/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loops-crafted-1/in-de61.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:48:35,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:48:35,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:48:35,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:48:35,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:48:35,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:48:35,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:48:35,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:48:35,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:48:35,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:48:35,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:48:35,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:48:35,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:48:35,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:48:35,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:48:35,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:48:35,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:48:35,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:48:35,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:48:35,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:48:35,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:48:35,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:48:35,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:48:35,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:48:35,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:48:35,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:48:35,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:48:35,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:48:35,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:48:35,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:48:35,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:48:35,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:48:35,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:48:35,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:48:35,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:48:35,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:48:35,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:48:35,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:48:35,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:48:35,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:48:35,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:48:35,232 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 [2020-10-29 09:48:35,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:48:35,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:48:35,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:48:35,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:48:35,264 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:48:35,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:48:35,265 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:48:35,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:48:35,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:48:35,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:48:35,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:48:35,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:48:35,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:48:35,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:48:35,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:48:35,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:48:35,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:48:35,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:48:35,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:48:35,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:48:35,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:48:35,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:48:35,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:48:35,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:48:35,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:48:35,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:48:35,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:48:35,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:48:35,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:48:35,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:48:35,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:48:35,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:48:35,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:48:35,684 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:48:35,685 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:48:35,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-29 09:48:35,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06851f3a6/a8bdbe1513d4449fbda83aeaf8a402b1/FLAG17db9618d [2020-10-29 09:48:36,566 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:48:36,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-29 09:48:36,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06851f3a6/a8bdbe1513d4449fbda83aeaf8a402b1/FLAG17db9618d [2020-10-29 09:48:36,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06851f3a6/a8bdbe1513d4449fbda83aeaf8a402b1 [2020-10-29 09:48:36,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:48:36,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:48:36,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:48:36,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:48:36,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:48:36,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:48:36" (1/1) ... [2020-10-29 09:48:36,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6230d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:36, skipping insertion in model container [2020-10-29 09:48:36,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:48:36" (1/1) ... [2020-10-29 09:48:36,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:48:36,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:48:37,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:48:37,030 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:48:37,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:48:37,069 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:48:37,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37 WrapperNode [2020-10-29 09:48:37,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:48:37,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:48:37,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:48:37,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:48:37,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37" (1/1) ... [2020-10-29 09:48:37,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37" (1/1) ... [2020-10-29 09:48:37,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37" (1/1) ... [2020-10-29 09:48:37,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37" (1/1) ... [2020-10-29 09:48:37,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37" (1/1) ... [2020-10-29 09:48:37,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37" (1/1) ... [2020-10-29 09:48:37,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37" (1/1) ... [2020-10-29 09:48:37,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:48:37,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:48:37,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:48:37,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:48:37,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37" (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 [2020-10-29 09:48:37,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:48:37,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:48:37,243 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:48:37,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:48:37,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:48:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:48:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:48:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:48:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:48:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 09:48:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:48:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:48:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:48:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:48:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:48:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:48:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:48:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:48:37,812 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:48:37,812 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-29 09:48:37,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:48:37 BoogieIcfgContainer [2020-10-29 09:48:37,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:48:37,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:48:37,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:48:37,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:48:37,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:48:36" (1/3) ... [2020-10-29 09:48:37,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f71c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:48:37, skipping insertion in model container [2020-10-29 09:48:37,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:48:37" (2/3) ... [2020-10-29 09:48:37,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f71c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:48:37, skipping insertion in model container [2020-10-29 09:48:37,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:48:37" (3/3) ... [2020-10-29 09:48:37,828 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de61.c [2020-10-29 09:48:37,844 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:48:37,850 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:48:37,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:48:37,912 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:48:37,912 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:48:37,912 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:48:37,913 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:48:37,913 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:48:37,913 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:48:37,913 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:48:37,913 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:48:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-29 09:48:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:48:37,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:37,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:37,953 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash -929595754, now seen corresponding path program 1 times [2020-10-29 09:48:37,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:37,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592112226] [2020-10-29 09:48:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:38,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:38,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:38,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:38,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:39,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:39,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:48:39,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:39,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1179 [2020-10-29 09:48:39,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:39,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:48:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:48:39,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:48:39,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:39,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:39,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:39,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:39,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:48:39,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:39,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:39,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:39,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:39,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:39,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:39,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592112226] [2020-10-29 09:48:39,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:39,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:48:39,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767707117] [2020-10-29 09:48:39,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:39,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:39,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:39,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:39,690 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states. [2020-10-29 09:48:40,173 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-29 09:48:40,430 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-29 09:48:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:40,994 INFO L93 Difference]: Finished difference Result 88 states and 158 transitions. [2020-10-29 09:48:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:48:40,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-29 09:48:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:41,006 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:48:41,006 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:48:41,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:48:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:48:41,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-29 09:48:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:48:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2020-10-29 09:48:41,058 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 18 [2020-10-29 09:48:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:41,059 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2020-10-29 09:48:41,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2020-10-29 09:48:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:48:41,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:41,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:41,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:48:41,061 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:41,062 INFO L82 PathProgramCache]: Analyzing trace with hash 956523487, now seen corresponding path program 1 times [2020-10-29 09:48:41,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:41,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342615514] [2020-10-29 09:48:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:41,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:41,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:48:41,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:41,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-29 09:48:41,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:41,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:41,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:48:41,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:41,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:48:41,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:48:41,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:41,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:41,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:41,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:41,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:48:41,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:41,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:41,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:41,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:41,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:41,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:41,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342615514] [2020-10-29 09:48:41,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:41,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:48:41,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146778221] [2020-10-29 09:48:41,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:48:41,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:41,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:48:41,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:48:41,493 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand 4 states. [2020-10-29 09:48:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:41,598 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2020-10-29 09:48:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:48:41,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-29 09:48:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:41,600 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:48:41,600 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:48:41,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:48:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:48:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:48:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-29 09:48:41,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 19 [2020-10-29 09:48:41,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:41,611 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-29 09:48:41,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:48:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-29 09:48:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:48:41,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:41,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:41,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:48:41,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:41,614 INFO L82 PathProgramCache]: Analyzing trace with hash -785900514, now seen corresponding path program 1 times [2020-10-29 09:48:41,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:41,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304228048] [2020-10-29 09:48:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:41,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:42,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:42,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:48:42,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:48:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-29 09:48:42,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:42,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:48:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:48:42,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:42,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:42,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:42,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:42,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:42,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:42,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:42,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:42,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:42,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:42,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:42,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:42,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:48:42,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304228048] [2020-10-29 09:48:42,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:42,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:48:42,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643349977] [2020-10-29 09:48:42,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:42,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:42,940 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 8 states. [2020-10-29 09:48:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:43,496 INFO L93 Difference]: Finished difference Result 55 states and 76 transitions. [2020-10-29 09:48:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:48:43,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-29 09:48:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:43,501 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:48:43,502 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 09:48:43,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:48:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 09:48:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-29 09:48:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:48:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2020-10-29 09:48:43,513 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 19 [2020-10-29 09:48:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:43,514 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2020-10-29 09:48:43,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2020-10-29 09:48:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:48:43,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:43,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:43,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:48:43,516 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:43,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1818741925, now seen corresponding path program 1 times [2020-10-29 09:48:43,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:43,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057687001] [2020-10-29 09:48:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:43,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:44,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:44,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:44,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:48:44,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:48:44,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-29 09:48:44,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:44,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:44,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:48:44,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:44,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:48:44,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 09:48:45,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:45,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:45,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:45,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:45,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:45,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:45,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:45,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:45,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:45,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:45,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:45,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:45,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057687001] [2020-10-29 09:48:45,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:45,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:48:45,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281227241] [2020-10-29 09:48:45,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:48:45,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:45,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:48:45,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:48:45,078 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand 10 states. [2020-10-29 09:48:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:45,772 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2020-10-29 09:48:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:48:45,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-29 09:48:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:45,774 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:48:45,774 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:48:45,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:48:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:48:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-29 09:48:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:48:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 73 transitions. [2020-10-29 09:48:45,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 73 transitions. Word has length 20 [2020-10-29 09:48:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:45,789 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 73 transitions. [2020-10-29 09:48:45,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:48:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 73 transitions. [2020-10-29 09:48:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:48:45,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:45,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:45,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:48:45,791 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1192556645, now seen corresponding path program 1 times [2020-10-29 09:48:45,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:45,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286116341] [2020-10-29 09:48:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:45,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:45,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:45,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:45,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:46,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:46,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:48:46,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:48:46,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-29 09:48:46,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:46,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:48:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:46,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:48:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:46,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:46,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:46,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:46,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:46,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:46,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:46,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:46,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:48:46,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286116341] [2020-10-29 09:48:46,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:46,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:48:46,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87376200] [2020-10-29 09:48:46,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:46,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:46,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:46,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:46,253 INFO L87 Difference]: Start difference. First operand 50 states and 73 transitions. Second operand 5 states. [2020-10-29 09:48:46,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:46,454 INFO L93 Difference]: Finished difference Result 63 states and 88 transitions. [2020-10-29 09:48:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:48:46,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-29 09:48:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:46,455 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:48:46,455 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:48:46,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:48:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-29 09:48:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2020-10-29 09:48:46,467 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 20 [2020-10-29 09:48:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:46,467 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2020-10-29 09:48:46,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2020-10-29 09:48:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:48:46,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:46,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:46,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:48:46,469 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1551169887, now seen corresponding path program 1 times [2020-10-29 09:48:46,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:46,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593397321] [2020-10-29 09:48:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:46,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:46,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:46,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:46,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:46,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:48:46,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:46,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-29 09:48:46,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:46,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:48:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:46,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:46,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:46,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:46,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:46,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:46,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:46,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:48:46,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:46,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:46,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:46,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593397321] [2020-10-29 09:48:46,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:46,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:48:46,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984836875] [2020-10-29 09:48:46,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:48:46,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:46,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:48:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:48:46,768 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand 6 states. [2020-10-29 09:48:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:47,192 INFO L93 Difference]: Finished difference Result 76 states and 112 transitions. [2020-10-29 09:48:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:48:47,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-29 09:48:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:47,194 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:48:47,195 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:48:47,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:48:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-10-29 09:48:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:48:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2020-10-29 09:48:47,206 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 21 [2020-10-29 09:48:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:47,207 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2020-10-29 09:48:47,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:48:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2020-10-29 09:48:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:48:47,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:47,208 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] [2020-10-29 09:48:47,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:48:47,208 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2018464290, now seen corresponding path program 1 times [2020-10-29 09:48:47,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:47,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505858914] [2020-10-29 09:48:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:47,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:47,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:48:47,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:48:47,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-29 09:48:47,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:47,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:47,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:48:47,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:47,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:48:47,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:47,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:47,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:47,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:47,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:47,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:47,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:47,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:47,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:47,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:47,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:47,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:47,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505858914] [2020-10-29 09:48:47,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:47,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:48:47,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379204002] [2020-10-29 09:48:47,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:47,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:47,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:47,863 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand 5 states. [2020-10-29 09:48:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:48,052 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-10-29 09:48:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:48:48,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-29 09:48:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:48,054 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:48:48,054 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:48:48,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:48:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-29 09:48:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2020-10-29 09:48:48,080 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 21 [2020-10-29 09:48:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:48,082 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2020-10-29 09:48:48,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2020-10-29 09:48:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:48:48,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:48,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:48,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:48:48,084 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1194580027, now seen corresponding path program 1 times [2020-10-29 09:48:48,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:48,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787576141] [2020-10-29 09:48:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:48,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:48,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:48:48,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:48,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-29 09:48:48,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:48,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:48,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:48:48,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:48:48,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:48:48,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:48,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:48,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:48,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:48,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:48,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:48,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:48,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:48,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:48,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:48,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:48:48,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787576141] [2020-10-29 09:48:48,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:48,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:48:48,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691609512] [2020-10-29 09:48:48,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:48,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:48,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:48,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:48,277 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand 5 states. [2020-10-29 09:48:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:48,462 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2020-10-29 09:48:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:48:48,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-29 09:48:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:48,464 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:48:48,464 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:48:48,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:48:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-10-29 09:48:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:48:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2020-10-29 09:48:48,484 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 22 [2020-10-29 09:48:48,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:48,486 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-10-29 09:48:48,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:48,486 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2020-10-29 09:48:48,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:48:48,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:48,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:48,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:48:48,488 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash 667542586, now seen corresponding path program 2 times [2020-10-29 09:48:48,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:48,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460155966] [2020-10-29 09:48:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:48,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:49,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:49,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:49,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:49,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:49,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:48:49,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:48:49,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1400 [2020-10-29 09:48:49,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:49,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:48:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:48:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:50,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:50,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:50,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:50,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:50,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:50,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:50,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:50,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:50,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460155966] [2020-10-29 09:48:50,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:50,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:48:50,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815002811] [2020-10-29 09:48:50,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:48:50,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:48:50,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:48:50,345 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand 12 states. [2020-10-29 09:48:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:51,751 INFO L93 Difference]: Finished difference Result 132 states and 194 transitions. [2020-10-29 09:48:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:48:51,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-29 09:48:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:51,754 INFO L225 Difference]: With dead ends: 132 [2020-10-29 09:48:51,754 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 09:48:51,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:48:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 09:48:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2020-10-29 09:48:51,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 09:48:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 141 transitions. [2020-10-29 09:48:51,785 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 141 transitions. Word has length 22 [2020-10-29 09:48:51,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:51,786 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 141 transitions. [2020-10-29 09:48:51,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:48:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 141 transitions. [2020-10-29 09:48:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:48:51,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:51,790 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] [2020-10-29 09:48:51,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:48:51,791 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:51,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1690443874, now seen corresponding path program 2 times [2020-10-29 09:48:51,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:51,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740150726] [2020-10-29 09:48:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:51,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:51,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:51,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:51,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:52,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:52,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:48:52,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:52,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-29 09:48:52,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:52,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:48:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:48:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:48:52,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:52,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:52,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:52,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:52,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:52,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:52,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:48:52,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:52,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:52,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:48:52,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740150726] [2020-10-29 09:48:52,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:52,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:48:52,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720336528] [2020-10-29 09:48:52,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:48:52,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:52,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:48:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:48:52,806 INFO L87 Difference]: Start difference. First operand 98 states and 141 transitions. Second operand 6 states. [2020-10-29 09:48:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:53,203 INFO L93 Difference]: Finished difference Result 190 states and 288 transitions. [2020-10-29 09:48:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:48:53,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-29 09:48:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:53,206 INFO L225 Difference]: With dead ends: 190 [2020-10-29 09:48:53,206 INFO L226 Difference]: Without dead ends: 153 [2020-10-29 09:48:53,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-29 09:48:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2020-10-29 09:48:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 09:48:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2020-10-29 09:48:53,245 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 23 [2020-10-29 09:48:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:53,246 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2020-10-29 09:48:53,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:48:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2020-10-29 09:48:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:48:53,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:53,254 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:53,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:48:53,255 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:53,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash 288321215, now seen corresponding path program 3 times [2020-10-29 09:48:53,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:53,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19150001] [2020-10-29 09:48:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:53,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:53,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:53,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:53,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:53,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:53,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:53,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:53,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:53,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:48:53,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:48:53,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-29 09:48:53,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:53,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:53,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:53,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:53,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:53,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:54,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:54,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:54,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:54,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:54,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:54,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:54,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:54,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:54,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:54,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:54,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:48:54,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19150001] [2020-10-29 09:48:54,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:54,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:48:54,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809540315] [2020-10-29 09:48:54,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:48:54,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:48:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:54,031 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand 7 states. [2020-10-29 09:48:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:54,452 INFO L93 Difference]: Finished difference Result 150 states and 210 transitions. [2020-10-29 09:48:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:54,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-29 09:48:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:54,454 INFO L225 Difference]: With dead ends: 150 [2020-10-29 09:48:54,454 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:48:54,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:54,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:48:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2020-10-29 09:48:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:48:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2020-10-29 09:48:54,470 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 23 [2020-10-29 09:48:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:54,470 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2020-10-29 09:48:54,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:48:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2020-10-29 09:48:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:48:54,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:54,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:54,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:48:54,472 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash 856101694, now seen corresponding path program 4 times [2020-10-29 09:48:54,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:54,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445118094] [2020-10-29 09:48:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:54,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:55,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:55,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:48:55,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:48:55,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-29 09:48:55,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:55,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:55,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:48:55,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:55,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:48:55,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:55,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:55,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:55,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:55,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:55,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:55,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:55,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:55,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:55,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:48:55,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445118094] [2020-10-29 09:48:55,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:55,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:48:55,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323278487] [2020-10-29 09:48:55,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:55,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:55,331 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 8 states. [2020-10-29 09:48:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:55,922 INFO L93 Difference]: Finished difference Result 169 states and 242 transitions. [2020-10-29 09:48:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:48:55,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-29 09:48:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:55,924 INFO L225 Difference]: With dead ends: 169 [2020-10-29 09:48:55,924 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:48:55,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:48:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:48:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2020-10-29 09:48:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-29 09:48:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 175 transitions. [2020-10-29 09:48:55,939 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 175 transitions. Word has length 23 [2020-10-29 09:48:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:55,940 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 175 transitions. [2020-10-29 09:48:55,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 175 transitions. [2020-10-29 09:48:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:48:55,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:55,941 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:55,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:48:55,941 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:55,942 INFO L82 PathProgramCache]: Analyzing trace with hash -931871589, now seen corresponding path program 3 times [2020-10-29 09:48:55,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:55,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327306417] [2020-10-29 09:48:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:55,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:55,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:56,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:56,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:56,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:48:56,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:56,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-10-29 09:48:56,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:56,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:48:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:48:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:57,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:57,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:57,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:57,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:57,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:57,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:57,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:57,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:57,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:48:57,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327306417] [2020-10-29 09:48:57,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:57,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:48:57,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768326859] [2020-10-29 09:48:57,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:48:57,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:48:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:57,077 INFO L87 Difference]: Start difference. First operand 131 states and 175 transitions. Second operand 7 states. [2020-10-29 09:48:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:57,593 INFO L93 Difference]: Finished difference Result 162 states and 216 transitions. [2020-10-29 09:48:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:48:57,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-29 09:48:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:57,595 INFO L225 Difference]: With dead ends: 162 [2020-10-29 09:48:57,595 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:48:57,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:48:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:48:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-10-29 09:48:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-29 09:48:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 154 transitions. [2020-10-29 09:48:57,608 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 154 transitions. Word has length 24 [2020-10-29 09:48:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:57,608 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 154 transitions. [2020-10-29 09:48:57,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:48:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 154 transitions. [2020-10-29 09:48:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:48:57,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:57,609 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:57,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:48:57,610 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:57,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1888500550, now seen corresponding path program 5 times [2020-10-29 09:48:57,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:57,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833525023] [2020-10-29 09:48:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:57,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:57,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:57,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:57,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:57,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:57,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:58,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:58,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:58,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:48:58,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:48:58,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-29 09:48:58,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:58,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:58,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:48:58,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:58,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:48:58,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:58,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:58,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:58,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:58,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:58,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:58,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:58,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:58,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:58,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:58,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:48:58,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833525023] [2020-10-29 09:48:58,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:58,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:48:58,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673377046] [2020-10-29 09:48:58,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:48:58,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:58,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:48:58,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:58,611 INFO L87 Difference]: Start difference. First operand 116 states and 154 transitions. Second operand 9 states. [2020-10-29 09:48:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:59,292 INFO L93 Difference]: Finished difference Result 192 states and 276 transitions. [2020-10-29 09:48:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:48:59,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-29 09:48:59,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:59,295 INFO L225 Difference]: With dead ends: 192 [2020-10-29 09:48:59,295 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 09:48:59,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:48:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 09:48:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 132. [2020-10-29 09:48:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-29 09:48:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 177 transitions. [2020-10-29 09:48:59,315 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 177 transitions. Word has length 24 [2020-10-29 09:48:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:59,317 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 177 transitions. [2020-10-29 09:48:59,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:48:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 177 transitions. [2020-10-29 09:48:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:48:59,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:59,320 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:59,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:48:59,320 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1071824194, now seen corresponding path program 6 times [2020-10-29 09:48:59,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:59,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211539752] [2020-10-29 09:48:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:59,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:59,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:59,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:59,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:59,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:59,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:00,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:00,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:49:00,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:49:00,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-29 09:49:00,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:00,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:49:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:49:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:00,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:00,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:00,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:00,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:00,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:00,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:49:00,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:00,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:00,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:49:00,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211539752] [2020-10-29 09:49:00,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:00,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:49:00,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697012277] [2020-10-29 09:49:00,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:49:00,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:00,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:49:00,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:49:00,404 INFO L87 Difference]: Start difference. First operand 132 states and 177 transitions. Second operand 10 states. [2020-10-29 09:49:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:01,198 INFO L93 Difference]: Finished difference Result 214 states and 311 transitions. [2020-10-29 09:49:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:49:01,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-29 09:49:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:01,200 INFO L225 Difference]: With dead ends: 214 [2020-10-29 09:49:01,200 INFO L226 Difference]: Without dead ends: 186 [2020-10-29 09:49:01,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:49:01,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-29 09:49:01,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 148. [2020-10-29 09:49:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-29 09:49:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 200 transitions. [2020-10-29 09:49:01,217 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 200 transitions. Word has length 25 [2020-10-29 09:49:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:01,217 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 200 transitions. [2020-10-29 09:49:01,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:49:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 200 transitions. [2020-10-29 09:49:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:49:01,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:01,218 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:01,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:49:01,218 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:01,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:01,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1524660934, now seen corresponding path program 7 times [2020-10-29 09:49:01,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:01,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821157492] [2020-10-29 09:49:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:01,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:01,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:01,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:01,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:01,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:02,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:02,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:02,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:49:02,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:49:02,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-29 09:49:02,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:02,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:49:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:49:02,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:02,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:02,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:02,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:02,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:02,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:02,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:02,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:02,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:02,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:02,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:02,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:02,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:49:02,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821157492] [2020-10-29 09:49:02,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:02,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:49:02,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53565252] [2020-10-29 09:49:02,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:49:02,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:02,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:49:02,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:49:02,719 INFO L87 Difference]: Start difference. First operand 148 states and 200 transitions. Second operand 11 states. [2020-10-29 09:49:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:03,693 INFO L93 Difference]: Finished difference Result 236 states and 346 transitions. [2020-10-29 09:49:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:49:03,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-29 09:49:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:03,695 INFO L225 Difference]: With dead ends: 236 [2020-10-29 09:49:03,695 INFO L226 Difference]: Without dead ends: 208 [2020-10-29 09:49:03,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:49:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-29 09:49:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 164. [2020-10-29 09:49:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 09:49:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 223 transitions. [2020-10-29 09:49:03,713 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 223 transitions. Word has length 26 [2020-10-29 09:49:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:03,714 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 223 transitions. [2020-10-29 09:49:03,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:49:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 223 transitions. [2020-10-29 09:49:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:49:03,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:03,715 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:03,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:49:03,715 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash 735809439, now seen corresponding path program 1 times [2020-10-29 09:49:03,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:03,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391078846] [2020-10-29 09:49:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:03,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:03,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:03,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:04,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:05,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:05,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:49:05,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:49:05,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-29 09:49:05,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:05,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:05,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:49:05,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:05,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:49:05,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:05,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:05,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:05,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:05,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:05,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:05,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:49:05,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:05,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:05,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:49:05,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391078846] [2020-10-29 09:49:05,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:05,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:49:05,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592977787] [2020-10-29 09:49:05,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:49:05,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:05,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:49:05,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:49:05,662 INFO L87 Difference]: Start difference. First operand 164 states and 223 transitions. Second operand 13 states. [2020-10-29 09:49:05,990 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-29 09:49:06,148 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-29 09:49:06,361 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-29 09:49:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:06,700 INFO L93 Difference]: Finished difference Result 187 states and 250 transitions. [2020-10-29 09:49:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:49:06,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-29 09:49:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:06,703 INFO L225 Difference]: With dead ends: 187 [2020-10-29 09:49:06,703 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:49:06,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:49:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:49:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2020-10-29 09:49:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 09:49:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 184 transitions. [2020-10-29 09:49:06,722 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 184 transitions. Word has length 27 [2020-10-29 09:49:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:06,722 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 184 transitions. [2020-10-29 09:49:06,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:49:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 184 transitions. [2020-10-29 09:49:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:49:06,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:06,723 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:06,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:49:06,724 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:06,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1966430719, now seen corresponding path program 4 times [2020-10-29 09:49:06,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:06,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334595684] [2020-10-29 09:49:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:06,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:06,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:07,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:07,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:49:07,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:49:07,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-29 09:49:07,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:07,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:49:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:49:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:49:07,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:07,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:07,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:07,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:07,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:07,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:07,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:07,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:07,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:07,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:07,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:07,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:07,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:49:07,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334595684] [2020-10-29 09:49:07,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:07,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:49:07,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776912593] [2020-10-29 09:49:07,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:49:07,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:07,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:49:07,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:49:07,941 INFO L87 Difference]: Start difference. First operand 137 states and 184 transitions. Second operand 7 states. [2020-10-29 09:49:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:08,396 INFO L93 Difference]: Finished difference Result 301 states and 427 transitions. [2020-10-29 09:49:08,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:49:08,397 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-29 09:49:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:08,399 INFO L225 Difference]: With dead ends: 301 [2020-10-29 09:49:08,400 INFO L226 Difference]: Without dead ends: 239 [2020-10-29 09:49:08,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:49:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-29 09:49:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 159. [2020-10-29 09:49:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-29 09:49:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 212 transitions. [2020-10-29 09:49:08,423 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 212 transitions. Word has length 27 [2020-10-29 09:49:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:08,423 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 212 transitions. [2020-10-29 09:49:08,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:49:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 212 transitions. [2020-10-29 09:49:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:49:08,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:08,424 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:08,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:49:08,424 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:08,425 INFO L82 PathProgramCache]: Analyzing trace with hash 244088410, now seen corresponding path program 5 times [2020-10-29 09:49:08,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:08,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524943816] [2020-10-29 09:49:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:08,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:08,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:08,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:08,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:10,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:10,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:49:10,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:49:10,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2411 [2020-10-29 09:49:10,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:10,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:10,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:49:10,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:49:10,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:49:10,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:11,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:11,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:11,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:11,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:11,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:11,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:49:11,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:11,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:11,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:11,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:11,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:11,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:49:11,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524943816] [2020-10-29 09:49:11,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:11,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:49:11,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307687614] [2020-10-29 09:49:11,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:49:11,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:49:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:49:11,035 INFO L87 Difference]: Start difference. First operand 159 states and 212 transitions. Second operand 8 states. [2020-10-29 09:49:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:11,639 INFO L93 Difference]: Finished difference Result 341 states and 485 transitions. [2020-10-29 09:49:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:49:11,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-29 09:49:11,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:11,642 INFO L225 Difference]: With dead ends: 341 [2020-10-29 09:49:11,644 INFO L226 Difference]: Without dead ends: 290 [2020-10-29 09:49:11,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:49:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-29 09:49:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 187. [2020-10-29 09:49:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-29 09:49:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 247 transitions. [2020-10-29 09:49:11,669 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 247 transitions. Word has length 28 [2020-10-29 09:49:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:11,670 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 247 transitions. [2020-10-29 09:49:11,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:49:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 247 transitions. [2020-10-29 09:49:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:49:11,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:11,671 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:11,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:49:11,671 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:11,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1608915617, now seen corresponding path program 6 times [2020-10-29 09:49:11,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:11,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757434626] [2020-10-29 09:49:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:11,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:11,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:11,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:11,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:14,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:14,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:49:14,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:49:14,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2694 [2020-10-29 09:49:14,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:14,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:49:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:49:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:49:14,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:14,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:14,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:14,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:14,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:14,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:14,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:14,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:14,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:49:14,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757434626] [2020-10-29 09:49:14,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:14,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:49:14,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719062687] [2020-10-29 09:49:14,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:49:14,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:14,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:49:14,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:49:14,531 INFO L87 Difference]: Start difference. First operand 187 states and 247 transitions. Second operand 9 states. [2020-10-29 09:49:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:15,342 INFO L93 Difference]: Finished difference Result 390 states and 553 transitions. [2020-10-29 09:49:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:49:15,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-29 09:49:15,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:15,345 INFO L225 Difference]: With dead ends: 390 [2020-10-29 09:49:15,345 INFO L226 Difference]: Without dead ends: 341 [2020-10-29 09:49:15,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:49:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-29 09:49:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 217. [2020-10-29 09:49:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-29 09:49:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 284 transitions. [2020-10-29 09:49:15,371 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 284 transitions. Word has length 29 [2020-10-29 09:49:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:15,373 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 284 transitions. [2020-10-29 09:49:15,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:49:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 284 transitions. [2020-10-29 09:49:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:15,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:15,375 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:15,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:49:15,375 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1077501690, now seen corresponding path program 7 times [2020-10-29 09:49:15,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:15,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430653721] [2020-10-29 09:49:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:15,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:15,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:15,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:15,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:18,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:18,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:18,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:49:18,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3305 [2020-10-29 09:49:18,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:18,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:49:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:49:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:49:18,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:18,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:18,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:18,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:18,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:18,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:18,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:18,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:18,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:18,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:18,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:18,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:18,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:49:18,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430653721] [2020-10-29 09:49:18,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:18,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:49:18,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088099659] [2020-10-29 09:49:18,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:49:18,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:18,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:49:18,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:49:18,864 INFO L87 Difference]: Start difference. First operand 217 states and 284 transitions. Second operand 9 states. [2020-10-29 09:49:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:19,615 INFO L93 Difference]: Finished difference Result 294 states and 371 transitions. [2020-10-29 09:49:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:49:19,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-29 09:49:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:19,617 INFO L225 Difference]: With dead ends: 294 [2020-10-29 09:49:19,617 INFO L226 Difference]: Without dead ends: 208 [2020-10-29 09:49:19,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:49:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-29 09:49:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 162. [2020-10-29 09:49:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-29 09:49:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 216 transitions. [2020-10-29 09:49:19,640 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 216 transitions. Word has length 30 [2020-10-29 09:49:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:19,640 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 216 transitions. [2020-10-29 09:49:19,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:49:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 216 transitions. [2020-10-29 09:49:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:19,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:19,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:19,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:49:19,642 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:19,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1185830924, now seen corresponding path program 1 times [2020-10-29 09:49:19,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:19,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837865807] [2020-10-29 09:49:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:19,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:19,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:19,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:20,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:20,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:21,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:21,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:21,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:49:21,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-29 09:49:21,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:21,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:49:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:49:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:49:21,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:21,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:21,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:21,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:21,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:21,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:21,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:21,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:21,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:21,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:21,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:21,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:21,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:49:21,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837865807] [2020-10-29 09:49:21,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:21,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:49:21,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131148139] [2020-10-29 09:49:21,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:49:21,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:21,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:49:21,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:49:21,556 INFO L87 Difference]: Start difference. First operand 162 states and 216 transitions. Second operand 10 states. [2020-10-29 09:49:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:30,533 INFO L93 Difference]: Finished difference Result 283 states and 362 transitions. [2020-10-29 09:49:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:49:30,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 09:49:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:30,539 INFO L225 Difference]: With dead ends: 283 [2020-10-29 09:49:30,539 INFO L226 Difference]: Without dead ends: 266 [2020-10-29 09:49:30,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=51, Invalid=219, Unknown=2, NotChecked=0, Total=272 [2020-10-29 09:49:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-29 09:49:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 225. [2020-10-29 09:49:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-29 09:49:30,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 294 transitions. [2020-10-29 09:49:30,564 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 294 transitions. Word has length 30 [2020-10-29 09:49:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:30,564 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 294 transitions. [2020-10-29 09:49:30,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:49:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 294 transitions. [2020-10-29 09:49:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:49:30,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:30,565 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:30,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:49:30,566 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:30,566 INFO L82 PathProgramCache]: Analyzing trace with hash 804435038, now seen corresponding path program 2 times [2020-10-29 09:49:30,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:30,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898419963] [2020-10-29 09:49:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:30,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:30,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:30,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:30,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:31,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:31,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:49:31,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:49:31,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1253 [2020-10-29 09:49:31,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:31,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:31,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:49:31,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:49:31,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:49:31,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:31,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:31,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:31,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:31,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:31,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:31,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:49:31,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898419963] [2020-10-29 09:49:31,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:31,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:49:31,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146430158] [2020-10-29 09:49:31,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:49:31,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:31,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:49:31,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:49:31,966 INFO L87 Difference]: Start difference. First operand 225 states and 294 transitions. Second operand 8 states. [2020-10-29 09:49:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:32,544 INFO L93 Difference]: Finished difference Result 403 states and 537 transitions. [2020-10-29 09:49:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:49:32,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-29 09:49:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:32,547 INFO L225 Difference]: With dead ends: 403 [2020-10-29 09:49:32,547 INFO L226 Difference]: Without dead ends: 377 [2020-10-29 09:49:32,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:49:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-29 09:49:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 322. [2020-10-29 09:49:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-29 09:49:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 405 transitions. [2020-10-29 09:49:32,573 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 405 transitions. Word has length 31 [2020-10-29 09:49:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:32,574 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 405 transitions. [2020-10-29 09:49:32,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:49:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 405 transitions. [2020-10-29 09:49:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:49:32,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:32,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:32,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:49:32,575 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash 416838174, now seen corresponding path program 3 times [2020-10-29 09:49:32,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:32,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178503787] [2020-10-29 09:49:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:32,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:32,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:32,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:33,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:33,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:34,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:34,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:49:34,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:49:34,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1793 [2020-10-29 09:49:34,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:34,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:49:34,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:34,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:34,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:34,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:34,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:34,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:34,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:34,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:34,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:34,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:49:34,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178503787] [2020-10-29 09:49:34,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:34,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:49:34,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251885802] [2020-10-29 09:49:34,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:49:34,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:49:34,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:49:34,627 INFO L87 Difference]: Start difference. First operand 322 states and 405 transitions. Second operand 12 states. [2020-10-29 09:49:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:35,802 INFO L93 Difference]: Finished difference Result 357 states and 443 transitions. [2020-10-29 09:49:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:49:35,803 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-29 09:49:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:35,806 INFO L225 Difference]: With dead ends: 357 [2020-10-29 09:49:35,807 INFO L226 Difference]: Without dead ends: 337 [2020-10-29 09:49:35,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:49:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-29 09:49:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 324. [2020-10-29 09:49:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-29 09:49:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 408 transitions. [2020-10-29 09:49:35,835 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 408 transitions. Word has length 33 [2020-10-29 09:49:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:35,835 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 408 transitions. [2020-10-29 09:49:35,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:49:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 408 transitions. [2020-10-29 09:49:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:49:35,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:35,837 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:35,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:49:35,837 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:35,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1028261342, now seen corresponding path program 8 times [2020-10-29 09:49:35,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:35,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487656025] [2020-10-29 09:49:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:35,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:35,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:36,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:40,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:40,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:49:40,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:49:40,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:49:40,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:40,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:40,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:49:40,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:49:40,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:49:40,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:41,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:41,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:41,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:41,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:41,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:41,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:41,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:41,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:41,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:41,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:41,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:41,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 09:49:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487656025] [2020-10-29 09:49:41,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:41,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:49:41,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731975576] [2020-10-29 09:49:41,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:49:41,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:41,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:49:41,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:49:41,052 INFO L87 Difference]: Start difference. First operand 324 states and 408 transitions. Second operand 10 states. [2020-10-29 09:49:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:42,184 INFO L93 Difference]: Finished difference Result 610 states and 832 transitions. [2020-10-29 09:49:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:49:42,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-29 09:49:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:42,189 INFO L225 Difference]: With dead ends: 610 [2020-10-29 09:49:42,189 INFO L226 Difference]: Without dead ends: 539 [2020-10-29 09:49:42,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:49:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-10-29 09:49:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 372. [2020-10-29 09:49:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-29 09:49:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 464 transitions. [2020-10-29 09:49:42,232 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 464 transitions. Word has length 33 [2020-10-29 09:49:42,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:42,232 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 464 transitions. [2020-10-29 09:49:42,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:49:42,232 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 464 transitions. [2020-10-29 09:49:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:49:42,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:42,233 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:42,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:49:42,234 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1574234800, now seen corresponding path program 4 times [2020-10-29 09:49:42,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:42,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460514445] [2020-10-29 09:49:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:42,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:42,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:42,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:43,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:43,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:44,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:45,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:45,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:49:45,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:49:45,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3021 [2020-10-29 09:49:45,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:45,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:45,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:49:45,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:49:45,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:49:45,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:45,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:45,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:45,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:45,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:45,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:45,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:45,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:45,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:45,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 09:49:45,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460514445] [2020-10-29 09:49:45,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:45,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:49:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14302065] [2020-10-29 09:49:45,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:49:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:49:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:49:45,531 INFO L87 Difference]: Start difference. First operand 372 states and 464 transitions. Second operand 11 states. [2020-10-29 09:49:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:46,247 INFO L93 Difference]: Finished difference Result 394 states and 488 transitions. [2020-10-29 09:49:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:49:46,248 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-29 09:49:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:46,251 INFO L225 Difference]: With dead ends: 394 [2020-10-29 09:49:46,251 INFO L226 Difference]: Without dead ends: 384 [2020-10-29 09:49:46,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:49:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-29 09:49:46,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 377. [2020-10-29 09:49:46,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-10-29 09:49:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 469 transitions. [2020-10-29 09:49:46,286 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 469 transitions. Word has length 33 [2020-10-29 09:49:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:46,287 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 469 transitions. [2020-10-29 09:49:46,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:49:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 469 transitions. [2020-10-29 09:49:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:49:46,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:46,288 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:46,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:49:46,288 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash 260885854, now seen corresponding path program 1 times [2020-10-29 09:49:46,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:46,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144151248] [2020-10-29 09:49:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:46,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:46,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:46,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:46,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:46,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:48,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:48,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:49:48,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:49:48,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1730 [2020-10-29 09:49:48,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:48,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:49:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:49:48,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:48,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:48,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:48,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:48,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:48,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:48,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:48,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:48,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:48,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:48,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:49:48,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144151248] [2020-10-29 09:49:48,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:48,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:49:48,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804595267] [2020-10-29 09:49:48,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:49:48,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:48,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:49:48,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:49:48,264 INFO L87 Difference]: Start difference. First operand 377 states and 469 transitions. Second operand 12 states. [2020-10-29 09:49:49,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:49,537 INFO L93 Difference]: Finished difference Result 584 states and 770 transitions. [2020-10-29 09:49:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:49:49,537 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-29 09:49:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:49,541 INFO L225 Difference]: With dead ends: 584 [2020-10-29 09:49:49,541 INFO L226 Difference]: Without dead ends: 513 [2020-10-29 09:49:49,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-10-29 09:49:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 412. [2020-10-29 09:49:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-29 09:49:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 519 transitions. [2020-10-29 09:49:49,578 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 519 transitions. Word has length 33 [2020-10-29 09:49:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:49,578 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 519 transitions. [2020-10-29 09:49:49,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:49:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 519 transitions. [2020-10-29 09:49:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:49:49,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:49,580 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:49,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:49:49,580 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:49,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash -243847461, now seen corresponding path program 9 times [2020-10-29 09:49:49,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:49,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091240474] [2020-10-29 09:49:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:49,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:49,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:49,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:50,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:53,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:53,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:49:53,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:49:53,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4187 [2020-10-29 09:49:53,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:53,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:53,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:49:53,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:49:53,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:49:53,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:54,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:54,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:54,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:54,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:54,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:54,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:49:54,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:54,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:54,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 09:49:54,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091240474] [2020-10-29 09:49:54,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:54,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:49:54,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800122845] [2020-10-29 09:49:54,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:49:54,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:54,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:49:54,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:49:54,042 INFO L87 Difference]: Start difference. First operand 412 states and 519 transitions. Second operand 11 states. [2020-10-29 09:49:54,233 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-29 09:49:56,875 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-29 09:49:57,100 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-29 09:50:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:00,324 INFO L93 Difference]: Finished difference Result 531 states and 654 transitions. [2020-10-29 09:50:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:50:00,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-29 09:50:00,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:00,328 INFO L225 Difference]: With dead ends: 531 [2020-10-29 09:50:00,329 INFO L226 Difference]: Without dead ends: 410 [2020-10-29 09:50:00,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=157, Invalid=598, Unknown=1, NotChecked=0, Total=756 [2020-10-29 09:50:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-29 09:50:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2020-10-29 09:50:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-29 09:50:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 436 transitions. [2020-10-29 09:50:00,375 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 436 transitions. Word has length 34 [2020-10-29 09:50:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:00,375 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 436 transitions. [2020-10-29 09:50:00,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:50:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 436 transitions. [2020-10-29 09:50:00,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:50:00,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:00,379 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:00,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:50:00,380 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash -39946694, now seen corresponding path program 5 times [2020-10-29 09:50:00,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:00,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432879212] [2020-10-29 09:50:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:00,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:00,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:00,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:00,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:03,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:03,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:50:03,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:50:03,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3035 [2020-10-29 09:50:03,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:03,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:50:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:50:03,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:06,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:06,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:06,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:06,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:06,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:06,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:06,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:06,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:06,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 1 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:50:06,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432879212] [2020-10-29 09:50:06,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:06,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:50:06,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782136588] [2020-10-29 09:50:06,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:50:06,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:06,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:50:06,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=228, Unknown=1, NotChecked=0, Total=272 [2020-10-29 09:50:06,105 INFO L87 Difference]: Start difference. First operand 341 states and 436 transitions. Second operand 17 states. [2020-10-29 09:50:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:30,542 INFO L93 Difference]: Finished difference Result 463 states and 615 transitions. [2020-10-29 09:50:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:50:30,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-29 09:50:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:30,546 INFO L225 Difference]: With dead ends: 463 [2020-10-29 09:50:30,547 INFO L226 Difference]: Without dead ends: 414 [2020-10-29 09:50:30,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=120, Invalid=745, Unknown=5, NotChecked=0, Total=870 [2020-10-29 09:50:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-29 09:50:30,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 365. [2020-10-29 09:50:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-29 09:50:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 460 transitions. [2020-10-29 09:50:30,583 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 460 transitions. Word has length 34 [2020-10-29 09:50:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:30,583 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 460 transitions. [2020-10-29 09:50:30,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:50:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 460 transitions. [2020-10-29 09:50:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:50:30,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:30,585 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:30,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:50:30,585 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash -4335924, now seen corresponding path program 2 times [2020-10-29 09:50:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:30,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84033541] [2020-10-29 09:50:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:30,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:30,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:30,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:30,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:31,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:31,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:33,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:33,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:50:33,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:50:33,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2873 [2020-10-29 09:50:33,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:33,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:33,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:50:33,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:50:33,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:50:33,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:33,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:33,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:33,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:33,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:33,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:33,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:33,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:33,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:50:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84033541] [2020-10-29 09:50:33,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:33,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:50:33,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472205613] [2020-10-29 09:50:33,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:50:33,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:50:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:50:33,765 INFO L87 Difference]: Start difference. First operand 365 states and 460 transitions. Second operand 14 states. [2020-10-29 09:50:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:34,864 INFO L93 Difference]: Finished difference Result 398 states and 498 transitions. [2020-10-29 09:50:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:50:34,865 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-29 09:50:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:34,868 INFO L225 Difference]: With dead ends: 398 [2020-10-29 09:50:34,870 INFO L226 Difference]: Without dead ends: 389 [2020-10-29 09:50:34,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:50:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-29 09:50:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 381. [2020-10-29 09:50:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-29 09:50:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 478 transitions. [2020-10-29 09:50:34,911 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 478 transitions. Word has length 34 [2020-10-29 09:50:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:34,911 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 478 transitions. [2020-10-29 09:50:34,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:50:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 478 transitions. [2020-10-29 09:50:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:50:34,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:34,914 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:34,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:50:34,914 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:34,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1213387738, now seen corresponding path program 2 times [2020-10-29 09:50:34,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:34,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116650168] [2020-10-29 09:50:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:34,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:34,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:36,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:38,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:50:38,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:50:38,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3608 [2020-10-29 09:50:38,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:38,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:38,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:50:38,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:38,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:50:38,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:38,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:38,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:38,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:38,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:38,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:38,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:38,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:38,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:50:38,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116650168] [2020-10-29 09:50:38,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:38,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:50:38,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856842819] [2020-10-29 09:50:38,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:50:38,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:38,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:50:38,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:50:38,859 INFO L87 Difference]: Start difference. First operand 381 states and 478 transitions. Second operand 13 states. [2020-10-29 09:50:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:40,472 INFO L93 Difference]: Finished difference Result 607 states and 816 transitions. [2020-10-29 09:50:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:50:40,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-29 09:50:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:40,477 INFO L225 Difference]: With dead ends: 607 [2020-10-29 09:50:40,477 INFO L226 Difference]: Without dead ends: 529 [2020-10-29 09:50:40,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:40,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-10-29 09:50:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 406. [2020-10-29 09:50:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-29 09:50:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 513 transitions. [2020-10-29 09:50:40,518 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 513 transitions. Word has length 34 [2020-10-29 09:50:40,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:40,519 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 513 transitions. [2020-10-29 09:50:40,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:50:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 513 transitions. [2020-10-29 09:50:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:50:40,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:40,520 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:40,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:50:40,521 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:40,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1730998882, now seen corresponding path program 6 times [2020-10-29 09:50:40,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:40,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252083935] [2020-10-29 09:50:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:40,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:40,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:40,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:40,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:40,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:42,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:44,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:44,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:50:44,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:50:44,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3682 [2020-10-29 09:50:44,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:44,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:44,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:50:44,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:50:44,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:50:44,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:46,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:46,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:46,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:46,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:46,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:46,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:46,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:46,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:46,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:46,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:46,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:46,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:50:46,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252083935] [2020-10-29 09:50:46,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:46,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:50:46,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945485072] [2020-10-29 09:50:46,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:50:46,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:46,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:50:46,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=208, Unknown=1, NotChecked=0, Total=240 [2020-10-29 09:50:46,730 INFO L87 Difference]: Start difference. First operand 406 states and 513 transitions. Second operand 16 states. [2020-10-29 09:50:53,747 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-29 09:50:56,328 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-29 09:51:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:01,163 INFO L93 Difference]: Finished difference Result 438 states and 549 transitions. [2020-10-29 09:51:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:51:01,163 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-29 09:51:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:01,167 INFO L225 Difference]: With dead ends: 438 [2020-10-29 09:51:01,167 INFO L226 Difference]: Without dead ends: 429 [2020-10-29 09:51:01,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=133, Invalid=920, Unknown=3, NotChecked=0, Total=1056 [2020-10-29 09:51:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-29 09:51:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 408. [2020-10-29 09:51:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-10-29 09:51:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 516 transitions. [2020-10-29 09:51:01,201 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 516 transitions. Word has length 35 [2020-10-29 09:51:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:01,201 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 516 transitions. [2020-10-29 09:51:01,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:51:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 516 transitions. [2020-10-29 09:51:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:51:01,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:01,203 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:01,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:51:01,203 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:01,204 INFO L82 PathProgramCache]: Analyzing trace with hash 825869743, now seen corresponding path program 1 times [2020-10-29 09:51:01,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:01,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261825366] [2020-10-29 09:51:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:01,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:01,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:01,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:03,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:06,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:06,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:51:06,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:51:06,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:51:06,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:06,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:06,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:51:06,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:06,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:51:06,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:06,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:06,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:06,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:06,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:06,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:06,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:06,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:06,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:06,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:06,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:06,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:06,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-29 09:51:06,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261825366] [2020-10-29 09:51:06,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:06,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:51:06,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098586317] [2020-10-29 09:51:06,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:51:06,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:51:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:51:06,810 INFO L87 Difference]: Start difference. First operand 408 states and 516 transitions. Second operand 18 states. [2020-10-29 09:51:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:19,030 INFO L93 Difference]: Finished difference Result 677 states and 902 transitions. [2020-10-29 09:51:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-29 09:51:19,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-29 09:51:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:19,033 INFO L225 Difference]: With dead ends: 677 [2020-10-29 09:51:19,033 INFO L226 Difference]: Without dead ends: 609 [2020-10-29 09:51:19,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=419, Invalid=3871, Unknown=0, NotChecked=0, Total=4290 [2020-10-29 09:51:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-10-29 09:51:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 478. [2020-10-29 09:51:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-10-29 09:51:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 596 transitions. [2020-10-29 09:51:19,078 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 596 transitions. Word has length 35 [2020-10-29 09:51:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:19,078 INFO L481 AbstractCegarLoop]: Abstraction has 478 states and 596 transitions. [2020-10-29 09:51:19,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:51:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 596 transitions. [2020-10-29 09:51:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:51:19,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:19,080 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:19,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:51:19,080 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash 676175070, now seen corresponding path program 3 times [2020-10-29 09:51:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:19,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145935928] [2020-10-29 09:51:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:19,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:19,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:19,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:19,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:19,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:22,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:22,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:51:22,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:51:22,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2967 [2020-10-29 09:51:22,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:22,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:22,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:51:22,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:22,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:51:22,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:22,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:22,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:22,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:22,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:22,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:22,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:22,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:22,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:22,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:22,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:22,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:51:22,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145935928] [2020-10-29 09:51:22,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:22,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:51:22,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054413876] [2020-10-29 09:51:22,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:51:22,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:22,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:51:22,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:51:22,377 INFO L87 Difference]: Start difference. First operand 478 states and 596 transitions. Second operand 14 states. [2020-10-29 09:51:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:24,238 INFO L93 Difference]: Finished difference Result 727 states and 973 transitions. [2020-10-29 09:51:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:51:24,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-29 09:51:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:24,243 INFO L225 Difference]: With dead ends: 727 [2020-10-29 09:51:24,243 INFO L226 Difference]: Without dead ends: 648 [2020-10-29 09:51:24,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:51:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-10-29 09:51:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 505. [2020-10-29 09:51:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-29 09:51:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 634 transitions. [2020-10-29 09:51:24,288 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 634 transitions. Word has length 35 [2020-10-29 09:51:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:24,289 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 634 transitions. [2020-10-29 09:51:24,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:51:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 634 transitions. [2020-10-29 09:51:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:51:24,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:24,290 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:24,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:51:24,291 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:24,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1759054375, now seen corresponding path program 7 times [2020-10-29 09:51:24,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:24,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753355545] [2020-10-29 09:51:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:24,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:24,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:24,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:25,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:25,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:26,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:26,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:51:26,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:51:26,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2344 [2020-10-29 09:51:26,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:26,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:26,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:51:26,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:26,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:51:26,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:27,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:27,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:27,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:27,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:27,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:27,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:27,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:27,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:27,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-29 09:51:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753355545] [2020-10-29 09:51:27,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:27,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:51:27,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510542262] [2020-10-29 09:51:27,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:51:27,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:27,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:51:27,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:51:27,028 INFO L87 Difference]: Start difference. First operand 505 states and 634 transitions. Second operand 14 states. [2020-10-29 09:51:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:35,045 INFO L93 Difference]: Finished difference Result 519 states and 647 transitions. [2020-10-29 09:51:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:51:35,046 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-29 09:51:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:35,048 INFO L225 Difference]: With dead ends: 519 [2020-10-29 09:51:35,048 INFO L226 Difference]: Without dead ends: 492 [2020-10-29 09:51:35,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:51:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-10-29 09:51:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2020-10-29 09:51:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-10-29 09:51:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 620 transitions. [2020-10-29 09:51:35,090 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 620 transitions. Word has length 36 [2020-10-29 09:51:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:35,090 INFO L481 AbstractCegarLoop]: Abstraction has 492 states and 620 transitions. [2020-10-29 09:51:35,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:51:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 620 transitions. [2020-10-29 09:51:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:51:35,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:35,092 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:35,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:51:35,092 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:35,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash 714812666, now seen corresponding path program 8 times [2020-10-29 09:51:35,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:35,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906130173] [2020-10-29 09:51:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:35,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:35,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:35,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:35,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:36,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:37,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:37,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:51:37,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:51:37,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2002 [2020-10-29 09:51:37,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:37,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:51:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:51:37,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:38,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:38,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:38,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:38,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:38,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:38,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:51:38,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:38,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:38,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:38,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:38,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:38,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:51:38,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906130173] [2020-10-29 09:51:38,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:38,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:51:38,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854340835] [2020-10-29 09:51:38,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:51:38,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:38,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:51:38,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:51:38,238 INFO L87 Difference]: Start difference. First operand 492 states and 620 transitions. Second operand 17 states. [2020-10-29 09:51:39,098 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:51:39,297 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-29 09:51:39,496 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 09:51:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:39,783 INFO L93 Difference]: Finished difference Result 506 states and 633 transitions. [2020-10-29 09:51:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:51:39,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-29 09:51:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:39,787 INFO L225 Difference]: With dead ends: 506 [2020-10-29 09:51:39,787 INFO L226 Difference]: Without dead ends: 484 [2020-10-29 09:51:39,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:51:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-29 09:51:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2020-10-29 09:51:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-10-29 09:51:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 611 transitions. [2020-10-29 09:51:39,832 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 611 transitions. Word has length 36 [2020-10-29 09:51:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:39,832 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 611 transitions. [2020-10-29 09:51:39,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:51:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 611 transitions. [2020-10-29 09:51:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:51:39,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:39,834 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:39,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:51:39,834 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash 559172282, now seen corresponding path program 3 times [2020-10-29 09:51:39,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:39,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288191793] [2020-10-29 09:51:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:39,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:39,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:39,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:40,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:40,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:41,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:43,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:43,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:51:43,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:51:43,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3698 [2020-10-29 09:51:43,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:43,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:43,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:51:43,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:51:43,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:51:43,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:51:43,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:43,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:43,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:43,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:43,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:51:43,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:43,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:43,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-29 09:51:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288191793] [2020-10-29 09:51:43,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:43,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:51:43,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665573979] [2020-10-29 09:51:43,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:51:43,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:43,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:51:43,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:51:43,943 INFO L87 Difference]: Start difference. First operand 484 states and 611 transitions. Second operand 15 states. [2020-10-29 09:51:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:47,342 INFO L93 Difference]: Finished difference Result 526 states and 658 transitions. [2020-10-29 09:51:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:51:47,343 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-29 09:51:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:47,345 INFO L225 Difference]: With dead ends: 526 [2020-10-29 09:51:47,345 INFO L226 Difference]: Without dead ends: 517 [2020-10-29 09:51:47,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:51:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-29 09:51:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 500. [2020-10-29 09:51:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-29 09:51:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 629 transitions. [2020-10-29 09:51:47,384 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 629 transitions. Word has length 36 [2020-10-29 09:51:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:47,384 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 629 transitions. [2020-10-29 09:51:47,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:51:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 629 transitions. [2020-10-29 09:51:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:51:47,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:47,386 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:47,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:51:47,387 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1202451546, now seen corresponding path program 4 times [2020-10-29 09:51:47,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:47,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938788509] [2020-10-29 09:51:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:47,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:47,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:47,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:47,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:48,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:49,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:49,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:51:49,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:51:49,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2541 [2020-10-29 09:51:49,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:49,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:49,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:51:49,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:49,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:51:49,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:50,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:50,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:50,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:50,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:50,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:50,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:50,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:50,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:50,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:51:50,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938788509] [2020-10-29 09:51:50,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:50,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:51:50,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506931239] [2020-10-29 09:51:50,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:51:50,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:50,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:51:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:51:50,281 INFO L87 Difference]: Start difference. First operand 500 states and 629 transitions. Second operand 15 states. [2020-10-29 09:51:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:52,306 INFO L93 Difference]: Finished difference Result 762 states and 1029 transitions. [2020-10-29 09:51:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:51:52,307 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-29 09:51:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:52,310 INFO L225 Difference]: With dead ends: 762 [2020-10-29 09:51:52,310 INFO L226 Difference]: Without dead ends: 679 [2020-10-29 09:51:52,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:51:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-10-29 09:51:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 527. [2020-10-29 09:51:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-10-29 09:51:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 667 transitions. [2020-10-29 09:51:52,357 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 667 transitions. Word has length 36 [2020-10-29 09:51:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:52,357 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 667 transitions. [2020-10-29 09:51:52,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:51:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 667 transitions. [2020-10-29 09:51:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:51:52,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:52,359 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:52,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:51:52,359 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:52,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1454163775, now seen corresponding path program 10 times [2020-10-29 09:51:52,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:52,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985816390] [2020-10-29 09:51:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:52,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:57,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:57,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:51:57,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:51:57,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:51:57,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:57,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:51:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:51:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:51:57,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:57,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:57,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:57,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:57,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:57,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:57,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:57,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:57,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:57,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:57,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:57,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:57,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-29 09:51:57,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985816390] [2020-10-29 09:51:57,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:57,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:51:57,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908224914] [2020-10-29 09:51:57,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:51:57,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:57,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:51:57,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:51:57,635 INFO L87 Difference]: Start difference. First operand 527 states and 667 transitions. Second operand 11 states. [2020-10-29 09:51:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:58,891 INFO L93 Difference]: Finished difference Result 1099 states and 1509 transitions. [2020-10-29 09:51:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:51:58,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-29 09:51:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:58,895 INFO L225 Difference]: With dead ends: 1099 [2020-10-29 09:51:58,895 INFO L226 Difference]: Without dead ends: 949 [2020-10-29 09:51:58,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:51:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2020-10-29 09:51:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 586. [2020-10-29 09:51:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-29 09:51:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 736 transitions. [2020-10-29 09:51:58,949 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 736 transitions. Word has length 37 [2020-10-29 09:51:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:58,949 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 736 transitions. [2020-10-29 09:51:58,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:51:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 736 transitions. [2020-10-29 09:51:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:51:58,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:58,951 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:58,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:51:58,951 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1442113680, now seen corresponding path program 9 times [2020-10-29 09:51:58,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:58,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178019222] [2020-10-29 09:51:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:58,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:59,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:59,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:59,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:03,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:03,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:52:03,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:52:03,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:52:03,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:03,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:03,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:52:03,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:52:03,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:52:03,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:04,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:04,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:04,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:04,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:04,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:04,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:04,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:04,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:04,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:04,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:04,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:04,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-29 09:52:04,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178019222] [2020-10-29 09:52:04,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:04,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:52:04,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810325421] [2020-10-29 09:52:04,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:52:04,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:04,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:52:04,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:52:04,449 INFO L87 Difference]: Start difference. First operand 586 states and 736 transitions. Second operand 16 states. [2020-10-29 09:52:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:06,166 INFO L93 Difference]: Finished difference Result 636 states and 795 transitions. [2020-10-29 09:52:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:52:06,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-29 09:52:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:06,169 INFO L225 Difference]: With dead ends: 636 [2020-10-29 09:52:06,169 INFO L226 Difference]: Without dead ends: 627 [2020-10-29 09:52:06,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:52:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-10-29 09:52:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 590. [2020-10-29 09:52:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-10-29 09:52:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 742 transitions. [2020-10-29 09:52:06,209 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 742 transitions. Word has length 37 [2020-10-29 09:52:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:06,209 INFO L481 AbstractCegarLoop]: Abstraction has 590 states and 742 transitions. [2020-10-29 09:52:06,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:52:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 742 transitions. [2020-10-29 09:52:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:52:06,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:06,211 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:06,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:52:06,211 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:06,212 INFO L82 PathProgramCache]: Analyzing trace with hash 337153118, now seen corresponding path program 5 times [2020-10-29 09:52:06,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:06,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389372115] [2020-10-29 09:52:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:06,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:06,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:07,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:07,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:09,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:09,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:52:09,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:52:09,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3298 [2020-10-29 09:52:09,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:09,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:09,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:52:09,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:09,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:52:09,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:09,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:09,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:09,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:09,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:09,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:09,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:09,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:09,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:09,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:52:09,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389372115] [2020-10-29 09:52:09,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:09,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:52:09,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298890923] [2020-10-29 09:52:09,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:52:09,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:52:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:52:09,883 INFO L87 Difference]: Start difference. First operand 590 states and 742 transitions. Second operand 16 states. [2020-10-29 09:52:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:12,316 INFO L93 Difference]: Finished difference Result 889 states and 1201 transitions. [2020-10-29 09:52:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:52:12,317 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-29 09:52:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:12,321 INFO L225 Difference]: With dead ends: 889 [2020-10-29 09:52:12,321 INFO L226 Difference]: Without dead ends: 800 [2020-10-29 09:52:12,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:52:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2020-10-29 09:52:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 619. [2020-10-29 09:52:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2020-10-29 09:52:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 783 transitions. [2020-10-29 09:52:12,373 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 783 transitions. Word has length 37 [2020-10-29 09:52:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:12,373 INFO L481 AbstractCegarLoop]: Abstraction has 619 states and 783 transitions. [2020-10-29 09:52:12,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:52:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 783 transitions. [2020-10-29 09:52:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:52:12,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:12,375 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:12,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:52:12,375 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1631882854, now seen corresponding path program 11 times [2020-10-29 09:52:12,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:12,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49504820] [2020-10-29 09:52:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:12,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:12,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:12,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:12,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:17,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:17,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:52:17,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:52:17,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 09:52:17,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:17,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:17,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:52:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:52:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:52:17,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:17,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:17,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:17,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:17,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:17,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:17,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:17,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:17,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:17,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:17,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:17,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:17,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-29 09:52:17,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49504820] [2020-10-29 09:52:17,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:17,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:52:17,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155516534] [2020-10-29 09:52:17,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:52:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:52:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:52:17,643 INFO L87 Difference]: Start difference. First operand 619 states and 783 transitions. Second operand 12 states. [2020-10-29 09:52:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:21,266 INFO L93 Difference]: Finished difference Result 1268 states and 1741 transitions. [2020-10-29 09:52:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:52:21,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-29 09:52:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:21,271 INFO L225 Difference]: With dead ends: 1268 [2020-10-29 09:52:21,271 INFO L226 Difference]: Without dead ends: 1110 [2020-10-29 09:52:21,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:52:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2020-10-29 09:52:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 683. [2020-10-29 09:52:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2020-10-29 09:52:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 858 transitions. [2020-10-29 09:52:21,319 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 858 transitions. Word has length 38 [2020-10-29 09:52:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:21,319 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 858 transitions. [2020-10-29 09:52:21,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:52:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 858 transitions. [2020-10-29 09:52:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:52:21,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:21,321 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:21,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:52:21,321 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:21,322 INFO L82 PathProgramCache]: Analyzing trace with hash 942530938, now seen corresponding path program 10 times [2020-10-29 09:52:21,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:21,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012039268] [2020-10-29 09:52:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:21,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:21,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking...