484 transitions. [2020-10-28 09:25:44,913 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 484 transitions. Word has length 272 [2020-10-28 09:25:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:44,913 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 484 transitions. [2020-10-28 09:25:44,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:25:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 484 transitions. [2020-10-28 09:25:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-28 09:25:44,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:44,916 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:44,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:25:44,916 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1549886945, now seen corresponding path program 29 times [2020-10-28 09:25:44,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:44,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441244523] [2020-10-28 09:25:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:44,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:45,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:49,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:49,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-28 09:25:49,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:49,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:25:49,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:49,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:49,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:25:49,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:49,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-28 09:25:49,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:50,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:50,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:50,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:50,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:50,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:50,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:25:50,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:50,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:50,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:50,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:50,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:50,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-28 09:25:50,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441244523] [2020-10-28 09:25:50,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:50,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:25:50,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095506271] [2020-10-28 09:25:50,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:25:50,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:50,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:25:50,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:25:50,977 INFO L87 Difference]: Start difference. First operand 383 states and 484 transitions. Second operand 37 states. [2020-10-28 09:25:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:51,979 INFO L93 Difference]: Finished difference Result 514 states and 624 transitions. [2020-10-28 09:25:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:25:51,980 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 280 [2020-10-28 09:25:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:51,983 INFO L225 Difference]: With dead ends: 514 [2020-10-28 09:25:51,983 INFO L226 Difference]: Without dead ends: 402 [2020-10-28 09:25:51,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:25:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-28 09:25:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 394. [2020-10-28 09:25:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-28 09:25:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 498 transitions. [2020-10-28 09:25:51,996 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 498 transitions. Word has length 280 [2020-10-28 09:25:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:51,996 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 498 transitions. [2020-10-28 09:25:51,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:25:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 498 transitions. [2020-10-28 09:25:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-28 09:25:51,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:51,998 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:51,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:25:51,999 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash -630975753, now seen corresponding path program 30 times [2020-10-28 09:25:52,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:52,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829250294] [2020-10-28 09:25:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:52,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:52,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:57,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:57,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-28 09:25:57,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:25:57,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:57,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:25:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-28 09:25:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:58,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:58,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:58,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:58,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:58,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:58,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:25:58,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:58,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:58,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:58,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:58,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:58,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-10-28 09:25:58,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829250294] [2020-10-28 09:25:58,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:58,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:25:58,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179596354] [2020-10-28 09:25:58,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:25:58,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:58,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:25:58,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:25:58,133 INFO L87 Difference]: Start difference. First operand 394 states and 498 transitions. Second operand 38 states. [2020-10-28 09:25:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:59,107 INFO L93 Difference]: Finished difference Result 528 states and 641 transitions. [2020-10-28 09:25:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:25:59,108 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 288 [2020-10-28 09:25:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:59,111 INFO L225 Difference]: With dead ends: 528 [2020-10-28 09:25:59,112 INFO L226 Difference]: Without dead ends: 413 [2020-10-28 09:25:59,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:25:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-28 09:25:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 405. [2020-10-28 09:25:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-28 09:25:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 512 transitions. [2020-10-28 09:25:59,126 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 512 transitions. Word has length 288 [2020-10-28 09:25:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:59,126 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 512 transitions. [2020-10-28 09:25:59,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:25:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 512 transitions. [2020-10-28 09:25:59,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-28 09:25:59,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:59,129 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:59,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:25:59,129 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:59,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:59,129 INFO L82 PathProgramCache]: Analyzing trace with hash 481689377, now seen corresponding path program 31 times [2020-10-28 09:25:59,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:59,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84430191] [2020-10-28 09:25:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:59,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:00,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:04,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:04,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-28 09:26:04,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:04,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:26:04,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:04,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:26:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-28 09:26:04,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:05,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:05,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:05,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:05,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:05,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:05,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:26:05,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:05,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:05,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-28 09:26:05,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84430191] [2020-10-28 09:26:05,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:05,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:26:05,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927843875] [2020-10-28 09:26:05,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:26:05,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:05,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:26:05,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:26:05,355 INFO L87 Difference]: Start difference. First operand 405 states and 512 transitions. Second operand 39 states. [2020-10-28 09:26:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:06,501 INFO L93 Difference]: Finished difference Result 542 states and 658 transitions. [2020-10-28 09:26:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:26:06,502 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 296 [2020-10-28 09:26:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:06,505 INFO L225 Difference]: With dead ends: 542 [2020-10-28 09:26:06,505 INFO L226 Difference]: Without dead ends: 424 [2020-10-28 09:26:06,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:26:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-28 09:26:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 416. [2020-10-28 09:26:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-28 09:26:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 526 transitions. [2020-10-28 09:26:06,518 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 526 transitions. Word has length 296 [2020-10-28 09:26:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:06,519 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 526 transitions. [2020-10-28 09:26:06,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:26:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 526 transitions. [2020-10-28 09:26:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-28 09:26:06,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:06,522 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:06,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:26:06,522 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash -532913225, now seen corresponding path program 32 times [2020-10-28 09:26:06,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:06,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758293786] [2020-10-28 09:26:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:06,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:11,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:11,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-28 09:26:11,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:11,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:26:11,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:11,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:11,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:26:11,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:11,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-28 09:26:11,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:12,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:12,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:12,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:12,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:12,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:12,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:26:12,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:12,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:12,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-10-28 09:26:12,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758293786] [2020-10-28 09:26:12,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:12,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:26:12,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199411777] [2020-10-28 09:26:12,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:26:12,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:12,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:26:12,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:26:12,818 INFO L87 Difference]: Start difference. First operand 416 states and 526 transitions. Second operand 40 states. [2020-10-28 09:26:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:13,912 INFO L93 Difference]: Finished difference Result 556 states and 675 transitions. [2020-10-28 09:26:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:26:13,913 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 304 [2020-10-28 09:26:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:13,916 INFO L225 Difference]: With dead ends: 556 [2020-10-28 09:26:13,916 INFO L226 Difference]: Without dead ends: 435 [2020-10-28 09:26:13,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:26:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-28 09:26:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 427. [2020-10-28 09:26:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-28 09:26:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 540 transitions. [2020-10-28 09:26:13,930 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 540 transitions. Word has length 304 [2020-10-28 09:26:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:13,930 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 540 transitions. [2020-10-28 09:26:13,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:26:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 540 transitions. [2020-10-28 09:26:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-28 09:26:13,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:13,933 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:13,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:26:13,933 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash -184326047, now seen corresponding path program 33 times [2020-10-28 09:26:13,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:13,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816070435] [2020-10-28 09:26:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:14,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:15,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:19,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:19,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-28 09:26:19,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:19,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 09:26:19,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:19,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:26:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 187 [2020-10-28 09:26:19,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:20,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:20,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:20,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:20,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:20,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:20,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:26:20,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:20,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:20,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-10-28 09:26:20,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816070435] [2020-10-28 09:26:20,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:20,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:26:20,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933429707] [2020-10-28 09:26:20,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:26:20,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:20,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:26:20,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:26:20,279 INFO L87 Difference]: Start difference. First operand 427 states and 540 transitions. Second operand 41 states. [2020-10-28 09:26:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:21,527 INFO L93 Difference]: Finished difference Result 570 states and 692 transitions. [2020-10-28 09:26:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:26:21,528 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 312 [2020-10-28 09:26:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:21,531 INFO L225 Difference]: With dead ends: 570 [2020-10-28 09:26:21,531 INFO L226 Difference]: Without dead ends: 446 [2020-10-28 09:26:21,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:26:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-28 09:26:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 438. [2020-10-28 09:26:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-28 09:26:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 554 transitions. [2020-10-28 09:26:21,544 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 554 transitions. Word has length 312 [2020-10-28 09:26:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:21,544 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 554 transitions. [2020-10-28 09:26:21,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:26:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 554 transitions. [2020-10-28 09:26:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-28 09:26:21,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:21,547 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:21,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:26:21,547 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:21,548 INFO L82 PathProgramCache]: Analyzing trace with hash -360323977, now seen corresponding path program 34 times [2020-10-28 09:26:21,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:21,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879616695] [2020-10-28 09:26:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:21,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:22,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:26,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:26,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-28 09:26:26,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:26,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:26:26,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:26,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 09:26:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-28 09:26:26,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:27,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:27,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:27,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:27,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:27,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:27,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:27,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:27,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2020-10-28 09:26:27,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879616695] [2020-10-28 09:26:27,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:27,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 09:26:27,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897773125] [2020-10-28 09:26:27,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 09:26:27,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:27,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 09:26:27,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:26:27,955 INFO L87 Difference]: Start difference. First operand 438 states and 554 transitions. Second operand 42 states. [2020-10-28 09:26:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:29,163 INFO L93 Difference]: Finished difference Result 584 states and 709 transitions. [2020-10-28 09:26:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 09:26:29,164 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 320 [2020-10-28 09:26:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:29,167 INFO L225 Difference]: With dead ends: 584 [2020-10-28 09:26:29,167 INFO L226 Difference]: Without dead ends: 457 [2020-10-28 09:26:29,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:26:29,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-10-28 09:26:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 449. [2020-10-28 09:26:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-28 09:26:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 568 transitions. [2020-10-28 09:26:29,179 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 568 transitions. Word has length 320 [2020-10-28 09:26:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:29,180 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 568 transitions. [2020-10-28 09:26:29,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 09:26:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 568 transitions. [2020-10-28 09:26:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 09:26:29,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:29,182 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:29,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:26:29,182 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2115133023, now seen corresponding path program 35 times [2020-10-28 09:26:29,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:29,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780656030] [2020-10-28 09:26:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:29,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:30,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:34,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:34,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-28 09:26:34,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:34,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:26:34,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:34,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:34,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 09:26:34,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:34,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-28 09:26:34,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:35,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:35,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:35,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:35,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:35,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:35,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:26:35,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:35,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:35,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:35,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:35,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:35,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-10-28 09:26:35,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780656030] [2020-10-28 09:26:35,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:35,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 09:26:35,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776995121] [2020-10-28 09:26:35,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 09:26:35,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 09:26:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:26:35,654 INFO L87 Difference]: Start difference. First operand 449 states and 568 transitions. Second operand 43 states. [2020-10-28 09:26:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:36,963 INFO L93 Difference]: Finished difference Result 598 states and 726 transitions. [2020-10-28 09:26:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:26:36,964 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 328 [2020-10-28 09:26:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:36,967 INFO L225 Difference]: With dead ends: 598 [2020-10-28 09:26:36,967 INFO L226 Difference]: Without dead ends: 468 [2020-10-28 09:26:36,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:26:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-28 09:26:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 460. [2020-10-28 09:26:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-28 09:26:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 582 transitions. [2020-10-28 09:26:36,993 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 582 transitions. Word has length 328 [2020-10-28 09:26:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:36,993 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 582 transitions. [2020-10-28 09:26:36,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 09:26:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 582 transitions. [2020-10-28 09:26:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-28 09:26:36,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:36,996 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:36,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:26:36,997 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:36,997 INFO L82 PathProgramCache]: Analyzing trace with hash 840734007, now seen corresponding path program 36 times [2020-10-28 09:26:36,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:36,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939618951] [2020-10-28 09:26:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:37,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:37,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:42,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:42,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-28 09:26:42,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:42,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:26:42,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:42,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:42,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 09:26:42,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:42,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-28 09:26:42,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:43,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:43,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:43,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:43,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:43,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:43,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:26:43,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:43,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:43,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:43,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:43,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-28 09:26:43,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939618951] [2020-10-28 09:26:43,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:43,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 09:26:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999749057] [2020-10-28 09:26:43,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 09:26:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 09:26:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:26:43,552 INFO L87 Difference]: Start difference. First operand 460 states and 582 transitions. Second operand 44 states. [2020-10-28 09:26:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:44,831 INFO L93 Difference]: Finished difference Result 612 states and 743 transitions. [2020-10-28 09:26:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 09:26:44,832 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 336 [2020-10-28 09:26:44,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:44,835 INFO L225 Difference]: With dead ends: 612 [2020-10-28 09:26:44,835 INFO L226 Difference]: Without dead ends: 479 [2020-10-28 09:26:44,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:26:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-10-28 09:26:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 471. [2020-10-28 09:26:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-28 09:26:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 596 transitions. [2020-10-28 09:26:44,848 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 596 transitions. Word has length 336 [2020-10-28 09:26:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:44,848 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 596 transitions. [2020-10-28 09:26:44,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 09:26:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 596 transitions. [2020-10-28 09:26:44,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-28 09:26:44,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:44,852 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:44,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 09:26:44,852 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:44,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1427679969, now seen corresponding path program 37 times [2020-10-28 09:26:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:44,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073103024] [2020-10-28 09:26:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:44,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking...